| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CommonStockValue | █████▇▇▇▇▇▇▇▇▇▇▇▇▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁ | 4.749 | 4.749 | 4.749 | 4.749 | 4.749 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.232 | 4.159 | 4.147 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 1.229 | 1.229 | 1.229 | 1.229 | 1.228 | 1.228 | NA | NA | NA |
| us-gaap:PreferredStockParOrStatedValuePerShare | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | 1e-08 | NA | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock | ▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ | 474.916234 | 474.916234 | 474.916234 | 474.916234 | 474.916234 | 445.016234 | 445016.234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 423.166234 | 415.913504 | 414.732011 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 122.905591 | 122.904924 | 122.895643 | 122.891704 | 122.847421 | 122.815636 | NA | NA | NA |
| us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:PreferredStock | ▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁ | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 20.0 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.0 | 0.0 | 0.0 | 0.0 | NA | 0.0 | NA | NA | NA | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:CommonStockSharesIssued | █████▇▇▇▇▇▇▇▇▇▆▆▆▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ | 474.916234 | 474.916234 | 474.916234 | 474.916234 | 474.916234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 445.016234 | 423.166234 | 415.913504 | 414.732011 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | 245.81118 | NA | 122.904924 | 122.895643 | 122.891704 | 122.847421 | 122.815636 | NA | NA | NA |
| us-gaap:PreferredStockSharesIssued | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | NA | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:CommonStockSharesAuthorized | █████████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁ | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 1200.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 600.0 | 300.0 | 300.0 | 300.0 | 300.0 | 300.0 | 300.0 | NA | NA | NA |
| us-gaap:CommonStockSharesOutstanding | █████▇▇▇▇▇▇▇▇▇▇▇▇▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁ | 445.817509 | 445.53418 | 444.872383 | 444.392615 | 444.196627 | 413.88272 | 413.23905 | 413.076116 | 412.964601 | 412.752687 | 411.532606 | 411.358838 | 411.17376 | 411.073529 | 388.703543 | 381.285028 | 380.004718 | 210.906018 | 210.681661 | 210.517586 | 210.418903 | 210.098753 | 209.731028 | 209.273336 | 208.976736 | 208.760251 | 208.322247 | 208.193467 | 207.999517 | 207.865891 | 206.618877 | 206.2732 | 206.190506 | 206.088765 | 204.935043 | 204.598717 | 205.041894 | 103.922403 | 103.25498 | 102.982759 | 103.526104 | 107.105747 | 106.815582 | NA | NA | NA |
| us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding | █▁ | 446.903 | 446.885 | NA | 445.51 | 420.116 | 415.348 | NA | 415.578 | 415.049 | 415.233 | NA | 414.847 | 414.641 | 412.173 | NA | 383.419 | 214.012 | 213.602 | NA | 212.87 | 212.618 | 211.071 | NA | 210.524 | 210.477 | 210.467 | NA | 210.759 | 210.516 | 210.166 | NA | 209.893 | 208.874 | 209.458 | NA | 209.96 | 0.211784 | 0.105926 | NA | 0.10597 | 0.10803 | 0.109179 | NA | 0.107651 | 0.107838 | 0.10741 |
| us-gaap:WeightedAverageNumberOfSharesOutstandingBasic | █▁ | 446.337 | 445.894 | NA | 445.103 | 419.722 | 414.282 | NA | 413.816 | 413.606 | 412.908 | NA | 412.117 | 411.946 | 409.676 | NA | 380.907 | 211.785 | 211.619 | NA | 211.309 | 211.075 | 210.781 | NA | 210.296 | 210.204 | 209.874 | NA | 209.489 | 209.403 | 209.13 | NA | 206.235 | 206.143 | 205.479 | NA | 205.005 | 0.207292 | 0.103809 | NA | 0.103303 | 0.105337 | 0.10702 | NA | 0.106443 | 0.106356 | 0.106132 |
| us-gaap:EarningsPerShareBasic | ▅▆▅▅▄▁▅▅▅▆▅▅▅▅▃▄▄▄▄▄▄▄▃▄▄▃▄▄▃▄▄▃▂▄▄▄▃▇▇▅▄▇▅▄▄█ | 0.77 | 0.87 | 0.69 | 0.7 | 0.32 | -0.34 | 0.77 | 0.75 | 0.75 | 0.82 | 0.71 | 0.76 | 0.68 | 0.65 | 0.16 | 0.43 | 0.34 | 0.41 | 0.42999999999999994 | 0.44 | 0.41 | 0.4 | 0.1299999999999999 | 0.39 | 0.36 | 0.29 | 0.44999999999999996 | 0.31 | 0.29 | 0.45 | 0.44000000000000006 | 0.3 | 0.0 | 0.55 | 0.54 | 0.32 | 0.29 | 1.18 | 1.1099999999999999 | 0.58 | 0.52 | 1.22 | 0.7799999999999998 | 0.52 | 0.39 | 1.46 |
| us-gaap:EarningsPerShareDiluted | ▅▆▅▅▄▁▅▅▅▆▅▅▅▅▃▄▄▄▄▄▄▄▃▄▄▃▄▄▃▄▄▄▂▄▄▄▃▇▇▅▄▇▅▄▄█ | 0.77 | 0.86 | 0.69 | 0.7 | 0.32 | -0.34 | 0.77 | 0.74 | 0.75 | 0.81 | 0.7 | 0.75 | 0.68 | 0.64 | 0.16 | 0.43 | 0.33 | 0.41 | 0.42999999999999994 | 0.43 | 0.4 | 0.4 | 0.11999999999999988 | 0.39 | 0.36 | 0.29 | 0.44999999999999996 | 0.31 | 0.29 | 0.45 | 0.43000000000000005 | 0.3 | 0.0 | 0.54 | 0.53 | 0.31 | 0.29 | 1.16 | 1.08 | 0.57 | 0.51 | 1.19 | 0.7600000000000002 | 0.51 | 0.39 | 1.44 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cost Ratio oke:RegulatedSegmentByName,us-gaap:StatementBusinessSegments oke:NaturalGasLiquidsRegulated,oke:NaturalGasLiquids | █▇▇▇▅▄▄▃▁▂▁▂▁▁▂▁▁▁▁▁▁▁ | 603.1 | 570.6 | 546.0 | 541.7 | 477.2 | 435.1 | 400.0 | 379.7 | 303.4 | 323.1 | 289.7 | 316.0 | 294.3 | 300.0 | 320.7 | 293.1 | 289.4 | 296.3 | 296.8 | 299.2 | 297.5 | 281.8 | NA | NA | 227.5 | 209.8 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Cost Ratio oke:RegulatedSegmentByName,us-gaap:StatementBusinessSegments oke:NaturalGasPipelinesRegulated,oke:NaturalGasPipelines | ▂█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁ | 69.4 | 181.4 | 72.9 | 71.8 | 79.9 | 73.9 | 70.6 | 72.3 | 72.3 | 70.1 | 68.2 | 65.9 | 64.5 | 68.0 | 67.6 | 65.6 | 62.8 | 68.9 | 66.3 | 61.0 | 56.6 | 54.8 | NA | NA | 64.1 | 54.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Cost Ratio us-gaap:StatementBusinessSegments oke:NaturalGasGatheringAndProcessing | █▇▅▃▁▃▅▃▄▆▇▇▆▆█▇▆▅▅▃▃▃ | 863.452 | 839.741 | 610.927 | 459.405 | 299.809 | 449.98 | 615.586 | 476.212 | 582.18 | 694.661 | 834.402 | 791.255 | 700.929 | 707.991 | 896.555 | 782.928 | 685.815 | 661.276 | 630.589 | 512.218 | 476.759 | 432.011 | NA | NA | 460.062 | 455.623 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Cost Ratio us-gaap:StatementBusinessSegments oke:NaturalGasLiquids | ▇▅▄▃▁▂▄▃▄▄▅▇▅▆█▅▄▅▄▃▃▂ | 2999.478 | 2610.065 | 2151.49 | 1832.217 | 1335.714 | 1770.592 | 2247.951 | 1900.507 | 2072.558 | 2311.5 | 2601.891 | 3026.288 | 2613.93 | 2692.469 | 3382.556 | 2501.979 | 2349.685 | 2391.984 | 2277.014 | 2039.257 | 1871.993 | 1487.39 | NA | NA | 1848.875 | 1496.092 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Cost Ratio us-gaap:StatementBusinessSegments oke:NaturalGasPipelines | ▂█▂▂▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁ | 112.444 | 248.814 | 119.845 | 117.296 | 122.058 | 120.783 | 116.508 | 121.548 | 117.531 | 116.4 | 116.838 | 105.194 | 99.792 | 109.911 | 108.827 | 106.438 | 97.849 | 106.818 | 113.242 | 92.077 | 88.069 | 85.973 | NA | NA | 80.112 | 83.549 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Cost Ratio us-gaap:StatementBusinessSegments oke:TotalSegments | ▇▆▄▃▁▃▄▃▄▅▆▇▅▆█▅▅▅▄▃▃▂ | 3975.374 | 3698.62 | 2882.262 | 2408.918 | 1757.581 | 2341.355 | 2980.045 | 2498.267 | 2772.269 | 3122.561 | 3553.131 | 3922.737 | 3414.651 | 3510.371 | 4387.938 | 3391.345 | 3133.349 | 3160.078 | 3020.845 | 2643.552 | 2436.821 | 2005.374 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TTM Greenblatt ROC _ _ | ██▇▇▅▁▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▅▅▄▅▅▄▃▄▅▄▄▅▅▄▄▅▄ | 611.512 | 664.721 | 538.663 | 550.433 | 355.73 | -83.469 | 487.314 | 482.151 | 476.146 | 468.742 | 471.865 | 495.534 | 448.366 | 419.699 | 397.836 | 351.906 | 316.733 | 314.42 | 329.6 | 329.357 | 315.285 | 311.434 | 242.017 | 284.935 | 272.744 | 196.463 | 306.747 | 291.392 | 251.315 | 294.117 | 294.621 | 230.081 | 128.183 | 273.849 | 299.586 | 242.913 | 234.079 | 325.922 | 363.079 | 248.881 | 216.917 | 330.036 | 241.068 | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:ComprehensiveIncomeNetOfTax | ▅█▆▆▅▁▇▆▆▆▆▇▆▇▄▅▄▅▄▄▄▄▄▄▄▄▄▄▄▄▅▄▄▅▅▄▄▅▄▄▄▅▄▄▄▅ | 206.292 | 472.029 | 287.198 | 306.601 | 108.804 | -267.243 | 367.355 | 224.447 | 245.091 | 255.923 | 262.787 | 333.71 | 277.151 | 316.447 | 56.286 | 160.056 | 74.958 | 102.649 | 90.506 | 97.039 | 61.312 | 76.074 | 34.385 | 81.379 | 81.063 | 57.261 | 65.847 | 69.929 | 58.376 | 102.2 | 188.242 | 54.834 | 12.102 | 106.166 | 135.22 | 30.383 | 34.198 | 150.141 | 83.453 | 17.014 | 59.013 | 103.795 | 64.54 | 68.513 | 43.803 | 167.588 |
| us-gaap:CostOfRevenue | ▅▄▃▂▁▂▃▂▃▄▅▅▄▅▇▅▄▄▄▃▃▂▂▂▃▂▅▆▅▆█▇▆▆▇▅▄▆▇▇▇▇▆▅▅▇ | 2366.979 | 2121.51 | 1627.086 | 1265.674 | 940.458 | 1276.928 | 1791.341 | 1414.528 | 1625.794 | 1956.377 | 2318.099 | 2560.765 | 2175.818 | 2368.026 | 3073.764 | 2229.416 | 2091.022 | 2143.843 | 2021.47 | 1751.593 | 1527.323 | 1195.738 | 1333.286 | 1360.809 | 1603.093 | 1343.864 | 2281.273 | 2583.204 | 2571.402 | 2652.669 | 3488.457 | 3010.737 | 2895.847 | 2917.993 | 3055.604 | 2474.803 | 1980.298 | 2771.013 | 3138.07 | 3061.198 | 2992.828 | 3233.339 | 2812.474 | 2491.333 | 2349.054 | 3304.648 |
| us-gaap:GainsLossesOnExtinguishmentOfDebt | NA | NA | 0.1 | 2.2 | 4.3 | 15.8 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | ▇█▇▇▅▁▇▇▇▇▇▇▇▆▆▆▅▅▅▅▅▅▃▅▅▄▆▄▅▅▅▅▄▅▅▅▅▆▆▅▅▆▅▄▄ | 452.208 | 508.308 | 403.236 | 418.871 | 177.461 | -197.252 | 418.431 | 406.52 | 410.898 | 415.142 | 389.506 | 416.899 | 369.71 | 341.82 | 316.181 | 263.659 | 219.835 | 241.126 | 249.631 | 249.804 | 232.544 | 225.977 | -13.627 | 202.996 | 199.242 | 133.265 | 256.769 | 152.31 | 191.073 | 219.721 | 239.217 | 187.147 | 80.857 | 233.122 | 254.235 | 207.572 | 189.35 | 293.289 | 333.67 | 194.634 | 170.931 | 282.605 | 202.059 | 150.266 | 117.422 | NA |
| us-gaap:IncomeTaxExpenseBenefit | ▅▅▄▅▃▁▅▄▅▄▄▅▄▄█▄▃▄▄▄▃▃▃▃▃▃▄▃▃▃▄▃▂▄▄▃▃▄▄▃▃▄▄▃▃▄ | 110.069 | 122.132 | 95.207 | 106.555 | 43.14 | -55.395 | 98.18 | 97.365 | 98.935 | 77.934 | 96.618 | 102.983 | 87.531 | 75.771 | 251.369 | 97.128 | 43.844 | 54.941 | 54.87 | 55.012 | 52.458 | 50.066 | 12.652 | 38.298 | 48.222 | 37.428 | 56.003 | 37.858 | 42.313 | 14.984 | 55.154 | 39.449 | 1.362 | 67.417 | 58.36 | 42.584 | 40.412 | 73.839 | 71.148 | 33.754 | 36.165 | 84.981 | 55.51 | 29.965 | 31.048 | 97.311 |
| us-gaap:InterestExpense | ▆▆▆▆█▄▄▄▃▃▃▃▃▃▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▂▁▁▁▁ | 184.957 | 185.523 | 176.931 | 176.371 | 218.968 | 140.616 | 129.283 | 129.577 | 117.493 | 115.42 | 118.489 | 121.91 | 113.496 | 115.725 | 124.19 | 126.533 | 118.473 | 116.462 | 114.188 | 118.24 | 118.976 | 118.247 | 110.73 | 106.923 | 102.384 | 96.75 | 86.459 | 86.052 | 88.751 | 94.901 | 90.13 | 81.908 | 81.731 | 80.437 | 83.591 | 71.364 | 71.535 | 75.815 | 68.318 | 73.841 | 75.498 | 79.349 | 69.451 | 70.907 | 75.361 | 76.52 |
| us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic | ▇█▇▇▅▁▇▇▇▇▇▇▇▆▄▅▄▄▄▄▄ | 341.864 | 385.901 | 307.754 | 312.041 | 134.046 | -142.132 | 319.976 | 308.88 | 311.688 | 336.933 | 292.613 | 312.984 | 280.773 | 264.233 | 62.771 | 165.466 | 71.476 | 87.361 | 90.505 | 92.144 | 85.944 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss | ██▇▇▅▁▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▅▅▄▅▅▄▃▄▅▄▄▅▅▄▄▅▄▄▃▅ | 611.512 | 664.721 | 538.663 | 550.433 | 355.73 | -83.469 | 487.314 | 482.151 | 476.146 | 468.742 | 471.865 | 495.534 | 448.366 | 419.699 | 397.836 | 351.906 | 316.733 | 314.42 | 329.6 | 329.357 | 315.285 | 311.434 | 242.017 | 284.935 | 272.744 | 196.463 | 306.747 | 291.392 | 251.315 | 294.117 | 294.621 | 230.081 | 128.183 | 273.849 | 299.586 | 242.913 | 234.079 | 325.922 | 363.079 | 248.881 | 216.917 | 330.036 | 241.068 | 186.904 | 178.713 | 337.332 |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax | ▁█▄▅▄▁▇▃▃▃▄▆▅▇▅▅▅▆▇▅▃▄▅▅▅▅▄▅▅▅█▅▆▅▆▃▄▆ | -135.847 | 85.853 | -20.831 | -5.715 | -25.517 | -125.386 | 47.104 | -84.708 | -66.872 | -81.285 | -30.101 | 20.451 | -3.897 | 51.939 | -6.759 | -5.686 | 5.474 | 44.105 | 47.174 | 11.273 | -85.139 | -28.783 | 9.43 | 2.022 | 6.655 | -18.625 | -23.764 | 11.643 | -19.413 | -8.624 | 96.566 | -9.486 | 43.285 | -13.881 | 19.588 | -57.044 | -41.071 | 40.84 | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome | ▁█ | -135.847 | 85.853 | NA | -5.715 | -25.517 | -125.386 | 47.104 | -84.708 | -66.872 | -81.285 | -30.101 | 20.451 | -3.897 | 51.939 | -6.759 | -5.686 | 3.265 | 15.288 | 0.001 | 4.895 | -24.632 | -7.372 | 8.87 | -0.778 | 4.558 | -3.539 | -28.697 | 5.471 | -3.214 | 8.685 | 97.505 | -7.522 | 11.183 | -6.355 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:PreferredStockDividendsIncomeStatementImpact | ████████████████▇▁▁▁▁ | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.275 | 0.274 | 0.276 | 0.217 | 0.0 | 0.0 | 0.0 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss | ▇█▇▇▅▁▇▇▇▇▇▇▇▆▄▅▅▅▅▅▅▅▃▅▅▄▆▄▅▆▅▅▄▅▅▅▅▆▆▅▅▆▅▄▄▅ | 342.139 | 386.176 | 308.029 | 312.316 | 134.321 | -141.857 | 320.251 | 309.155 | 311.963 | 337.208 | 292.888 | 313.916 | 282.179 | 266.049 | 64.812 | 166.531 | 175.991 | 186.185 | 194.465 | 194.216 | 179.859 | 174.959 | -28.216 | 160.838 | 150.88 | 95.693 | 201.565 | 114.281 | 140.751 | 206.511 | 184.063 | 147.698 | 79.495 | 165.705 | 195.875 | 164.988 | 149.205 | 233.462 | 264.751 | 160.88 | 134.766 | 199.346 | 147.935 | 120.301 | 86.374 | 186.72 |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:NaturalGasGatheringAndProcessing | ▂▁▁▄▄▅▅██▆▆▇█▅ | 34.139 | 31.687 | 31.598 | 36.459 | 35.949 | 37.937 | 38.226 | 42.795 | 43.536 | 39.742 | 40.863 | 41.101 | 42.801 | 38.429 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:NaturalGasLiquids | █▅▆█▆▆▄▄▄▃▅▆▃▁ | 129.624 | 113.231 | 117.654 | 132.21 | 118.174 | 120.536 | 104.667 | 105.179 | 105.858 | 98.534 | 108.336 | 116.833 | 96.47 | 83.258 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:TotalSegments | ▇▄▅█▆▆▄▅▅▃▅▆▄▁ | 163.763 | 144.918 | 149.252 | 168.669 | 154.123 | 158.473 | 142.893 | 147.974 | 149.394 | 138.276 | 149.199 | 157.934 | 139.271 | 121.687 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:NaturalGasGatheringAndProcessing | █▇▄▃▁▃▄▃▄▄▆▇▆▆ | 566.383 | 491.807 | 320.08 | 239.81 | 109.581 | 219.917 | 334.357 | 244.932 | 312.757 | 332.332 | 413.832 | 501.163 | 447.839 | 413.157 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:NaturalGasLiquids | █▆▄▃▁▃▅▃▄▅▆█▆▇ | 2829.604 | 2414.83 | 1979.918 | 1658.123 | 1174.58 | 1596.711 | 2084.536 | 1746.63 | 1921.564 | 2158.103 | 2435.664 | 2861.896 | 2469.517 | 2552.77 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:TotalSegments | █▆▄▃▁▃▅▃▄▅▆█▆▇ | 3395.987 | 2906.637 | 2299.998 | 1897.933 | 1284.161 | 1816.628 | 2418.893 | 1991.562 | 2234.321 | 2490.435 | 2849.496 | 3363.059 | 2917.356 | 2965.927 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:NaturalGasGatheringAndProcessing | ▄▆▄▂▁▂▄▂▃▆█▄▃▄ | 257.802 | 312.247 | 253.051 | 178.492 | 150.892 | 189.051 | 240.477 | 185.303 | 221.333 | 319.036 | 375.073 | 245.474 | 208.618 | 254.997 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:NaturalGasPipelines | ▁█▁▁▁▁▁▁▁▁▁▁▁▁ | 0.004 | 115.455 | 2.66 | 3.998 | 0.0 | 2.035 | 0.002 | 0.231 | 0.041 | 0.97 | 3.911 | 0.763 | 0.179 | 4.919 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:TotalSegments | ▄█▄▂▁▂▃▂▃▅▇▃▂▄ | 257.806 | 427.702 | 255.711 | 182.49 | 150.892 | 191.086 | 240.479 | 185.534 | 221.374 | 320.006 | 378.984 | 246.237 | 208.797 | 259.916 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:NaturalGasLiquids | ▁▅▆▂▂▆█▄▃▇█▄▄▇ | 37.864 | 48.728 | 51.505 | 39.774 | 40.881 | 50.755 | 56.099 | 46.407 | 42.655 | 52.322 | 55.277 | 45.251 | 45.012 | 53.478 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:NaturalGasPipelines | ▃▆▄▃▅▄█▃▃▂▂▂▁▂ | 112.337 | 132.947 | 116.909 | 113.047 | 121.777 | 118.364 | 148.711 | 108.384 | 105.701 | 103.47 | 104.368 | 98.031 | 93.277 | 98.338 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:TotalSegments | ▂▆▄▃▄▄█▃▂▃▃▂▁▂ | 150.201 | 181.675 | 168.414 | 152.821 | 162.658 | 169.119 | 204.81 | 154.791 | 148.356 | 155.792 | 159.645 | 143.282 | 138.289 | 151.816 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:Revenues | ▆▅▄▂▁▂▄▃▃▄▅▆▅▅▇▅▄▄▄▃▂▁▂▂▂▁▄▅▅▅█▆▆▆▇▅▃▆█▆▆▇▆▅▄▇ | 3388.964 | 3194.679 | 2570.577 | 2174.264 | 1660.729 | 2136.672 | 2663.606 | 2263.228 | 2457.575 | 2779.958 | 3136.7 | 3393.89 | 2960.529 | 3102.077 | 3792.158 | 2906.366 | 2725.772 | 2749.611 | 2654.461 | 2357.907 | 2134.107 | 1774.459 | 1930.902 | 1898.946 | 2128.052 | 1805.306 | 2844.768 | 3120.145 | 3066.882 | 3163.296 | 4140.111 | 3571.925 | 3349.236 | 3541.445 | 3659.924 | 3028.775 | 2529.26 | 3414.6 | 4071.037 | 3595.191 | 3514.476 | 3866.888 | 3280.05 | 2942.703 | 2807.131 | 3923.967 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
|---|
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:Assets | █████▇▇▇▆▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▅▄▃▃▃▃▂▂▂▂▂▂▁▁▁ | 23437.248 | 23179.929 | 23078.754 | 22780.876 | 22992.467 | 21969.44 | 21812.121 | 21335.907 | 19751.594 | 18934.325 | 18231.671 | 17911.314 | 16913.72 | 16432.347 | 16845.937 | 16764.841 | 16672.923 | 16067.558 | 16138.751 | 15982.035 | 15822.9 | 15501.149 | 15446.111 | 15508.298 | 15651.18 | 15533.073 | 15304.56 | 14312.196 | 14384.538 | 13653.134 | 17707.558 | 17610.343 | 15842.274 | 15446.219 | 15855.275 | 15364.307 | 13817.191 | 14252.076 | 13696.635 | 13171.124 | 13036.333 | 13039.596 | 12499.175 | 11929.753 | 12119.911 | NA |
| us-gaap:LiabilitiesAndStockholdersEquity | █████▇▇▇▆▅▅▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▂▂▂▄▄▃▃▃▃▂▂▂▁▁▁▁ | 23437.248 | 23179.929 | 23078.754 | 22780.876 | 22992.467 | 21969.44 | 21812.121 | 21335.907 | 19751.594 | 18934.325 | 18231.671 | 17911.314 | 16913.72 | 16432.347 | 16845.937 | 16764.841 | 16672.923 | 16067.558 | 16138.751 | 15982.035 | 15822.9 | 15501.149 | 15446.111 | 15508.298 | 15651.18 | 15533.073 | 15304.56 | 14312.196 | 14384.538 | 13653.134 | 17707.558 | 17610.343 | 15842.274 | 15446.219 | 15855.275 | 15364.307 | 13817.191 | 14252.076 | 13696.635 | 13171.124 | 13036.333 | 13039.596 | 12499.175 | NA | NA | NA |
| us-gaap:StockholdersEquity | ▇▇▇▇█▇▇▇██████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▂▁▃▃▃▃▃▃▃▃▃▃▃▃▃ | 5910.386 | 6096.965 | 6042.398 | 6146.112 | 6240.652 | 5560.641 | 6225.951 | 6218.906 | 6348.136 | 6442.006 | 6579.543 | 6652.758 | 6664.86 | 6701.446 | 5527.867 | 5359.495 | 5407.747 | 238.382 | 188.745 | 214.296 | 237.429 | 286.888 | 335.798 | 414.472 | 517.508 | 530.158 | 592.115 | 623.232 | 656.425 | 584.5 | 2337.851 | 2189.694 | 2085.349 | 2134.354 | 2129.609 | 2065.706 | 2089.54 | 2256.152 | 2238.573 | 2185.96 | 2217.089 | 2499.084 | 2448.623 | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AssetsCurrent | ▅▅▄▄▅▃▃▅▃▂▃▄▃▂▄▃▃▂▃▂▂▁▁▁▂▂▂▄▅▃▆█▄▄▇█▄▇▆▆▇▇▆ | 2235.623 | 1997.594 | 1869.775 | 1721.362 | 2179.859 | 1488.282 | 1470.334 | 1967.585 | 1401.17 | 1342.779 | 1398.632 | 1807.908 | 1433.687 | 1290.745 | 1764.458 | 1518.865 | 1447.811 | 1378.447 | 1429.684 | 1369.291 | 1281.188 | 991.021 | 975.21 | 952.79 | 1263.796 | 1321.949 | 1307.244 | 1712.787 | 2059.655 | 1656.327 | 2370.802 | 2882.024 | 1889.589 | 1949.663 | 2764.66 | 2956.03 | 1807.319 | 2609.275 | 2318.812 | 2312.043 | 2529.261 | 2795.774 | 2379.045 | NA | NA | NA |
| us-gaap:CashAndCashEquivalentsAtCarryingValue | ▄▄▅▄█▅▁▆▃▁▁▂▁▁▁▁▃▃▃▃▂▂▂▁▃▃▂▂▄▂▂▇▁▂▅█▂▇▁▂▄▇▁▁▂▂ | 374.377 | 402.413 | 524.496 | 447.129 | 945.732 | 531.63 | 20.958 | 673.309 | 273.397 | 27.814 | 11.975 | 84.464 | 15.295 | 17.474 | 37.193 | 11.676 | 332.371 | 310.808 | 248.875 | 237.41 | 180.854 | 137.219 | 97.619 | 38.371 | 226.193 | 239.411 | 172.812 | 151.403 | 358.56 | 210.227 | 149.313 | 779.524 | 33.681 | 143.947 | 583.618 | 978.825 | 114.92 | 781.192 | 65.953 | 148.407 | 477.573 | 870.086 | 31.034 | 50.483 | 103.251 | 167.433 |
| us-gaap:ReceivablesNetCurrent | ▅▄▃▂▂▁▃▂▂▃▃▅▄▃▆▄▃▃▃▃▂▁▂▂▂▂▃▄▅▄█▅▅▆▇▄▃▅▇▅▅▆▇ | 1091.982 | 909.972 | 829.796 | 717.852 | 608.923 | 497.556 | 835.121 | 718.708 | 669.289 | 812.869 | 818.958 | 1085.075 | 934.664 | 844.218 | 1202.951 | 939.595 | 749.345 | 734.844 | 872.43 | 737.224 | 672.059 | 521.436 | 593.979 | 586.157 | 684.899 | 628.064 | 745.494 | 971.285 | 1097.008 | 883.673 | 1549.563 | 1166.994 | 1158.738 | 1261.804 | 1349.371 | 984.724 | 793.842 | 1154.951 | 1339.933 | 1141.132 | 1125.338 | 1280.125 | 1332.726 | NA | NA | NA |
| us-gaap:InventoryNet | ▅▄▂▃▂▁▃▃▂▂▃▅▃▂▄▃▂▂▁▂▂▁▁▁▁▂▁▄▃▂▄▇▅▃▆▇▆▃▆▇▆▄█ | 454.76 | 369.604 | 227.81 | 300.577 | 201.883 | 131.041 | 304.926 | 283.545 | 184.95 | 243.223 | 296.667 | 426.293 | 285.776 | 185.298 | 342.293 | 314.266 | 200.133 | 193.339 | 140.034 | 217.769 | 245.946 | 156.075 | 128.084 | 142.308 | 150.137 | 218.691 | 134.134 | 338.345 | 335.116 | 231.237 | 417.077 | 664.213 | 434.996 | 302.473 | 517.014 | 644.719 | 561.802 | 299.13 | 549.915 | 658.059 | 574.173 | 407.671 | 708.933 | NA | NA | NA |
| us-gaap:OtherAssetsCurrent | ▅▅▅▃▃▂▃▃▂▂▃▂▂▄▂▂▁▄▁▁▂▂▁▂▆▆▆▄▄▃▆▆▆▅▆██▅▇▇▆▄▅ | 154.807 | 155.224 | 132.536 | 83.565 | 92.302 | 59.116 | 82.313 | 79.763 | 69.596 | 56.793 | 100.808 | 61.34 | 57.286 | 106.067 | 53.008 | 64.196 | 51.465 | 108.552 | 45.986 | 50.759 | 58.2 | 54.024 | 39.946 | 76.129 | 155.967 | 175.425 | 173.299 | 119.427 | 118.545 | 102.089 | 171.018 | 160.452 | 163.055 | 154.154 | 175.869 | 220.135 | 208.704 | 155.695 | 185.143 | 202.26 | 161.54 | 106.699 | 149.558 | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:PropertyPlantAndEquipmentGross | █████▇▇▇▆▆▅▅▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▄▄▃▃▃▂▂▂▂▁▁▁▁ | 23393.034 | 23192.548 | 23072.935 | 22803.167 | 22622.747 | 22136.442 | 22051.492 | 20948.267 | 19806.759 | 18887.742 | 18030.963 | 17120.187 | 16363.716 | 15838.443 | 15559.667 | 15364.289 | 15241.14 | 15154.36 | 15078.497 | 14943.225 | 14811.606 | 14671.934 | 14530.46 | 14457.28 | 14175.037 | 13908.362 | 13602.647 | 12173.835 | 11737.291 | 11313.498 | 15536.156 | 14944.162 | 14085.131 | 13560.483 | 13088.991 | 12404.878 | 11953.916 | 11495.219 | 11177.934 | 10709.417 | 10350.552 | 10036.44 | 9854.485 | NA | NA | NA |
| us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | ██▇▇▆▆▇▆▆▆▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁▁▅▅▅▅▄▄▄▄▄▄▃▃▃ | 4211.515 | 4067.297 | 3918.007 | 3773.852 | 3641.574 | 3506.95 | 3702.807 | 3585.411 | 3470.52 | 3369.71 | 3264.312 | 3159.66 | 3059.799 | 2960.254 | 2861.541 | 2785.682 | 2694.148 | 2600.776 | 2507.094 | 2416.476 | 2326.984 | 2234.807 | 2156.471 | 2178.687 | 2099.187 | 2017.041 | 1940.21 | 1931.713 | 1866.627 | 1802.704 | 3238.652 | 3173.366 | 3105.646 | 3039.265 | 2974.651 | 2914.496 | 2855.863 | 2794.183 | 2733.601 | 2690.104 | 2637.978 | 2597.547 | 2541.302 | NA | NA | NA |
| us-gaap:PropertyPlantAndEquipmentNet | ███████▇▆▆▅▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▂▄▄▃▃▃▂▂▂▂▁▁▁▁ | 19181.519 | 19125.251 | 19154.928 | 19029.315 | 18981.173 | 18629.492 | 18348.685 | 17362.856 | 16336.239 | 15518.032 | 14766.651 | 13960.527 | 13303.917 | 12878.189 | 12698.126 | 12578.607 | 12546.992 | 12553.584 | 12571.403 | 12526.749 | 12484.622 | 12437.127 | 12373.989 | 12278.593 | 12075.85 | 11891.321 | 11662.437 | 10242.122 | 9870.664 | 9510.794 | 12297.504 | 11770.796 | 10979.485 | 10521.218 | 10114.34 | 9490.382 | 9098.053 | 8701.036 | 8444.333 | 8019.313 | 7712.574 | 7438.893 | 7313.183 | NA | NA | NA |
| us-gaap:Goodwill | NA | NA | 527.592 | 527.592 | 527.592 | 527.592 | 680.996 | NA | NA | NA | 681.1 | NA | NA | NA | 681.1 | NA | NA | NA | 525.535 | NA | NA | NA | 525.535 | NA | NA | NA | 525.535 | NA | NA | NA | 683.488 | NA | NA | NA | 591.488 | NA | NA | NA | 601.743 | NA | NA | NA | 602.844 | NA | NA | NA | |
| us-gaap:Goodwill oke:ReportableSegmentByName oke:NaturalGasLiquids | NA | NA | NA | 371.217 | 371.217 | 371.217 | 371.217 | NA | NA | NA | 371.217 | NA | NA | NA | 371.217 | NA | NA | NA | 268.544 | NA | NA | NA | 268.544 | NA | NA | NA | 268.544 | NA | NA | NA | 268.544 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:Goodwill oke:ReportableSegmentByName oke:NaturalGasPipelines | NA | NA | NA | 156.375 | 156.375 | 156.375 | 156.375 | NA | NA | NA | 156.479 | NA | NA | NA | 156.479 | NA | NA | NA | 134.7 | NA | NA | NA | 134.7 | NA | NA | NA | 134.7 | NA | NA | NA | 134.7 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:IntangibleAssetsNetExcludingGoodwill | NA | NA | 246.131 | NA | NA | NA | 276.837 | NA | NA | NA | 286.042 | NA | NA | NA | 312.36 | NA | NA | NA | 479.824 | NA | NA | NA | 491.723 | NA | NA | NA | 489.205 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:IntangibleAssetsNetIncludingGoodwill | ▁▁▁▁▁▁▄▄▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅█▅▅ | 768.509 | 771.116 | 773.723 | 776.33 | 778.937 | 781.544 | 957.833 | 960.808 | 963.783 | 964.167 | 967.142 | 970.117 | 987.51 | 990.485 | 993.46 | 996.435 | 999.409 | 1002.384 | 1005.359 | 1008.334 | 1011.309 | 1014.284 | 1017.258 | 1020.233 | 1023.209 | 1011.765 | 1014.74 | 1017.715 | 1018.679 | 1021.62 | 1182.515 | 990.456 | 992.373 | NA | 996.206 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingLeaseRightOfUseAsset oke:LeaseDescription oke:CertainOperatingLeasesEnteredIntoDuringThePeriod | NA | NA | NA | 16.2 | 16.6 | 17.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OperatingLeaseRightOfUseAsset oke:LeaseDescription oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet | NA | NA | 100.154 | NA | NA | NA | 15.147 | 16.176 | 17.406 | 16.374 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OperatingLeaseRightOfUseAsset oke:LeaseDescription oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember | NA | NA | 69.0 | 70.7 | 72.3 | 74.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherAssetsNoncurrent | ▅▅▅▅▃▃▂▂▂▁▁▂▂▁▂▂▂▂▂▁▁▁▁▁▁▂▂▂▂▂▆████▇▇▇▇▆▆▆▆ | 451.246 | 478.247 | 475.296 | 463.496 | 262.463 | 259.643 | 173.425 | 174.147 | 169.318 | 158.423 | 130.096 | 191.17 | 170.124 | 159.428 | 180.83 | 182.265 | 170.785 | 176.755 | 162.998 | 121.529 | 118.98 | 112.614 | 112.598 | 115.716 | 129.7 | 167.724 | 167.466 | 184.935 | 193.032 | 202.626 | 626.899 | 765.194 | 772.04 | 760.92 | 758.664 | 701.491 | 701.512 | 720.174 | 695.965 | 575.095 | 588.886 | 595.649 | 594.008 | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AccountsPayableCurrent | ▅▄▂▂▃▃▆▅▄▅▅▇▅▃▅▄▂▂▄▂▂▁▂▂▂▂▄▆▆▆█▇▆▆▇▆▄▅▇▆▆▅▆ | 1052.561 | 929.771 | 719.302 | 624.483 | 755.474 | 742.369 | 1209.9 | 1129.849 | 907.377 | 1027.322 | 1118.102 | 1339.507 | 1027.467 | 773.054 | 1140.571 | 922.82 | 696.834 | 703.278 | 874.731 | 711.817 | 697.833 | 522.317 | 615.982 | 620.568 | 694.914 | 721.535 | 891.413 | 1221.934 | 1271.539 | 1155.114 | 1503.699 | 1382.785 | 1214.322 | 1205.248 | 1333.489 | 1153.75 | 911.977 | 1110.108 | 1341.718 | 1241.633 | 1194.103 | 1131.922 | 1215.468 | NA | NA | NA |
| us-gaap:ContractWithCustomerLiabilityCurrent | █▃▅▆▇▂▅▆▇▂▃▅▆▁ | 35.6 | 15.9 | 23.7 | 27.6 | 31.3 | 11.9 | 22.2 | 25.2 | 30.4 | 10.6 | 15.6 | 23.8 | 27.8 | 6.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LiabilitiesCurrent | ▅▄▂▁▂▁▄▃▃▃▄▅▆▄▆▆▇▆▇▅▅▃▃▄▆▆▅▃▃▄▆▆▆▅▇▅▅▆█▇▇▅█ | 2394.601 | 2047.954 | 1344.547 | 1094.142 | 1273.102 | 1091.392 | 2020.298 | 1567.152 | 1737.373 | 1689.669 | 2108.436 | 2450.206 | 2572.081 | 2050.838 | 2667.335 | 2741.08 | 2860.519 | 2731.974 | 2836.701 | 2341.964 | 2188.421 | 1764.46 | 1638.266 | 1960.821 | 2606.562 | 2548.72 | 2392.345 | 1781.901 | 1851.171 | 1891.724 | 2696.407 | 2621.71 | 2648.779 | 2337.025 | 2812.994 | 2439.113 | 2256.677 | 2600.323 | 3246.175 | 2976.764 | 2840.617 | 2301.648 | 3151.112 | NA | NA | NA |
| us-gaap:LongTermDebtCurrent | ▅▅▁▁▁▁▁▁▃▃▅▅██▄▄▅▄▄▄▄▄▂▆▆▆▁▁▁▁▁▁▁▁▁▁▁▄▄▄▄▄▆ | 536.107 | 543.757 | 7.65 | 7.65 | 7.65 | 7.65 | 7.65 | 7.65 | 307.65 | 307.65 | 507.65 | 507.65 | 932.65 | 932.65 | 432.65 | 432.65 | 494.703 | 410.65 | 410.65 | 460.65 | 460.65 | 460.65 | 110.65 | 660.65 | 660.65 | 660.65 | 10.65 | 10.65 | 10.65 | 10.65 | 10.656 | 10.656 | 10.685 | 10.771 | 10.855 | 11.14 | 12.262 | 364.397 | 364.391 | 365.253 | 368.248 | 418.242 | 643.236 | NA | NA | NA |
| us-gaap:OperatingLeaseLiabilityCurrent | █▇▇▇▇▇▁ | 14.57 | 13.408 | 13.61 | 13.646 | 13.564 | 13.425 | 1.883 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherLiabilitiesCurrent | ▃▂▁▁▁▁▅▂▄▂▄▃▃▂▃▃▃▂▃▄▃▂▂▂▄▃▅▂▃▂▇█▇▆▆▆▇▇▆▆▇██ | 208.064 | 145.249 | 83.032 | 78.124 | 93.041 | 89.897 | 285.569 | 123.146 | 252.991 | 119.176 | 211.11 | 208.312 | 184.127 | 122.922 | 179.971 | 166.825 | 167.937 | 122.624 | 166.042 | 214.662 | 202.954 | 126.549 | 132.556 | 157.705 | 256.201 | 208.211 | 285.435 | 120.162 | 190.289 | 127.697 | 401.422 | 433.055 | 388.954 | 357.88 | 369.054 | 358.253 | 396.964 | 410.399 | 345.383 | 352.52 | 392.865 | 450.051 | 424.259 | NA | NA | NA |
| us-gaap:TaxesPayableCurrent | ▆▂▆█▄▁▃▄ | 94.048 | 65.862 | 89.428 | 103.778 | 77.752 | 61.057 | 75.422 | 79.358 | NA | NA | 61.337 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:LongTermDebt | ██████▆▆▅▄▄▃▂▂▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁ | 14200.0 | 14200.0 | 14200.0 | 14300.0 | 14300.0 | 14200.0 | 12500.0 | 12500.0 | 11100.0 | 10300.0 | 9400.0 | 8800.0 | 8000.0 | 8000.0 | 8500.0 | 8500.0 | 8300.0 | 8300.0 | 8300.0 | 8800.0 | 8800.0 | 8800.0 | 8400.0 | 8400.0 | 8000.0 | 8000.0 | 7200.0 | 7200.0 | 7200.0 | 7200.0 | 7800.0 | 7800.0 | 6500.0 | NA | 6500.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LongTermDebtNoncurrent | ██████▇▇▆▅▄▄▃▃▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▄▄▃▃▃▃▂▂▂▂▂▂▁ | 13637.581 | 13638.767 | 14228.421 | 14249.339 | 14276.232 | 14146.65 | 12479.757 | 12479.452 | 10754.087 | 10004.341 | 8873.334 | 8325.708 | 7091.246 | 7091.751 | 8091.629 | 8092.0 | 7835.606 | 7919.826 | 7919.996 | 8320.144 | 8320.277 | 8320.451 | 8323.582 | 7773.756 | 7291.4 | 7339.766 | 7192.929 | 7194.957 | 7196.988 | 7199.029 | 7754.975 | 7757.159 | 6511.359 | 6513.327 | 6515.372 | 6517.464 | 5224.623 | 5225.849 | 4529.551 | 4532.053 | 4622.616 | 4976.458 | 3686.542 | NA | NA | NA |
| us-gaap:DeferredTaxLiabilitiesNoncurrent | ▄▄▃▃▃▂▃▂▂▂▂▁▁▁▁▁▁▇▇▇▆▆▆▆▆▆▆▆▅▅█▇▇▇▇▇▆▆▆▆▆▅▅ | 881.711 | 814.528 | 669.697 | 582.334 | 475.904 | 442.653 | 536.063 | 418.736 | 347.831 | 270.751 | 219.731 | 132.242 | 54.726 | 53.805 | 52.697 | 76.262 | 73.983 | 1612.039 | 1623.822 | 1573.95 | 1518.328 | 1484.745 | 1436.715 | 1437.087 | 1451.833 | 1430.478 | 1395.222 | 1303.548 | 1253.099 | 1144.348 | 1938.262 | 1776.949 | 1716.547 | 1678.887 | 1592.802 | 1539.96 | 1457.896 | 1408.42 | 1446.591 | 1386.959 | 1288.438 | 1223.25 | 1171.997 | NA | NA | NA |
| us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:OtherPostretirementBenefitPlansDefinedBenefit | NA | NA | 33.641 | NA | NA | NA | 13.249 | NA | NA | NA | 16.04 | NA | NA | NA | 23.805 | NA | NA | NA | 25.273 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:PensionPlansDefinedBenefit | NA | NA | 199.301 | NA | NA | NA | 183.441 | NA | NA | NA | 171.796 | NA | NA | NA | 171.063 | NA | NA | NA | 162.352 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherLiabilitiesNoncurrent | ▅▄▇▆▆▆▅▆▅▄▄▃▃▃▂▂▂▂▂▂▂▂▁▂▂▂▂▁▁▁▄██▇▇▇▇▆▇▆▅▅▅ | 531.262 | 496.42 | 706.081 | 618.143 | 632.861 | 631.673 | 525.756 | 626.86 | 538.873 | 501.783 | 450.627 | 350.4 | 357.184 | 366.701 | 348.924 | 339.116 | 337.584 | 334.206 | 321.846 | 296.751 | 293.153 | 273.07 | 264.248 | 278.731 | 276.897 | 290.422 | 281.757 | 229.28 | 237.468 | 229.277 | 472.734 | 763.879 | 791.233 | 712.847 | 701.657 | 692.211 | 672.007 | 638.029 | 674.586 | 592.153 | 584.552 | 575.068 | 566.462 | NA | NA | NA |
| us-gaap:OperatingLeaseLiabilityNoncurrent | ▇▇▇███▁ | 81.707 | 85.295 | 87.61 | 90.806 | 93.716 | 96.431 | 13.509 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilities | NA | NA | 15.1 | 16.4 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilities | NA | NA | 13.8 | 15.1 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilities | NA | NA | 12.5 | 13.8 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilities | NA | NA | 11.1 | 12.5 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilities | NA | NA | 47.1 | 58.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:StockholdersEquity | ▇▇▇▇█▇▇▇██████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▂▁▃▃▃▃▃▃▃▃▃▃▃▃▃ | 5910.386 | 6096.965 | 6042.398 | 6146.112 | 6240.652 | 5560.641 | 6225.951 | 6218.906 | 6348.136 | 6442.006 | 6579.543 | 6652.758 | 6664.86 | 6701.446 | 5527.867 | 5359.495 | 5407.747 | 238.382 | 188.745 | 214.296 | 237.429 | 286.888 | 335.798 | 414.472 | 517.508 | 530.158 | 592.115 | 623.232 | 656.425 | 584.5 | 2337.851 | 2189.694 | 2085.349 | 2134.354 | 2129.609 | 2065.706 | 2089.54 | 2256.152 | 2238.573 | 2185.96 | 2217.089 | 2499.084 | 2448.623 | NA | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | NA | NA | 6042.398 | NA | NA | NA | 6225.951 | 6218.906 | 6348.136 | 6442.006 | 6579.543 | 6652.758 | 6838.483 | 6869.252 | 5685.352 | 5516.383 | 5565.231 | 3469.513 | 3428.915 | 3440.214 | 3492.177 | 3645.507 | 3766.336 | 4037.305 | 3999.359 | 3893.288 | 4005.883 | 3759.395 | 3793.331 | 3127.707 | 4845.18 | 4690.646 | 4174.356 | 4204.133 | 4232.45 | 4175.559 | 4205.988 | 4379.455 | 3799.732 | 3682.06 | 3697.704 | 3957.018 | 3920.841 | 3895.395 | 3870.574 | 3879.641 | |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome | NA | NA | -551.449 | NA | NA | NA | -374.0 | -421.104 | -336.396 | -269.524 | -188.239 | -158.138 | -178.589 | -174.692 | -188.53 | -181.771 | -176.085 | -139.062 | -154.35 | -154.351 | -159.246 | -134.614 | -127.242 | -136.112 | -135.334 | -139.892 | -136.353 | -107.656 | -113.127 | -109.913 | -121.987 | -219.492 | -211.97 | -223.153 | -216.798 | -240.476 | -205.64 | -178.845 | -206.121 | -174.573 | -131.266 | -135.137 | -108.802 | NA | NA | NA | |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital | NA | NA | 7353.396 | NA | NA | NA | 7403.895 | NA | NA | NA | 7615.138 | 7662.673 | 7699.934 | 7735.173 | 6588.878 | 6418.038 | 6463.13 | 1232.069 | 1234.314 | 1264.041 | 1294.583 | 1327.551 | 1378.444 | 1477.631 | 1564.316 | 1537.166 | 1541.583 | 1515.158 | 1503.582 | 1377.023 | 1433.6 | 1404.086 | 1278.213 | 1267.735 | 1324.698 | 1337.045 | 1326.204 | 1317.489 | 1418.414 | 1404.087 | 1396.042 | 1384.287 | 1392.671 | NA | NA | NA | |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:CommonStock | NA | NA | 4.749 | NA | NA | NA | 4.45 | NA | NA | NA | 4.45 | 4.45 | 4.45 | 4.45 | 4.232 | 4.159 | 4.147 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 1.229 | 1.229 | 1.229 | 1.229 | 1.228 | 1.228 | NA | NA | NA | |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:TreasuryStock | NA | NA | -764.298 | NA | NA | NA | -808.394 | -812.539 | -815.376 | -820.767 | -851.806 | -856.227 | -860.935 | -863.485 | -876.713 | -880.931 | -883.445 | -887.97 | -893.677 | -897.852 | -900.366 | -908.507 | -917.862 | -929.505 | -937.051 | -942.55 | -953.701 | -956.977 | -961.911 | -965.31 | -997.035 | -1005.829 | -1007.834 | -1010.45 | -1039.773 | -1048.329 | -1050.942 | -903.585 | -935.323 | -947.839 | -949.632 | -652.573 | -663.274 | NA | NA | NA | |
| us-gaap:CommonStockValue | █████▇▇▇▇▇▇▇▇▇▇▇▇▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁ | 4.749 | 4.749 | 4.749 | 4.749 | 4.749 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.232 | 4.159 | 4.147 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 1.229 | 1.229 | 1.229 | 1.229 | 1.228 | 1.228 | NA | NA | NA |
| us-gaap:AdditionalPaidInCapital | ▇████▇████████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ | 7247.334 | 7305.274 | 7353.396 | 7448.484 | 7549.831 | 6989.453 | 7403.895 | 7448.099 | 7495.458 | 7527.847 | 7615.138 | 7662.673 | 7699.934 | 7735.173 | 6588.878 | 6418.038 | 6463.13 | 1232.069 | 1234.314 | 1264.041 | 1294.583 | 1327.551 | 1378.444 | 1477.631 | 1564.316 | 1537.166 | 1541.583 | 1515.158 | 1503.582 | 1377.023 | 1433.6 | 1404.086 | 1278.213 | 1267.735 | 1324.698 | 1337.045 | 1326.204 | 1317.489 | 1418.414 | 1404.087 | 1396.042 | 1384.287 | 1392.671 | NA | NA | NA |
| us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax | ▁▃▂▂▂▂▄▄▅▆▇▇▇▇▇▇▇█▇▇▇██████████▆▇▆▆▆▇▇▇▇███ | -601.443 | -465.596 | -551.449 | -530.618 | -524.903 | -499.386 | -374.0 | -421.104 | -336.396 | -269.524 | -188.239 | -158.138 | -178.589 | -174.692 | -188.53 | -181.771 | -176.085 | -139.062 | -154.35 | -154.351 | -159.246 | -134.614 | -127.242 | -136.112 | -135.334 | -139.892 | -136.353 | -107.656 | -113.127 | -109.913 | -121.987 | -219.492 | -211.97 | -223.153 | -216.798 | -240.476 | -205.64 | -178.845 | -206.121 | -174.573 | -131.266 | -135.137 | -108.802 | NA | NA | NA |
| us-gaap:TreasuryStockValue | ▁▁▂▂▂▂▃▃▃▃▄▄▄▄▄▄▄▄▄▅▅▅▅▅▅▆▆▆▆▆▇▇▇▇███▅▅▆ | 740.254 | 747.462 | 764.298 | 776.503 | 781.489 | 792.019 | 808.394 | 812.539 | 815.376 | 820.767 | 851.806 | 856.227 | 860.935 | 863.485 | 876.713 | 880.931 | 883.445 | 887.97 | 893.677 | 897.852 | 900.366 | 908.507 | 917.862 | 929.505 | 937.051 | 942.55 | 953.701 | 956.977 | 961.911 | 965.31 | 997.035 | 1005.829 | 1007.834 | 1010.45 | 1039.773 | 1048.329 | 1050.942 | 903.585 | 935.323 | 947.839 | NA | 652.573 | 663.274 | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▆▆█▄▄▅▆▄▆▄▇▅▅▅▄▃▄▃▅▄▃▃▄▄▃▁▅▄▁▅▃▃▄▅▃▂▃▅▄▂▃▇▁▂▁▆ | 544.666 | 533.317 | 795.94 | 366.71 | 313.697 | 422.721 | 619.934 | 358.894 | 614.345 | 353.606 | 670.269 | 513.48 | 507.649 | 495.321 | 379.416 | 293.105 | 373.801 | 269.09 | 429.586 | 390.422 | 302.128 | 229.478 | 311.903 | 361.157 | 294.65 | 39.27 | 415.071 | 334.232 | 45.924 | 490.383 | 273.221 | 233.265 | 316.783 | 471.498 | 228.084 | 110.249 | 226.525 | 426.085 | 330.353 | 154.02 | 227.818 | 647.781 | 74.011 | 168.904 | 32.41 | 558.717 |
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▆▆▆▅▄▃▂▃▄▃▄▃▅▆▆▆▇▆▆▆▆▆▆▆▆▅▁▅▅▅▄▃▅▅▄▅▅▆▅▅▆▆▆█▆▇ | -153.874 | -170.691 | -288.658 | -426.985 | -590.094 | -964.792 | -1120.884 | -1015.813 | -767.232 | -864.829 | -630.068 | -883.419 | -345.749 | -255.652 | -173.036 | -210.866 | -74.268 | -109.463 | -130.857 | -186.109 | -128.532 | -169.947 | -248.538 | -286.409 | -321.997 | -333.775 | -1374.087 | -371.64 | -381.162 | -439.334 | -761.34 | -837.091 | -548.793 | -494.807 | -615.615 | -460.133 | -424.052 | -314.399 | -474.739 | -387.998 | -319.404 | -189.485 | -213.804 | 249.333 | -103.509 | -66.376 |
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▁▁▁▁▅▇▂▇▄▅▂▅▂▂▂▁▂▂▂▂▂▃▃▂▃▄▇▂▅▃▂█▃▁▃▇▁▅▃▂▂▄▃▁▃▁ | -418.828 | -484.709 | -429.915 | -438.328 | 690.499 | 1052.743 | -151.401 | 1056.831 | 398.47 | 527.062 | -112.69 | 439.108 | -164.079 | -259.388 | -180.863 | -402.934 | -277.97 | -97.694 | -287.371 | -147.801 | -129.678 | -19.942 | -4.126 | -262.136 | 13.9 | 360.951 | 980.227 | -169.647 | 484.054 | 9.865 | -142.092 | 1349.669 | 121.744 | -416.362 | -7.676 | 1213.789 | -468.745 | 594.694 | 70.791 | -95.188 | -300.927 | 380.756 | 120.344 | -471.005 | 6.917 | -354.307 |
| us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease | NA | -122.083 | 77.367 | -498.603 | 414.102 | 510.672 | -652.351 | 399.912 | 245.583 | 15.839 | -72.489 | 69.169 | -2.179 | -19.719 | 25.517 | -320.695 | 21.563 | 61.933 | 11.358 | 56.512 | 43.918 | 39.589 | 59.239 | -187.388 | -13.447 | 66.446 | 21.211 | -207.055 | 148.816 | 60.914 | -630.211 | 745.843 | -110.266 | -439.671 | -395.207 | 863.905 | -666.272 | 706.38 | -73.595 | -329.166 | -392.513 | 839.052 | -19.449 | -52.768 | -64.182 | 138.034 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:DeferredIncomeTaxExpenseBenefit | ▅▅▄▅▃▁▅▄▄▄▄▅▄▄█▄ | 107.769 | 119.194 | 93.556 | 106.715 | 42.408 | -55.949 | 103.241 | 96.202 | 97.292 | 75.994 | 96.501 | 102.907 | 86.712 | 74.89 | 258.733 | 95.899 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 55.671 | 92.457 | 56.46 | 52.044 | 47.306 | 52.203 | 23.252 | 19.542 |
| us-gaap:DepreciationDepletionAndAmortization | ████▇▆▆▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▁▁▄▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂ | 156.921 | 157.12 | 152.648 | 153.245 | 140.416 | 132.353 | 125.983 | 121.43 | 114.964 | 114.158 | 110.649 | 107.383 | 106.288 | 104.237 | 103.769 | 102.298 | 100.849 | 99.419 | 99.31 | 98.55 | 99.247 | 94.478 | 93.379 | 88.299 | 86.987 | 85.955 | 80.555 | 74.588 | 72.127 | 67.414 | 108.034 | 94.267 | 91.855 | 90.221 | 86.415 | 81.434 | 84.586 | 83.409 | 77.959 | 75.986 | 78.824 | 79.391 | 76.717 | 77.234 | 75.51 | 77.856 |
| us-gaap:IncreaseDecreaseInAccountsPayable | ▆█▆▆▆▁▆▆▃▄▂█▆▁▇█▅▄▇▆▇▄▅▄▅▄▂▄▅▅▆▇▆▄▇█▃▃▆ | 112.35 | 251.344 | 118.552 | 42.032 | 109.86 | -350.701 | 99.86 | 105.251 | -205.588 | -62.469 | -278.295 | 240.735 | 78.436 | -361.008 | 179.131 | 216.508 | -11.491 | -122.843 | 149.434 | 34.222 | 168.064 | -64.088 | -13.601 | -55.423 | -10.221 | -125.898 | -306.807 | -107.76 | -31.243 | 27.817 | 82.333 | 146.697 | 39.736 | -103.69 | 125.502 | 247.523 | -227.332 | -176.674 | 103.022 | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:IncreaseDecreaseInInventories | ▅▆▃▅▅▂▄▅▃▄▃▆▅▂▅▆▄▅▃▄▅▅▄▄▃▅▂▄▄▅▇▁▃▇▃▅█▁▃▃▂█▄▂▂▆ | 85.156 | 141.794 | -72.767 | 98.694 | 70.842 | -173.885 | 21.381 | 98.595 | -58.273 | -53.444 | -129.626 | 140.517 | 100.478 | -149.825 | 28.027 | 114.133 | 6.794 | 53.305 | -77.735 | -28.177 | 89.871 | 27.991 | -14.224 | -7.829 | -68.554 | 84.557 | -204.211 | 3.229 | -23.722 | 63.844 | 247.136 | -229.217 | -132.523 | 214.541 | -127.705 | 82.917 | 262.672 | -251.227 | -92.82 | -107.785 | -166.502 | 301.262 | -5.849 | -160.491 | -175.687 | 177.305 |
| us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet | ▄▃▅█▅▂▄▄▄▇▄▄▄▆▄▅▄▆▄▄▄▅▅▅▄▆▄▅▄▅▃▅▆▄▄▅▇▅▅▅▂▆▆▄▁█ | -3.139 | -56.966 | 41.237 | 179.418 | 27.483 | -129.93 | -45.73 | -3.26 | -51.166 | 114.33 | -27.069 | -4.341 | -25.267 | 52.072 | -5.858 | 2.404 | -34.585 | 53.571 | -17.328 | -24.999 | -21.163 | 27.219 | 25.427 | 7.21 | -28.597 | 52.067 | -20.349 | 34.903 | -30.04 | -1.011 | -104.378 | 9.099 | 79.022 | -22.425 | -22.07 | 24.021 | 142.954 | 4.408 | 41.061 | 15.536 | -113.039 | 67.818 | 65.526 | -8.933 | -184.013 | 158.974 |
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▆▆█▄▄▅▆▄▆▄▇▅▅▅▄▃▄▃▅▄▃▃▄▄▃▁▅▄▁▅▃▃▄▅▃▂▃▅▄▂▃▇▁▂▁▆ | 544.666 | 533.317 | 795.94 | 366.71 | 313.697 | 422.721 | 619.934 | 358.894 | 614.345 | 353.606 | 670.269 | 513.48 | 507.649 | 495.321 | 379.416 | 293.105 | 373.801 | 269.09 | 429.586 | 390.422 | 302.128 | 229.478 | 311.903 | 361.157 | 294.65 | 39.27 | 415.071 | 334.232 | 45.924 | 490.383 | 273.221 | 233.265 | 316.783 | 471.498 | 228.084 | 110.249 | 226.525 | 426.085 | 330.353 | 154.02 | 227.818 | 647.781 | 74.011 | 168.904 | 32.41 | 558.717 |
| us-gaap:ProfitLoss | ▇█▇▇▅▁▇▇▇▇▇▇▇▆▄▅▅▅▅▅▅▅▃▅▅▄▆▄▅▆▅▅▄▅▅▅▅▆▆▅▅▆▅▄▄▅ | 342.139 | 386.176 | 308.029 | 312.316 | 134.321 | -141.857 | 320.251 | 309.155 | 311.963 | 337.208 | 292.888 | 313.916 | 282.179 | 266.049 | 64.812 | 166.531 | 175.991 | 186.185 | 194.465 | 194.216 | 179.859 | 174.959 | -28.216 | 160.838 | 150.88 | 95.693 | 201.565 | 114.281 | 140.751 | 206.511 | 184.063 | 147.698 | 79.495 | 165.705 | 195.875 | 164.988 | 149.205 | 233.462 | 264.751 | 160.88 | 134.766 | 199.346 | 147.935 | 120.301 | 86.374 | 186.72 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▆▆▆▅▄▃▂▃▄▃▄▃▅▆▆▆▇▆▆▆▆▆▆▆▆▅▁▅▅▅▄▃▅▅▄▅▅▆▅▅▆▆▆█▆▇ | -153.874 | -170.691 | -288.658 | -426.985 | -590.094 | -964.792 | -1120.884 | -1015.813 | -767.232 | -864.829 | -630.068 | -883.419 | -345.749 | -255.652 | -173.036 | -210.866 | -74.268 | -109.463 | -130.857 | -186.109 | -128.532 | -169.947 | -248.538 | -286.409 | -321.997 | -333.775 | -1374.087 | -371.64 | -381.162 | -439.334 | -761.34 | -837.091 | -548.793 | -494.807 | -615.615 | -460.133 | -424.052 | -314.399 | -474.739 | -387.998 | -319.404 | -189.485 | -213.804 | 249.333 | -103.509 | -66.376 |
| us-gaap:PaymentsToAcquirePropertyPlantAndEquipment | ▂▂▂▃▅▇█▇▆▇▆▅▃▂▂▁▁▁▁▂▁▂▂▃▂▃▄▃▃▃▅▄▄▄▅▄▃▃▄▃▃▂▂▂▁▁ | 147.388 | 176.734 | 271.378 | 380.042 | 594.282 | 949.679 | 1109.011 | 1019.174 | 830.459 | 889.705 | 831.82 | 694.303 | 350.885 | 264.467 | 181.962 | 135.199 | 82.495 | 112.737 | 133.106 | 158.274 | 136.843 | 196.411 | 257.996 | 300.868 | 285.601 | 343.847 | 574.764 | 382.185 | 392.676 | 429.525 | 658.765 | 537.487 | 559.268 | 501.065 | 627.245 | 458.211 | 432.26 | 348.437 | 473.757 | 338.538 | 329.093 | 194.679 | 226.459 | 176.585 | 111.431 | 68.273 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▁▁▁▁▅▇▂▇▄▅▂▅▂▂▂▁▂▂▂▂▂▃▃▂▃▄▇▂▅▃▂█▃▁▃▇▁▅▃▂▂▄▃▁▃▁ | -418.828 | -484.709 | -429.915 | -438.328 | 690.499 | 1052.743 | -151.401 | 1056.831 | 398.47 | 527.062 | -112.69 | 439.108 | -164.079 | -259.388 | -180.863 | -402.934 | -277.97 | -97.694 | -287.371 | -147.801 | -129.678 | -19.942 | -4.126 | -262.136 | 13.9 | 360.951 | 980.227 | -169.647 | 484.054 | 9.865 | -142.092 | 1349.669 | 121.744 | -416.362 | -7.676 | 1213.789 | -468.745 | 594.694 | 70.791 | -95.188 | -300.927 | 380.756 | 120.344 | -471.005 | 6.917 | -354.307 |
| us-gaap:ProceedsFromIssuanceOfLongTermDebt | NA | NA | 0.0 | 0.0 | 1496.556 | 1748.221 | 0.0 | 1992.653 | 750.0 | 1442.782 | 550.0 | 1245.773 | 0.0 | 0.0 | 0.429 | 1190.067 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1000.0 | 0.0 | 492.61 | 0.0 | 798.896 | 0.0 | -1199.994 | 0.0 | 1199.994 | 0.0 | 1247.822 | 0.0 | 0.0 | 0.0 | 1295.036 | 0.0 | 699.657 | 0.0 | 0.0 | 0.0 | 1295.45 | 0.0 | 0.0 | 0.0 | 0.0 | |
| us-gaap:RepaymentsOfLongTermDebt | ▁▁▁▁█▁▁▄▁▄▁▃▁▄▁▆▁▁▃▁▁▄▁▁▁▁▁▁▁▄▁▁▁▁▁▁▃▁▁▁▃▂▁▁▂▁ | 12.295 | 56.492 | 23.742 | 27.361 | 1353.73 | 52.389 | 1.912 | 551.611 | 1.912 | 501.913 | 1.912 | 426.913 | 1.912 | 501.913 | 1.912 | 988.966 | 1.947 | 1.951 | 451.923 | 1.966 | 2.003 | 652.148 | 1.958 | 1.92 | 1.927 | 1.948 | 1.911 | 1.913 | 1.922 | 551.933 | 2.066 | 1.914 | 1.913 | 1.975 | 2.213 | 3.078 | 353.091 | 3.082 | 3.157 | 93.089 | 403.179 | 228.137 | 3.067 | 3.105 | 253.21 | 3.333 |
| us-gaap:PaymentsOfDividends | ████▇▇▇▇▇▇▇▇▆▆▆▅▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁ | 416.854 | 416.229 | 415.791 | 415.614 | 387.294 | 386.667 | 378.249 | 367.845 | 357.331 | 354.203 | 351.99 | 339.575 | 327.085 | 316.408 | 285.969 | 283.687 | 129.916 | 129.842 | 129.498 | 129.595 | 129.273 | 129.235 | 128.699 | 128.082 | 126.363 | 126.053 | 122.766 | 121.367 | 116.409 | 83.275 | 78.393 | 78.367 | 74.201 | 73.781 | 67.526 | 67.671 | 63.397 | 63.375 | 57.683 | 57.981 | 55.705 | 55.651 | 51.116 | 48.954 | 46.771 | 46.701 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
|---|
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 4749000.0 | 4749000.0 | 4749000.0 | 4749000.0 | 4749000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4232000.0 | 4159000.0 | 4147000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 1229000.0 | 1229000.0 | 1229000.0 | 1229000.0 | 1228000.0 | 1228000.0 | 1224000.0 |
| Percentage of CommonStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 |
| Value | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0 |
| Percentage of PreferredStockParOrStatedValuePerShare | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 474 | 474 | 474 | 474 | 474 | 445 | 445016 | 445 | 445 | 445 | 445 | 445 | 445 | 445 | 423 | 415 | 414 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 122 | 122 | 122 | 122 | 122 | 122 | 122 | 121 | 121 |
| Percentage of SharesIssued | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2015-12-31 | 2014-12-31 |
| Value | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 20 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of SharesIssued | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 474 | 474 | 474 | 474 | 474 | 445 | 445 | 445 | 445 | 445 | 445 | 445 | 445 | 445 | 423 | 415 | 414 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 245 | 122 | 122 | 122 | 122 | 122 | 122 |
| Percentage of CommonStockSharesIssued | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 |
| Value | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 20000.0 | 0 |
| Percentage of PreferredStockSharesIssued | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 1200 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 600 | 300 | 300 | 300 | 300 | 300 | 300 | 300 |
| Percentage of CommonStockSharesAuthorized | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 445 | 445 | 444 | 444 | 444 | 413 | 413 | 413 | 412 | 412 | 411 | 411 | 411 | 411 | 388 | 381 | 380 | 210 | 210 | 210 | 210 | 210 | 209 | 209 | 208 | 208 | 208 | 208 | 207 | 207 | 206 | 206 | 206 | 206 | 204 | 204 | 205 | 103 | 103 | 102 | 103 | 107 | 106 | 105 |
| Percentage of CommonStockSharesOutstanding | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 446 | 446 | 445 | 420 | 415 | 415 | 415 | 415 | 414 | 414 | 412 | 383 | 214 | 213 | 212 | 212 | 211 | 210 | 210 | 210 | 210 | 210 | 210 | 209 | 208 | 209 | 209 | 0.211784 | 0.105926 | 0.10597 | 0.10803 | 0.109179 | 0.107651 | 0.107838 | 0.10741 |
| Percentage of WeightedAverageNumberOfDilutedSharesOutstanding | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 446 | 445 | 445 | 419 | 414 | 413 | 413 | 412 | 412 | 411 | 409 | 380 | 211 | 211 | 211 | 211 | 210 | 210 | 210 | 209 | 209 | 209 | 209 | 206 | 206 | 205 | 205 | 0.207292 | 0.103809 | 0.103303 | 0.105337 | 0.10702 | 0.106443 | 0.106356 | 0.106132 |
| Percentage of WeightedAverageNumberOfSharesOutstandingBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 0.77 | 0.87 | 0.69 | 0.7 | 0.32 | -0.34 | 0.77 | 0.75 | 0.75 | 0.82 | 0.71 | 0.76 | 0.68 | 0.65 | 0.16 | 0.43 | 0.34 | 0.41 | 0.43 | 0.44 | 0.41 | 0.4 | 0.13 | 0.39 | 0.36 | 0.29 | 0.45 | 0.31 | 0.29 | 0.45 | 0.44 | 0.3 | 0 | 0.55 | 0.54 | 0.32 | 0.29 | 1.18 | 1.11 | 0.58 | 0.52 | 1.22 | 0.78 | 0.52 | 0.39 | 1.46 |
| Percentage of EarningsPerShareBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 0.77 | 0.86 | 0.69 | 0.7 | 0.32 | -0.34 | 0.77 | 0.74 | 0.75 | 0.81 | 0.7 | 0.75 | 0.68 | 0.64 | 0.16 | 0.43 | 0.33 | 0.41 | 0.43 | 0.43 | 0.4 | 0.4 | 0.12 | 0.39 | 0.36 | 0.29 | 0.45 | 0.31 | 0.29 | 0.45 | 0.43 | 0.3 | 0 | 0.54 | 0.53 | 0.31 | 0.29 | 1.16 | 1.08 | 0.57 | 0.51 | 1.19 | 0.76 | 0.51 | 0.39 | 1.44 |
| Percentage of EarningsPerShareDiluted | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 206 | 472 | 287 | 306 | 108 | -267.243 | 367 | 224 | 245 | 255 | 262 | 333 | 277 | 316 | 56 | 160 | 74 | 102 | 90 | 97 | 61 | 76 | 34 | 81 | 81 | 57 | 65 | 69 | 58 | 102 | 188 | 54 | 12 | 106 | 135 | 30 | 34 | 150 | 83 | 17 | 59 | 103 | 64 | 68 | 43 | 167 |
| Percentage of ComprehensiveIncomeNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 6.1 | 14.8 | 11.2 | 14.1 | 6.6 | -12.5 | 13.8 | 9.9 | 10.0 | 9.2 | 8.4 | 9.8 | 9.4 | 10.2 | 1.5 | 5.5 | 2.7 | 3.7 | 3.4 | 4.1 | 2.9 | 4.3 | 1.8 | 4.3 | 3.8 | 3.2 | 2.3 | 2.2 | 1.9 | 3.2 | 4.5 | 1.5 | 0.4 | 3.0 | 3.7 | 1.0 | 1.4 | 4.4 | 2.0 | 0.5 | 1.7 | 2.7 | 2.0 | 2.3 | 1.6 | 4.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 2366 | 2121 | 1627 | 1265 | 940 | 1276 | 1791 | 1414 | 1625 | 1956 | 2318 | 2560 | 2175 | 2368 | 3073 | 2229 | 2091 | 2143 | 2021 | 1751 | 1527 | 1195 | 1333 | 1360 | 1603 | 1343 | 2281 | 2583 | 2571 | 2652 | 3488 | 3010 | 2895 | 2917 | 3055 | 2474 | 1980 | 2771 | 3138 | 3061 | 2992 | 3233 | 2812 | 2491 | 2349 | 3304 |
| Percentage of CostOfRevenue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 69.8 | 66.4 | 63.3 | 58.2 | 56.6 | 59.8 | 67.3 | 62.5 | 66.2 | 70.4 | 73.9 | 75.5 | 73.5 | 76.3 | 81.1 | 76.7 | 76.7 | 78.0 | 76.2 | 74.3 | 71.6 | 67.4 | 69.0 | 71.7 | 75.3 | 74.4 | 80.2 | 82.8 | 83.8 | 83.9 | 84.3 | 84.3 | 86.5 | 82.4 | 83.5 | 81.7 | 78.3 | 81.2 | 77.1 | 85.1 | 85.2 | 83.6 | 85.7 | 84.7 | 83.7 | 84.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 153 | 135 | 145 | 137 | 117 | 120 | 131 | 129 | 116 | 118 | 126 | 132 | 124 | 122 | 137 | 124 | 118 | 116 | 119 | 119 | 112 | 106 | 98 | 85 |
| Percentage of CostOfRevenue | 6.5 | 6.4 | 8.9 | 10.9 | 12.5 | 9.4 | 7.4 | 9.2 | 7.2 | 6.1 | 5.5 | 5.2 | 5.7 | 5.2 | 4.5 | 5.6 | 5.7 | 5.4 | 5.9 | 6.8 | 7.4 | 8.9 | 6.2 | 6.4 |
| Percentage of Revenues | 4.5 | 4.3 | 5.7 | 6.3 | 7.1 | 5.6 | 5.0 | 5.7 | 4.8 | 4.3 | 4.0 | 3.9 | 4.2 | 4.0 | 3.6 | 4.3 | 4.4 | 4.2 | 4.5 | 5.1 | 5.3 | 6.0 | 4.6 | 4.7 |
| Percentage of Revenues oke:NaturalGasLiquidsRegulated oke:NaturalGasLiquids | 25.4 | 23.8 | 0.0 | 25.4 | 24.5 | 27.7 | 0.0 | 34.1 | 38.5 | 36.7 | 0.0 | 42.0 | 42.1 | 40.9 | 0.0 | 42.4 | 41.1 | 39.3 | 0.0 | 40.0 | 37.9 | 37.9 | 43.5 | 40.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 3.8 | 12 | 8.0 | 9.6 | 6.7 | 6.1 | 5.6 | 5.1 | 3.7 | 5.6 | 5.6 | 5.5 | 5.8 | 9.1 | 11 | 10 | 8.3 | 14 | 10 | 7.8 | 5.7 | 5.6 | 7.0 | 7.2 |
| Percentage of CostOfRevenue | 0.2 | 0.6 | 0.5 | 0.8 | 0.7 | 0.5 | 0.3 | 0.4 | 0.2 | 0.3 | 0.2 | 0.2 | 0.3 | 0.4 | 0.4 | 0.5 | 0.4 | 0.7 | 0.5 | 0.4 | 0.4 | 0.5 | 0.4 | 0.5 |
| Percentage of Revenues | 0.1 | 0.4 | 0.3 | 0.4 | 0.4 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.4 | 0.3 | 0.5 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.4 |
| Percentage of Revenues oke:NaturalGasPipelinesRegulated oke:NaturalGasPipelines | 5.5 | 7.1 | 0.0 | 13.4 | 8.4 | 8.3 | 0.0 | 7.1 | 5.1 | 8.0 | 0.0 | 8.3 | 9.0 | 13.4 | 0.0 | 16.0 | 13.2 | 20.5 | 0.0 | 12.8 | 10.1 | 10.2 | 10.9 | 13.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 550 | 555 | 302 | 207 | 132 | 202 | 330 | 210 | 309 | 450 | 563 | 542 | 442 | 492 | 672 | 566 | 488 | 488 | 428 | 336 | 299 | 266 | 322 | 330 |
| Percentage of CostOfRevenue | 23.3 | 26.2 | 18.6 | 16.4 | 14.1 | 15.8 | 18.5 | 14.9 | 19.1 | 23.0 | 24.3 | 21.2 | 20.4 | 20.8 | 21.9 | 25.4 | 23.4 | 22.8 | 21.2 | 19.2 | 19.6 | 22.3 | 20.1 | 24.6 |
| Percentage of Revenues | 16.2 | 17.4 | 11.8 | 9.5 | 8.0 | 9.5 | 12.4 | 9.3 | 12.6 | 16.2 | 18.0 | 16.0 | 15.0 | 15.9 | 17.7 | 19.5 | 17.9 | 17.8 | 16.2 | 14.3 | 14.1 | 15.0 | 15.2 | 18.3 |
| Percentage of Revenues oke:NaturalGasGatheringAndProcessing | 63.8 | 66.1 | 0.0 | 45.2 | 44.1 | 44.9 | 0.0 | 44.3 | 53.2 | 64.9 | 0.0 | 68.6 | 63.2 | 69.6 | 0.0 | 72.4 | 71.3 | 73.9 | 0.0 | 65.7 | 62.9 | 61.6 | 70.2 | 72.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 2399 | 2060 | 1634 | 1289 | 905 | 1278 | 1776 | 1438 | 1629 | 1846 | 2167 | 2544 | 2183 | 2281 | 2987 | 2136 | 2003 | 2048 | 1945 | 1694 | 1525 | 1156 | 1535 | 1228 |
| Percentage of CostOfRevenue | 101.4 | 97.1 | 100.5 | 101.9 | 96.2 | 100.1 | 99.2 | 101.7 | 100.2 | 94.4 | 93.5 | 99.4 | 100.4 | 96.3 | 97.2 | 95.8 | 95.8 | 95.6 | 96.2 | 96.7 | 99.9 | 96.8 | 95.8 | 91.4 |
| Percentage of Revenues | 70.8 | 64.5 | 63.6 | 59.3 | 54.5 | 59.8 | 66.7 | 63.5 | 66.3 | 66.4 | 69.1 | 75.0 | 73.8 | 73.5 | 78.8 | 73.5 | 73.5 | 74.5 | 73.3 | 71.9 | 71.5 | 65.2 | 72.2 | 68.1 |
| Percentage of Revenues oke:NaturalGasLiquids | 80.0 | 78.9 | 0.0 | 70.4 | 67.8 | 72.2 | 0.0 | 75.7 | 78.6 | 79.9 | 0.0 | 84.1 | 83.5 | 84.7 | 0.0 | 85.4 | 85.3 | 85.6 | 0.0 | 83.1 | 81.5 | 77.8 | 83.1 | 82.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 0.544 | 10 | 1.713 | 3.389 | 0.168 | 1.539 | 0.843 | 0.381 | 1.649 | 1.755 | 5.509 | 2.384 | 2.637 | 5.454 | 9.434 | 10 | 6.773 | 16 | 14 | 6.87 | 5.112 | 3.932 | 6.005 | 14 |
| Percentage of CostOfRevenue | 0.0 | 0.5 | 0.1 | 0.3 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.2 | 0.3 | 0.5 | 0.3 | 0.8 | 0.7 | 0.4 | 0.3 | 0.3 | 0.4 | 1.1 |
| Percentage of Revenues | 0.0 | 0.3 | 0.1 | 0.2 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.2 | 0.2 | 0.4 | 0.2 | 0.6 | 0.6 | 0.3 | 0.2 | 0.2 | 0.3 | 0.8 |
| Percentage of Revenues oke:NaturalGasPipelines | 0.5 | 4.0 | 0.0 | 2.9 | 0.1 | 1.3 | 0.0 | 0.3 | 1.4 | 1.5 | 0.0 | 2.3 | 2.6 | 5.0 | 0.0 | 10.0 | 6.9 | 15.5 | 0.0 | 7.5 | 5.8 | 4.6 | 7.5 | 17.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 2950 | 2625 | 1938 | 1500 | 1037 | 1482 | 2108 | 1649 | 1940 | 2299 | 2736 | 3089 | 2629 | 2779 | 3669 | 2713 | 2499 | 2553 | 2388 | 2037 | 1830 | 1427 |
| Percentage of CostOfRevenue | 124.7 | 123.8 | 119.2 | 118.6 | 110.3 | 116.1 | 117.7 | 116.6 | 119.4 | 117.5 | 118.0 | 120.7 | 120.8 | 117.4 | 119.4 | 121.7 | 119.5 | 119.1 | 118.2 | 116.3 | 119.8 | 119.4 |
| Percentage of Revenues | 87.1 | 82.2 | 75.4 | 69.0 | 62.5 | 69.4 | 79.1 | 72.9 | 79.0 | 82.7 | 87.2 | 91.0 | 88.8 | 89.6 | 96.8 | 93.4 | 91.7 | 92.9 | 90.0 | 86.4 | 85.8 | 80.4 |
| Percentage of Revenues oke:TotalSegments | 74.2 | 71.0 | 0.0 | 62.3 | 59.0 | 63.3 | 0.0 | 66.0 | 70.0 | 73.6 | 0.0 | 78.8 | 77.0 | 79.2 | 0.0 | 80.0 | 79.8 | 80.8 | 0.0 | 77.1 | 75.1 | 71.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 |
| Value | -583.97 | -504.128 | -311.676 | -234.901 | -97.085 | -205.535 | -316.881 | -234.798 | -315.173 | -342.964 | -418.189 | -528.936 | -453.29 | -411.122 | -595.755 | -484.393 | -408.243 | -409.837 | -367.004 | -285.894 | -303.014 | -231.444 | -265.431 | -230.182 | -261.331 | -230.358 |
| Percentage of CostOfRevenue | -24.7 | -23.8 | -19.2 | -18.6 | -10.3 | -16.1 | -17.7 | -16.6 | -19.4 | -17.5 | -18.0 | -20.7 | -20.8 | -17.4 | -19.4 | -21.7 | -19.5 | -19.1 | -18.2 | -16.3 | -19.8 | -19.4 | -19.9 | -16.9 | -16.3 | -17.1 |
| Percentage of Revenues | -17.2 | -15.8 | -12.1 | -10.8 | -5.8 | -9.6 | -11.9 | -10.4 | -12.8 | -12.3 | -13.3 | -15.6 | -15.3 | -13.3 | -15.7 | -16.7 | -15.0 | -14.9 | -13.8 | -12.1 | -14.2 | -13.0 | -13.7 | -12.1 | -12.3 | -12.8 |
| Percentage of Revenues us-gaap:IntersegmentElimination | 99.6 | 100.0 | 0.0 | 100.1 | 100.2 | 100.4 | 0.0 | 99.9 | 100.2 | 100.1 | 0.0 | 100.0 | 99.8 | 100.7 | 0.0 | 99.9 | 100.2 | 99.8 | 0.0 | 100.1 | 100.1 | 100.2 | 0.0 | 100.1 | 100.1 | 100.2 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.1 | 2.2 | 4.3 | 15 |
| Percentage of GainsLossesOnExtinguishmentOfDebt | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.1 | 0.3 | 0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 452 | 508 | 403 | 418 | 177 | -197.252 | 418 | 406 | 410 | 415 | 389 | 416 | 369 | 341 | 316 | 263 | 219 | 241 | 249 | 249 | 232 | 225 | -13.627 | 202 | 199 | 133 | 256 | 152 | 191 | 219 | 239 | 187 | 80 | 233 | 254 | 207 | 189 | 293 | 333 | 194 | 170 | 282 | 202 | 150 | 117 |
| Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 13.3 | 15.9 | 15.7 | 19.3 | 10.7 | -9.2 | 15.7 | 18.0 | 16.7 | 14.9 | 12.4 | 12.3 | 12.5 | 11.0 | 8.3 | 9.1 | 8.1 | 8.8 | 9.4 | 10.6 | 10.9 | 12.7 | -0.7 | 10.7 | 9.4 | 7.4 | 9.0 | 4.9 | 6.2 | 6.9 | 5.8 | 5.2 | 2.4 | 6.6 | 6.9 | 6.9 | 7.5 | 8.6 | 8.2 | 5.4 | 4.9 | 7.3 | 6.2 | 5.1 | 4.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 110 | 122 | 95 | 106 | 43 | -55.395 | 98 | 97 | 98 | 77 | 96 | 102 | 87 | 75 | 251 | 97 | 43 | 54 | 54 | 55 | 52 | 50 | 12 | 38 | 48 | 37 | 56 | 37 | 42 | 14 | 55 | 39 | 1.362 | 67 | 58 | 42 | 40 | 73 | 71 | 33 | 36 | 84 | 55 | 29 | 31 | 97 |
| Percentage of IncomeTaxExpenseBenefit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 3.2 | 3.8 | 3.7 | 4.9 | 2.6 | -2.6 | 3.7 | 4.3 | 4.0 | 2.8 | 3.1 | 3.0 | 3.0 | 2.4 | 6.6 | 3.3 | 1.6 | 2.0 | 2.1 | 2.3 | 2.5 | 2.8 | 0.7 | 2.0 | 2.3 | 2.1 | 2.0 | 1.2 | 1.4 | 0.5 | 1.3 | 1.1 | 0.0 | 1.9 | 1.6 | 1.4 | 1.6 | 2.2 | 1.7 | 0.9 | 1.0 | 2.2 | 1.7 | 1.0 | 1.1 | 2.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 184 | 185 | 176 | 176 | 218 | 140 | 129 | 129 | 117 | 115 | 118 | 121 | 113 | 115 | 124 | 126 | 118 | 116 | 114 | 118 | 118 | 118 | 110 | 106 | 102 | 96 | 86 | 86 | 88 | 94 | 90 | 81 | 81 | 80 | 83 | 71 | 71 | 75 | 68 | 73 | 75 | 79 | 69 | 70 | 75 | 76 |
| Percentage of InterestExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 5.5 | 5.8 | 6.9 | 8.1 | 13.2 | 6.6 | 4.9 | 5.7 | 4.8 | 4.2 | 3.8 | 3.6 | 3.8 | 3.7 | 3.3 | 4.4 | 4.3 | 4.2 | 4.3 | 5.0 | 5.6 | 6.7 | 5.7 | 5.6 | 4.8 | 5.4 | 3.0 | 2.8 | 2.9 | 3.0 | 2.2 | 2.3 | 2.4 | 2.3 | 2.3 | 2.4 | 2.8 | 2.2 | 1.7 | 2.1 | 2.1 | 2.1 | 2.1 | 2.4 | 2.7 | 2.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 |
| Value | 341 | 385 | 307 | 312 | 134 | -142.132 | 319 | 308 | 311 | 336 | 292 | 312 | 280 | 264 | 62 | 165 | 71 | 87 | 90 | 92 | 85 |
| Percentage of NetIncomeLossAvailableToCommonStockholdersBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 10.1 | 12.1 | 12.0 | 14.4 | 8.1 | -6.7 | 12.0 | 13.6 | 12.7 | 12.1 | 9.3 | 9.2 | 9.5 | 8.5 | 1.7 | 5.7 | 2.6 | 3.2 | 3.4 | 3.9 | 4.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 611 | 664 | 538 | 550 | 355 | -83.469 | 487 | 482 | 476 | 468 | 471 | 495 | 448 | 419 | 397 | 351 | 316 | 314 | 329 | 329 | 315 | 311 | 242 | 284 | 272 | 196 | 306 | 291 | 251 | 294 | 294 | 230 | 128 | 273 | 299 | 242 | 234 | 325 | 363 | 248 | 216 | 330 | 241 | 186 | 178 | 337 |
| Percentage of OperatingIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 18.0 | 20.8 | 21.0 | 25.3 | 21.4 | -3.9 | 18.3 | 21.3 | 19.4 | 16.9 | 15.0 | 14.6 | 15.1 | 13.5 | 10.5 | 12.1 | 11.6 | 11.4 | 12.4 | 14.0 | 14.8 | 17.6 | 12.5 | 15.0 | 12.8 | 10.9 | 10.8 | 9.3 | 8.2 | 9.3 | 7.1 | 6.4 | 3.8 | 7.7 | 8.2 | 8.0 | 9.3 | 9.5 | 8.9 | 6.9 | 6.2 | 8.5 | 7.3 | 6.4 | 6.4 | 8.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | -135.847 | 85 | -20.831 | -5.715 | -25.517 | -125.386 | 47 | -84.708 | -66.872 | -81.285 | -30.101 | 20 | -3.897 | 51 | -6.759 | -5.686 | 5.474 | 44 | 47 | 11 | -85.139 | -28.783 | 9.43 | 2.022 | 6.655 | -18.625 | -23.764 | 11 | -19.413 | -8.624 | 96 | -9.486 | 43 | -13.881 | 19 | -57.044 | -41.071 | 40 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -4.0 | 2.7 | -0.8 | -0.3 | -1.5 | -5.9 | 1.8 | -3.7 | -2.7 | -2.9 | -1.0 | 0.6 | -0.1 | 1.7 | -0.2 | -0.2 | 0.2 | 1.6 | 1.8 | 0.5 | -4.0 | -1.6 | 0.5 | 0.1 | 0.3 | -1.0 | -0.8 | 0.4 | -0.6 | -0.3 | 2.3 | -0.3 | 1.3 | -0.4 | 0.5 | -1.9 | -1.6 | 1.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | -135.847 | 85 | -5.715 | -25.517 | -125.386 | 47 | -84.708 | -66.872 | -81.285 | -30.101 | 20 | -3.897 | 51 | -6.759 | -5.686 | 3.265 | 15 | 0.001 | 4.895 | -24.632 | -7.372 | 8.87 | -0.778 | 4.558 | -3.539 | -28.697 | 5.471 | -3.214 | 8.685 | 97 | -7.522 | 11 | -6.355 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 59.6 | 34.7 | 0.0 | 43.4 | 28.9 | 25.6 | 94.1 | -38.5 | 68.5 | 19.0 | 120.8 | 47.0 | 16.6 | -100.7 | 101.0 | 79.3 | 25.8 | 45.8 |
| Percentage of Revenues | -4.0 | 2.7 | -0.3 | -1.5 | -5.9 | 1.8 | -3.7 | -2.7 | -2.9 | -1.0 | 0.6 | -0.1 | 1.7 | -0.2 | -0.2 | 0.1 | 0.6 | 0.0 | 0.2 | -1.2 | -0.4 | 0.5 | -0.0 | 0.2 | -0.2 | -1.0 | 0.2 | -0.1 | 0.3 | 2.4 | -0.2 | 0.3 | -0.2 |
| Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 |
| Value | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 274000.0 | 276000.0 | 217000.0 | 0 | 0 | 0 | 0 |
| Percentage of PreferredStockDividendsIncomeStatementImpact | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 342 | 386 | 308 | 312 | 134 | -141.857 | 320 | 309 | 311 | 337 | 292 | 313 | 282 | 266 | 64 | 166 | 175 | 186 | 194 | 194 | 179 | 174 | -28.216 | 160 | 150 | 95 | 201 | 114 | 140 | 206 | 184 | 147 | 79 | 165 | 195 | 164 | 149 | 233 | 264 | 160 | 134 | 199 | 147 | 120 | 86 | 186 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 10.1 | 12.1 | 12.0 | 14.4 | 8.1 | -6.6 | 12.0 | 13.7 | 12.7 | 12.1 | 9.3 | 9.2 | 9.5 | 8.6 | 1.7 | 5.7 | 6.5 | 6.8 | 7.3 | 8.2 | 8.4 | 9.9 | -1.5 | 8.5 | 7.1 | 5.3 | 7.1 | 3.7 | 4.6 | 6.5 | 4.4 | 4.1 | 2.4 | 4.7 | 5.4 | 5.4 | 5.9 | 6.8 | 6.5 | 4.5 | 3.8 | 5.2 | 4.5 | 4.1 | 3.1 | 4.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 |
| Value | 342 | 386 | 312 | 134 | -141.857 | 309 | 311 | 337 | 292 | 313 | 281 | 264 | 63 | 165 | 71 | 87 | 90 | 92 | 85 | 83 | 25 | 82 | 76 | 60 | 94 | 64 | 61 | 93 | 90 | 62 | 0.919 | 112 | 111 | 65 | 60 | 122 | 115 | 60 | 55 | 130 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 99.8 | 99.6 | 99.4 | 97.3 | 99.5 | 40.7 | 46.9 | 46.5 | 47.4 | 47.8 | 47.7 | -90.4 | 51.1 | 50.7 | 63.5 | 46.9 | 56.4 | 43.8 | 45.3 | 49.3 | 42.2 | 1.2 | 67.9 | 56.9 | 39.5 | 40.9 | 52.6 | 43.4 | 37.5 | 40.9 | 65.3 |
| Percentage of Revenues | 10.1 | 12.1 | 14.4 | 8.1 | -6.6 | 13.7 | 12.7 | 12.1 | 9.3 | 9.2 | 9.5 | 8.5 | 1.7 | 5.7 | 2.6 | 3.2 | 3.4 | 3.9 | 4.0 | 4.7 | 1.3 | 4.3 | 3.6 | 3.4 | 3.3 | 2.1 | 2.0 | 3.0 | 2.2 | 1.7 | 0.0 | 3.2 | 3.0 | 2.2 | 2.4 | 3.6 | 2.8 | 1.7 | 1.6 | 3.4 |
| Percentage of Revenues us-gaap:RetainedEarnings | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 34 | 31 | 31 | 36 | 35 | 37 | 38 | 42 | 43 | 39 | 40 | 41 | 42 | 38 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 1.0 | 1.0 | 1.2 | 1.7 | 2.2 | 1.8 | 1.4 | 1.9 | 1.8 | 1.4 | 1.3 | 1.2 | 1.4 | 1.2 |
| Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:NaturalGasGatheringAndProcessing | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 129 | 113 | 117 | 132 | 118 | 120 | 104 | 105 | 105 | 98 | 108 | 116 | 96 | 83 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 379.7 | 357.3 | 372.3 | 362.6 | 328.7 | 317.7 | 273.8 | 245.8 | 243.2 | 247.9 | 265.1 | 284.3 | 225.4 | 216.7 |
| Percentage of Revenues | 3.8 | 3.5 | 4.6 | 6.1 | 7.1 | 5.6 | 3.9 | 4.6 | 4.3 | 3.5 | 3.5 | 3.4 | 3.3 | 2.7 |
| Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:NaturalGasLiquids | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 163 | 144 | 149 | 168 | 154 | 158 | 142 | 147 | 149 | 138 | 149 | 157 | 139 | 121 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 479.7 | 457.3 | 472.3 | 462.6 | 428.7 | 417.7 | 373.8 | 345.8 | 343.2 | 347.9 | 365.1 | 384.3 | 325.4 | 316.7 |
| Percentage of Revenues | 4.8 | 4.5 | 5.8 | 7.8 | 9.3 | 7.4 | 5.4 | 6.5 | 6.1 | 5.0 | 4.8 | 4.7 | 4.7 | 3.9 |
| Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:TotalSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 566 | 491 | 320 | 239 | 109 | 219 | 334 | 244 | 312 | 332 | 413 | 501 | 447 | 413 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1659.0 | 1552.1 | 1013.0 | 657.8 | 304.8 | 579.7 | 874.7 | 572.3 | 718.4 | 836.2 | 1012.7 | 1219.3 | 1046.3 | 1075.1 |
| Percentage of Revenues | 16.7 | 15.4 | 12.5 | 11.0 | 6.6 | 10.3 | 12.6 | 10.8 | 12.7 | 12.0 | 13.2 | 14.8 | 15.1 | 13.3 |
| Percentage of Revenues oke:NGLandCondensateSales oke:NaturalGasGatheringAndProcessing | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 2829 | 2414 | 1979 | 1658 | 1174 | 1596 | 2084 | 1746 | 1921 | 2158 | 2435 | 2861 | 2469 | 2552 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 8288.5 | 7620.9 | 6266.0 | 4547.9 | 3267.4 | 4208.8 | 5453.2 | 4081.4 | 4413.7 | 5430.3 | 5960.6 | 6963.1 | 5769.8 | 6642.8 |
| Percentage of Revenues | 83.5 | 75.6 | 77.0 | 76.3 | 70.7 | 74.7 | 78.3 | 77.2 | 78.2 | 77.6 | 77.7 | 84.3 | 83.4 | 82.3 |
| Percentage of Revenues oke:NGLandCondensateSales oke:NaturalGasLiquids | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 3395 | 2906 | 2299 | 1897 | 1284 | 1816 | 2418 | 1991 | 2234 | 2490 | 2849 | 3363 | 2917 | 2965 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 9947.5 | 9173.0 | 7278.9 | 5205.7 | 3572.2 | 4788.5 | 6327.9 | 4653.7 | 5132.1 | 6266.5 | 6973.3 | 8182.4 | 6816.1 | 7717.9 |
| Percentage of Revenues | 100.2 | 91.0 | 89.5 | 87.3 | 77.3 | 85.0 | 90.8 | 88.0 | 90.9 | 89.6 | 90.8 | 99.1 | 98.5 | 95.6 |
| Percentage of Revenues oke:NGLandCondensateSales oke:TotalSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 257 | 312 | 253 | 178 | 150 | 189 | 240 | 185 | 221 | 319 | 375 | 245 | 208 | 254 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 755.2 | 985.4 | 800.8 | 489.6 | 419.7 | 498.3 | 629.1 | 433.0 | 508.4 | 802.8 | 917.9 | 597.2 | 487.4 | 663.6 |
| Percentage of Revenues | 7.6 | 9.8 | 9.8 | 8.2 | 9.1 | 8.8 | 9.0 | 8.2 | 9.0 | 11.5 | 12.0 | 7.2 | 7.0 | 8.2 |
| Percentage of Revenues oke:ResidueNaturalGasSales oke:NaturalGasGatheringAndProcessing | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 0.004 | 115 | 2.66 | 3.998 | 0.0 | 2.035 | 0.002 | 0.231 | 0.041 | 0.97 | 3.911 | 0.763 | 0.179 | 4.919 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 364.4 | 8.4 | 11.0 | 0.0 | 5.4 | 0.0 | 0.5 | 0.1 | 2.4 | 9.6 | 1.9 | 0.4 | 12.8 |
| Percentage of Revenues | 0.0 | 3.6 | 0.1 | 0.2 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.2 |
| Percentage of Revenues oke:ResidueNaturalGasSales oke:NaturalGasPipelines | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 257 | 427 | 255 | 182 | 150 | 191 | 240 | 185 | 221 | 320 | 378 | 246 | 208 | 259 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 755.2 | 1349.8 | 809.3 | 500.5 | 419.7 | 503.7 | 629.1 | 433.5 | 508.5 | 805.2 | 927.5 | 599.1 | 487.8 | 676.4 |
| Percentage of Revenues | 7.6 | 13.4 | 9.9 | 8.4 | 9.1 | 8.9 | 9.0 | 8.2 | 9.0 | 11.5 | 12.1 | 7.3 | 7.1 | 8.4 |
| Percentage of Revenues oke:ResidueNaturalGasSales oke:TotalSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 37 | 48 | 51 | 39 | 40 | 50 | 56 | 46 | 42 | 52 | 55 | 45 | 45 | 53 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 110.9 | 153.8 | 163.0 | 109.1 | 113.7 | 133.8 | 146.8 | 108.4 | 98.0 | 131.7 | 135.3 | 110.1 | 105.2 | 139.2 |
| Percentage of Revenues | 1.1 | 1.5 | 2.0 | 1.8 | 2.5 | 2.4 | 2.1 | 2.1 | 1.7 | 1.9 | 1.8 | 1.3 | 1.5 | 1.7 |
| Percentage of Revenues oke:TransportationandStorageRevenue oke:NaturalGasLiquids | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 112 | 132 | 116 | 113 | 121 | 118 | 148 | 108 | 105 | 103 | 104 | 98 | 93 | 98 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 329.1 | 419.6 | 370.0 | 310.1 | 338.7 | 312.0 | 389.0 | 253.3 | 242.8 | 260.4 | 255.4 | 238.5 | 217.9 | 255.9 |
| Percentage of Revenues | 3.3 | 4.2 | 4.5 | 5.2 | 7.3 | 5.5 | 5.6 | 4.8 | 4.3 | 3.7 | 3.3 | 2.9 | 3.2 | 3.2 |
| Percentage of Revenues oke:TransportationandStorageRevenue oke:NaturalGasPipelines | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 150 | 181 | 168 | 152 | 162 | 169 | 204 | 154 | 148 | 155 | 159 | 143 | 138 | 151 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 440.0 | 573.3 | 533.0 | 419.2 | 452.5 | 445.8 | 535.8 | 361.7 | 340.8 | 392.0 | 390.7 | 348.6 | 323.1 | 395.1 |
| Percentage of Revenues | 4.4 | 5.7 | 6.6 | 7.0 | 9.8 | 7.9 | 7.7 | 6.8 | 6.0 | 5.6 | 5.1 | 4.2 | 4.7 | 4.9 |
| Percentage of Revenues oke:TransportationandStorageRevenue oke:TotalSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 3388 | 3194 | 2570 | 2174 | 1660 | 2136 | 2663 | 2263 | 2457 | 2779 | 3136 | 3393 | 2960 | 3102 | 3792 | 2906 | 2725 | 2749 | 2654 | 2357 | 2134 | 1774 | 1930 | 1898 | 2128 | 1805 | 2844 | 3120 | 3066 | 3163 | 4140 | 3571 | 3349 | 3541 | 3659 | 3028 | 2529 | 3414 | 4071 | 3595 | 3514 | 3866 | 3280 | 2942 | 2807 | 3923 |
| Percentage of Revenues | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 555 | 481 | 308 | 235 | 108 | 213 | 302 | 244 | 317 | 335 | 402 | 519 | 448 | 397 |
| Percentage of Revenues | 16.4 | 15.1 | 12.0 | 10.8 | 6.5 | 10.0 | 11.3 | 10.8 | 12.9 | 12.1 | 12.8 | 15.3 | 15.1 | 12.8 |
| Percentage of Revenues | 16.4 | 15.1 | 12.0 | 10.8 | 6.5 | 10.0 | 11.3 | 10.8 | 12.9 | 12.1 | 12.8 | 15.3 | 15.1 | 12.8 |
| Percentage of Revenues oke:NaturalGasGatheringandProcessingIntersegment oke:NaturalGasGatheringAndProcessing | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2020-06-30 |
| Value | 557 | 432 |
| Percentage of Revenues | 16.4 | 26.0 |
| Percentage of Revenues | 16.4 | 26.0 |
| Percentage of Revenues oke:NaturalGasLiquidsRegulated us-gaap:OperatingSegments oke:NaturalGasLiquids | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 516 | 493 | 495 | 432 | 378 | 347 | 315 | 267 | 270 | 315 | 276 | 255 | 253 | 264 | 250 | 249 | 252 | 250 | 253 | 258 | 230 | 186 | 165 |
| Percentage of Revenues | 16.2 | 19.2 | 22.8 | 26.0 | 17.7 | 13.0 | 13.9 | 10.9 | 9.7 | 10.0 | 8.1 | 8.6 | 8.2 | 7.0 | 8.6 | 9.1 | 9.2 | 9.4 | 10.7 | 12.1 | 13.0 | 8.8 | 9.2 |
| Percentage of Revenues | 16.2 | 19.2 | 22.8 | 26.0 | 17.7 | 13.0 | 13.9 | 10.9 | 9.7 | 10.0 | 8.1 | 8.6 | 8.2 | 7.0 | 8.6 | 9.1 | 9.2 | 9.4 | 10.7 | 12.1 | 13.0 | 8.8 | 9.2 |
| Percentage of Revenues oke:NaturalGasLiquidsRegulated us-gaap:OperatingSegments oke:NaturalGasLiquids | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 603 | 570 | 546 | 541 | 477 | 435 | 400 | 379 | 303 | 323 | 289 | 316 | 294 | 300 | 320 | 293 | 289 | 296 | 296 | 299 | 297 | 281 | 227 | 209 |
| Percentage of Revenues | 17.8 | 17.9 | 21.2 | 24.9 | 28.7 | 20.4 | 15.0 | 16.8 | 12.3 | 11.6 | 9.2 | 9.3 | 9.9 | 9.7 | 8.5 | 10.1 | 10.6 | 10.8 | 11.2 | 12.7 | 13.9 | 15.9 | 10.7 | 11.6 |
| Percentage of Revenues | 17.8 | 17.9 | 21.2 | 24.9 | 28.7 | 20.4 | 15.0 | 16.8 | 12.3 | 11.6 | 9.2 | 9.3 | 9.9 | 9.7 | 8.5 | 10.1 | 10.6 | 10.8 | 11.2 | 12.7 | 13.9 | 15.9 | 10.7 | 11.6 |
| Percentage of Revenues oke:NaturalGasLiquidsRegulated oke:NaturalGasLiquids | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 69 | 181 | 72 | 71 | 79 | 73 | 70 | 72 | 72 | 70 | 68 | 65 | 64 | 68 | 67 | 65 | 62 | 68 | 66 | 61 | 56 | 54 | 64 | 54 |
| Percentage of Revenues | 2.0 | 5.7 | 2.8 | 3.3 | 4.8 | 3.5 | 2.7 | 3.2 | 2.9 | 2.5 | 2.2 | 1.9 | 2.2 | 2.2 | 1.8 | 2.3 | 2.3 | 2.5 | 2.5 | 2.6 | 2.7 | 3.1 | 3.0 | 3.0 |
| Percentage of Revenues | 2.0 | 5.7 | 2.8 | 3.3 | 4.8 | 3.5 | 2.7 | 3.2 | 2.9 | 2.5 | 2.2 | 1.9 | 2.2 | 2.2 | 1.8 | 2.3 | 2.3 | 2.5 | 2.5 | 2.6 | 2.7 | 3.1 | 3.0 | 3.0 |
| Percentage of Revenues oke:NaturalGasPipelinesRegulated oke:NaturalGasPipelines | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -76.0 | -132.2 | -37.2 | 4.0 | 18 | 80 | 9.7 | 89 | 18 | 22 | 15 | -17.7 | -5.4 | -9.0 |
| Percentage of Revenues | -2.2 | -4.1 | -1.4 | 0.2 | 1.1 | 3.8 | 0.4 | 3.9 | 0.8 | 0.8 | 0.5 | -0.5 | -0.2 | -0.3 |
| Percentage of Revenues | -2.2 | -4.1 | -1.4 | 0.2 | 1.1 | 3.8 | 0.4 | 3.9 | 0.8 | 0.8 | 0.5 | -0.5 | -0.2 | -0.3 |
| Percentage of Revenues oke:NoncustomerDomain | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 3074 | 2836 | 2250 | 1852 | 1343 | 1808 | 2348 | 1947 | 2146 | 2472 | 2816 | 3083 | 2675 |
| Percentage of Revenues | 90.7 | 88.8 | 87.6 | 85.2 | 80.9 | 84.6 | 88.2 | 86.1 | 87.4 | 89.0 | 89.8 | 90.9 | 90.4 |
| Percentage of Revenues | 90.7 | 88.8 | 87.6 | 85.2 | 80.9 | 84.6 | 88.2 | 86.1 | 87.4 | 89.0 | 89.8 | 90.9 | 90.4 |
| Percentage of Revenues oke:CommoditySales | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 163 | 144 | 149 | 168 | 154 | 158 | 142 | 147 | 149 | 138 | 149 | 157 | 139 | 121 |
| Percentage of Revenues | 4.8 | 4.5 | 5.8 | 7.8 | 9.3 | 7.4 | 5.4 | 6.5 | 6.1 | 5.0 | 4.8 | 4.7 | 4.7 | 3.9 |
| Percentage of Revenues | 4.8 | 4.5 | 5.8 | 7.8 | 9.3 | 7.4 | 5.4 | 6.5 | 6.1 | 5.0 | 4.8 | 4.7 | 4.7 | 3.9 |
| Percentage of Revenues oke:GatheringandExchangeServicesRevenue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 2813 | 2406 | 1992 | 1673 | 1195 | 1617 | 2107 | 1761 | 1923 | 2152 | 2439 | 2836 | 2468 | 2557 |
| Percentage of Revenues | 83.0 | 75.3 | 77.5 | 77.0 | 72.0 | 75.7 | 79.1 | 77.8 | 78.3 | 77.4 | 77.8 | 83.6 | 83.4 | 82.4 |
| Percentage of Revenues | 83.0 | 75.3 | 77.5 | 77.0 | 72.0 | 75.7 | 79.1 | 77.8 | 78.3 | 77.4 | 77.8 | 83.6 | 83.4 | 82.4 |
| Percentage of Revenues oke:NGLandCondensateSales | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 6.853 | 37 | 8.449 | 6.576 | 5.42 | 5.679 | -23.084 | 16 | 17 | 16 | 14 | 12 | 10 | 11 |
| Percentage of Revenues | 0.2 | 1.2 | 0.3 | 0.3 | 0.3 | 0.3 | -0.9 | 0.7 | 0.7 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 |
| Percentage of Revenues | 0.2 | 1.2 | 0.3 | 0.3 | 0.3 | 0.3 | -0.9 | 0.7 | 0.7 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 |
| Percentage of Revenues oke:Other | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 257 | 427 | 255 | 176 | 146 | 190 | 239 | 184 | 221 | 320 | 376 | 246 | 205 | 262 |
| Percentage of Revenues | 7.6 | 13.4 | 9.9 | 8.1 | 8.8 | 8.9 | 9.0 | 8.2 | 9.0 | 11.5 | 12.0 | 7.3 | 7.0 | 8.5 |
| Percentage of Revenues | 7.6 | 13.4 | 9.9 | 8.1 | 8.8 | 8.9 | 9.0 | 8.2 | 9.0 | 11.5 | 12.0 | 7.3 | 7.0 | 8.5 |
| Percentage of Revenues oke:ResidueNaturalGasSales | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 314 | 358 | 319 | 322 | 317 | 328 | 315 | 315 | 310 | 306 | 319 | 310 | 285 |
| Percentage of Revenues | 9.3 | 11.2 | 12.4 | 14.8 | 19.1 | 15.4 | 11.8 | 13.9 | 12.6 | 11.0 | 10.2 | 9.1 | 9.6 |
| Percentage of Revenues | 9.3 | 11.2 | 12.4 | 14.8 | 19.1 | 15.4 | 11.8 | 13.9 | 12.6 | 11.0 | 10.2 | 9.1 | 9.6 |
| Percentage of Revenues oke:Services | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 146 | 178 | 164 | 149 | 159 | 165 | 196 | 152 | 145 | 153 | 156 | 140 | 135 | 149 |
| Percentage of Revenues | 4.3 | 5.6 | 6.4 | 6.9 | 9.6 | 7.7 | 7.4 | 6.7 | 5.9 | 5.5 | 5.0 | 4.2 | 4.6 | 4.8 |
| Percentage of Revenues | 4.3 | 5.6 | 6.4 | 6.9 | 9.6 | 7.7 | 7.4 | 6.7 | 5.9 | 5.5 | 5.0 | 4.2 | 4.6 | 4.8 |
| Percentage of Revenues oke:TransportationandStorageRevenue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -582.14 | -500.064 | -307.681 | -224.731 | -88.967 | -199.472 | -311.466 | -230.08 | -310.527 | -338.351 | -410.478 | -526.398 | -448.556 | -408.91 |
| Percentage of Revenues | -17.2 | -15.7 | -12.0 | -10.3 | -5.4 | -9.3 | -11.7 | -10.2 | -12.6 | -12.2 | -13.1 | -15.5 | -15.2 | -13.2 |
| Percentage of Revenues | -17.2 | -15.7 | -12.0 | -10.3 | -5.4 | -9.3 | -11.7 | -10.2 | -12.6 | -12.2 | -13.1 | -15.5 | -15.2 | -13.2 |
| Percentage of Revenues oke:NGLandCondensateSales us-gaap:IntersegmentElimination | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 5.128 | 4.0 | 6.198 | 4.644 | 3.387 | 3.075 | 2.526 | 3.182 | 4.554 | 3.551 | 4.634 | 3.517 | 1.671 | 1.408 |
| Percentage of Revenues | 0.2 | 0.1 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 |
| Percentage of Revenues | 0.2 | 0.1 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 |
| Percentage of Revenues oke:Other oke:NaturalGasGatheringAndProcessing | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 2.386 | 33 | 2.413 | 2.11 | 2.079 | 2.59 | 2.649 | 2.291 | 2.481 | 2.541 | 2.614 | 2.308 | 2.931 | 2.963 |
| Percentage of Revenues | 0.1 | 1.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Revenues | 0.1 | 1.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Revenues oke:Other oke:NaturalGasLiquids | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 0.103 | 0.412 | 0.276 | 0.251 | 0.281 | 0.384 | -32.205 | 12 | 11 | 11 | 8.559 | 6.4 | 6.336 | 6.654 |
| Percentage of Revenues | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -1.2 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | 0.2 | 0.2 |
| Percentage of Revenues | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -1.2 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | 0.2 | 0.2 |
| Percentage of Revenues oke:Other oke:NaturalGasPipelines | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 7.617 | 37 | 8.887 | 7.005 | 5.747 | 6.049 | -27.03 | 18 | 18 | 18 | 15 | 12 | 10 | 11 |
| Percentage of Revenues | 0.2 | 1.2 | 0.3 | 0.3 | 0.3 | 0.3 | -1.0 | 0.8 | 0.8 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 |
| Percentage of Revenues | 0.2 | 1.2 | 0.3 | 0.3 | 0.3 | 0.3 | -1.0 | 0.8 | 0.8 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 |
| Percentage of Revenues oke:Other oke:TotalSegments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -0.764 | -0.342 | -0.438 | -0.429 | -0.327 | -0.37 | 3.946 | -1.798 | -1.704 | -1.731 | -1.252 | -0.079 | -0.043 | 0.481 |
| Percentage of Revenues | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | 0.1 | -0.1 | -0.1 | -0.1 | -0.0 | -0.0 | -0.0 | 0.0 |
| Percentage of Revenues | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | 0.1 | -0.1 | -0.1 | -0.1 | -0.0 | -0.0 | -0.0 | 0.0 |
| Percentage of Revenues oke:Other us-gaap:IntersegmentElimination | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 0.0 | -5.897 | -3.931 | -1.032 | -0.851 | -0.567 | 0.0 | 0.0 | -2.054 | 0.0 | -3.028 | 2.25 |
| Percentage of Revenues | 0.0 | -0.3 | -0.2 | -0.0 | -0.0 | -0.0 | 0.0 | 0.0 | -0.1 | 0.0 | -0.1 | 0.1 |
| Percentage of Revenues | 0.0 | -0.3 | -0.2 | -0.0 | -0.0 | -0.0 | 0.0 | 0.0 | -0.1 | 0.0 | -0.1 | 0.1 |
| Percentage of Revenues oke:ResidueNaturalGasSales us-gaap:IntersegmentElimination | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -3.506 | -3.535 | -3.566 | -3.597 | -3.627 | -3.809 | -8.068 | -2.594 | -2.463 | -2.521 | -2.647 | -2.37 | -2.495 | -2.094 |
| Percentage of Revenues | -0.1 | -0.1 | -0.1 | -0.2 | -0.2 | -0.2 | -0.3 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Percentage of Revenues | -0.1 | -0.1 | -0.1 | -0.2 | -0.2 | -0.2 | -0.3 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Percentage of Revenues oke:TransportationandStorageRevenue us-gaap:IntersegmentElimination | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 863 | 839 | 610 | 459 | 299 | 449 | 615 | 476 | 582 | 694 | 834 | 791 | 700 | 707 | 896 | 782 | 685 | 661 | 630 | 512 | 476 | 432 | 487 | 434 | 460 | 455 | 704 | 777 | 723 | 762 | 598 | 533 | 482 | 437 |
| Percentage of Revenues | 25.5 | 26.3 | 23.8 | 21.1 | 18.1 | 21.1 | 23.1 | 21.0 | 23.7 | 25.0 | 26.6 | 23.3 | 23.7 | 22.8 | 23.6 | 26.9 | 25.2 | 24.0 | 23.8 | 21.7 | 22.3 | 24.3 | 25.2 | 22.9 | 21.6 | 25.2 | 24.8 | 24.9 | 23.6 | 24.1 | 14.5 | 14.9 | 14.4 | 12.4 |
| Percentage of Revenues | 25.5 | 26.3 | 23.8 | 21.1 | 18.1 | 21.1 | 23.1 | 21.0 | 23.7 | 25.0 | 26.6 | 23.3 | 23.7 | 22.8 | 23.6 | 26.9 | 25.2 | 24.0 | 23.8 | 21.7 | 22.3 | 24.3 | 25.2 | 22.9 | 21.6 | 25.2 | 24.8 | 24.9 | 23.6 | 24.1 | 14.5 | 14.9 | 14.4 | 12.4 |
| Percentage of Revenues oke:NaturalGasGatheringAndProcessing | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 2999 | 2610 | 2151 | 1832 | 1335 | 1770 | 2247 | 1900 | 2072 | 2311 | 2601 | 3026 | 2613 | 2692 | 3382 | 2501 | 2349 | 2391 | 2277 | 2039 | 1871 | 1487 | 1623 | 1611 | 1848 | 1496 | 2433 | 2734 | 2665 | 2711 | 3147 | 2874 | 2491 | 2264 |
| Percentage of Revenues | 88.5 | 81.7 | 83.7 | 84.3 | 80.4 | 82.9 | 84.4 | 84.0 | 84.3 | 83.1 | 82.9 | 89.2 | 88.3 | 86.8 | 89.2 | 86.1 | 86.2 | 87.0 | 85.8 | 86.5 | 87.7 | 83.8 | 84.1 | 84.9 | 86.9 | 82.9 | 85.6 | 87.6 | 86.9 | 85.7 | 76.0 | 80.5 | 74.4 | 63.9 |
| Percentage of Revenues | 88.5 | 81.7 | 83.7 | 84.3 | 80.4 | 82.9 | 84.4 | 84.0 | 84.3 | 83.1 | 82.9 | 89.2 | 88.3 | 86.8 | 89.2 | 86.1 | 86.2 | 87.0 | 85.8 | 86.5 | 87.7 | 83.8 | 84.1 | 84.9 | 86.9 | 82.9 | 85.6 | 87.6 | 86.9 | 85.7 | 76.0 | 80.5 | 74.4 | 63.9 |
| Percentage of Revenues oke:NaturalGasLiquids | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 112 | 248 | 119 | 117 | 122 | 120 | 116 | 121 | 117 | 116 | 116 | 105 | 99 | 109 | 108 | 106 | 97 | 106 | 113 | 92 | 88 | 85 | 85 | 82 | 80 | 83 | 84 | 79 | 81 | 104 | 88 | 75 | 75 | 86 |
| Percentage of Revenues | 3.3 | 7.8 | 4.7 | 5.4 | 7.3 | 5.7 | 4.4 | 5.4 | 4.8 | 4.2 | 3.7 | 3.1 | 3.4 | 3.5 | 2.9 | 3.7 | 3.6 | 3.9 | 4.3 | 3.9 | 4.1 | 4.8 | 4.4 | 4.4 | 3.8 | 4.6 | 3.0 | 2.5 | 2.7 | 3.3 | 2.1 | 2.1 | 2.2 | 2.4 |
| Percentage of Revenues | 3.3 | 7.8 | 4.7 | 5.4 | 7.3 | 5.7 | 4.4 | 5.4 | 4.8 | 4.2 | 3.7 | 3.1 | 3.4 | 3.5 | 2.9 | 3.7 | 3.6 | 3.9 | 4.3 | 3.9 | 4.1 | 4.8 | 4.4 | 4.4 | 3.8 | 4.6 | 3.0 | 2.5 | 2.7 | 3.3 | 2.1 | 2.1 | 2.2 | 2.4 |
| Percentage of Revenues oke:NaturalGasPipelines | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 3975 | 3698 | 2882 | 2408 | 1757 | 2341 | 2980 | 2498 | 2772 | 3122 | 3553 | 3922 | 3414 | 3510 | 4387 | 3391 | 3133 | 3160 | 3020 | 2643 | 2436 | 2005 |
| Percentage of Revenues | 117.3 | 115.8 | 112.1 | 110.8 | 105.8 | 109.6 | 111.9 | 110.4 | 112.8 | 112.3 | 113.3 | 115.6 | 115.3 | 113.2 | 115.7 | 116.7 | 115.0 | 114.9 | 113.8 | 112.1 | 114.2 | 113.0 |
| Percentage of Revenues | 117.3 | 115.8 | 112.1 | 110.8 | 105.8 | 109.6 | 111.9 | 110.4 | 112.8 | 112.3 | 113.3 | 115.6 | 115.3 | 113.2 | 115.7 | 116.7 | 115.0 | 114.9 | 113.8 | 112.1 | 114.2 | 113.0 |
| Percentage of Revenues oke:TotalSegments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | -586.41 | -503.941 | -311.685 | -234.654 | -96.852 | -204.683 | -316.439 | -235.039 | -314.694 | -342.603 | -416.431 | -528.847 | -454.122 | -408.294 | -595.78 | -484.979 | -407.577 | -410.467 | -366.384 | -285.645 | -302.714 | -230.915 | -265.26 | -229.841 | -260.997 | -229.958 | -377.805 | -471.337 | -403.778 | -415.434 | -118.35 | -114.729 | -141.476 | -159.515 | -121.644 | -87.456 | -85.654 | -158.06 |
| Percentage of Revenues | -17.3 | -15.8 | -12.1 | -10.8 | -5.8 | -9.6 | -11.9 | -10.4 | -12.8 | -12.3 | -13.3 | -15.6 | -15.3 | -13.2 | -15.7 | -16.7 | -15.0 | -14.9 | -13.8 | -12.1 | -14.2 | -13.0 | -13.7 | -12.1 | -12.3 | -12.7 | -13.3 | -15.1 | -13.2 | -13.1 | -2.9 | -3.2 | -4.2 | -4.5 | -3.3 | -2.9 | -3.4 | -4.6 |
| Percentage of Revenues | -17.3 | -15.8 | -12.1 | -10.8 | -5.8 | -9.6 | -11.9 | -10.4 | -12.8 | -12.3 | -13.3 | -15.6 | -15.3 | -13.2 | -15.7 | -16.7 | -15.0 | -14.9 | -13.8 | -12.1 | -14.2 | -13.0 | -13.7 | -12.1 | -12.3 | -12.7 | -13.3 | -15.1 | -13.2 | -13.1 | -2.9 | -3.2 | -4.2 | -4.5 | -3.3 | -2.9 | -3.4 | -4.6 |
| Percentage of Revenues us-gaap:IntersegmentElimination | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2009-12-31 |
| Value | 23437 | 23179 | 23078 | 22780 | 22992 | 21969 | 21812 | 21335 | 19751 | 18934 | 18231 | 17911 | 16913 | 16432 | 16845 | 16764 | 16672 | 16067 | 16138 | 15982 | 15822 | 15501 | 15446 | 15508 | 15651 | 15533 | 15304 | 14312 | 14384 | 13653 | 17707 | 17610 | 15842 | 15446 | 15855 | 15364 | 13817 | 14252 | 13696 | 13171 | 13036 | 13039 | 12499 | 11929 | 12119 | 12827 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 |
| Value | 6564 | 6535 | 6499 | 6437 | 6426 | 6374 | 6795 | 6546 | 6343 | 6208 | 6078 | 5811 | 5585 | 5462 | 5495 | 5385 | 5310 | 5296 | 5320 | 5268 | 5222 | 5196 | 5123 | 5206 | 5007 | 4887 | 4727 | 4415 | 4276 | 4048 | 3949 | 3808 | 3346 | 3146 | 3040 |
| Percentage of Assets | 28.0 | 28.2 | 28.2 | 28.3 | 27.9 | 29.0 | 31.2 | 30.7 | 32.1 | 32.8 | 33.3 | 32.4 | 33.0 | 33.2 | 32.6 | 32.1 | 31.9 | 33.0 | 33.0 | 33.0 | 33.0 | 33.5 | 33.2 | 33.6 | 32.0 | 31.5 | 30.9 | 30.9 | 29.7 | 29.7 | 22.3 | 21.6 | 21.1 | 20.4 | 19.2 |
| Percentage of Assets | 28.0 | 28.2 | 28.2 | 28.3 | 27.9 | 29.0 | 31.2 | 30.7 | 32.1 | 32.8 | 33.3 | 32.4 | 33.0 | 33.2 | 32.6 | 32.1 | 31.9 | 33.0 | 33.0 | 33.0 | 33.0 | 33.5 | 33.2 | 33.6 | 32.0 | 31.5 | 30.9 | 30.9 | 29.7 | 29.7 | 22.3 | 21.6 | 21.1 | 20.4 | 19.2 |
| Percentage of Assets oke:NaturalGasGatheringAndProcessing | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 |
| Value | 14309 | 13944 | 13636 | 13449 | 13183 | 12682 | 12551 | 11662 | 10694 | 10220 | 9663 | 9632 | 8898 | 8370 | 8782 | 8515 | 8168 | 8194 | 8347 | 8257 | 8289 | 8016 | 8017 | 8041 | 8139 | 8106 | 8082 | 7337 | 7363 | 6861 | 6938 | 6610 | 6008 | 5647 | 5620 |
| Percentage of Assets | 61.1 | 60.2 | 59.1 | 59.0 | 57.3 | 57.7 | 57.5 | 54.7 | 54.1 | 54.0 | 53.0 | 53.8 | 52.6 | 50.9 | 52.1 | 50.8 | 49.0 | 51.0 | 51.7 | 51.7 | 52.4 | 51.7 | 51.9 | 51.9 | 52.0 | 52.2 | 52.8 | 51.3 | 51.2 | 50.3 | 39.2 | 37.5 | 37.9 | 36.6 | 35.4 |
| Percentage of Assets | 61.1 | 60.2 | 59.1 | 59.0 | 57.3 | 57.7 | 57.5 | 54.7 | 54.1 | 54.0 | 53.0 | 53.8 | 52.6 | 50.9 | 52.1 | 50.8 | 49.0 | 51.0 | 51.7 | 51.7 | 52.4 | 51.7 | 51.9 | 51.9 | 52.0 | 52.2 | 52.8 | 51.3 | 51.2 | 50.3 | 39.2 | 37.5 | 37.9 | 36.6 | 35.4 |
| Percentage of Assets oke:NaturalGasLiquids | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 |
| Value | 2110 | 2096 | 2100 | 2082 | 2064 | 2089 | 2094 | 2083 | 2083 | 2138 | 2131 | 2109 | 2073 | 2060 | 2055 | 2040 | 1951 | 1945 | 1946 | 1912 | 1856 | 1847 | 1844 | 1837 | 1841 | 1807 | 1823 | 1832 | 1852 | 1848 | 1817 | 1786 | 1792 | 1799 | 1812 |
| Percentage of Assets | 9.0 | 9.0 | 9.1 | 9.1 | 9.0 | 9.5 | 9.6 | 9.8 | 10.6 | 11.3 | 11.7 | 11.8 | 12.3 | 12.5 | 12.2 | 12.2 | 11.7 | 12.1 | 12.1 | 12.0 | 11.7 | 11.9 | 11.9 | 11.9 | 11.8 | 11.6 | 11.9 | 12.8 | 12.9 | 13.5 | 10.3 | 10.1 | 11.3 | 11.6 | 11.4 |
| Percentage of Assets | 9.0 | 9.0 | 9.1 | 9.1 | 9.0 | 9.5 | 9.6 | 9.8 | 10.6 | 11.3 | 11.7 | 11.8 | 12.3 | 12.5 | 12.2 | 12.2 | 11.7 | 12.1 | 12.1 | 12.0 | 11.7 | 11.9 | 11.9 | 11.9 | 11.8 | 11.6 | 11.9 | 12.8 | 12.9 | 13.5 | 10.3 | 10.1 | 11.3 | 11.6 | 11.4 |
| Percentage of Assets oke:NaturalGasPipelines | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2014-12-31 |
| Value | 22984 | 22576 | 22236 | 21969 | 21673 | 21146 | 21441 | 20292 | 19122 | 18568 | 17873 | 17553 | 16556 | 15893 | 16332 | 15941 | 15430 | 15436 | 15614 | 15438 | 15367 | 15059 | 14993 | 14890 |
| Percentage of Assets | 98.1 | 97.4 | 96.3 | 96.4 | 94.3 | 96.3 | 98.3 | 95.1 | 96.8 | 98.1 | 98.0 | 98.0 | 97.9 | 96.7 | 97.0 | 95.1 | 92.6 | 96.1 | 96.8 | 96.6 | 97.1 | 97.2 | 97.1 | 97.3 |
| Percentage of Assets | 98.1 | 97.4 | 96.3 | 96.4 | 94.3 | 96.3 | 98.3 | 95.1 | 96.8 | 98.1 | 98.0 | 98.0 | 97.9 | 96.7 | 97.0 | 95.1 | 92.6 | 96.1 | 96.8 | 96.6 | 97.1 | 97.2 | 97.1 | 97.3 |
| Percentage of Assets oke:TotalSegments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 |
| Value | 452 | 603 | 842 | 811 | 1318 | 822 | 370 | 1043 | 629 | 366 | 357 | 358 | 356 | 538 | 513 | 823 | 1241 | 630 | 523 | 543 | 455 | 441 | 460 | 422 | 662 | 730 | 670 | 726 | 891 | 894 | 639 | 786 | 804 | 892 | 867 | 862 | 737 | 868 | 794 |
| Percentage of Assets | 1.9 | 2.6 | 3.7 | 3.6 | 5.7 | 3.7 | 1.7 | 4.9 | 3.2 | 1.9 | 2.0 | 2.0 | 2.1 | 3.3 | 3.0 | 4.9 | 7.4 | 3.9 | 3.2 | 3.4 | 2.9 | 2.8 | 3.0 | 2.7 | 4.2 | 4.7 | 4.4 | 5.1 | 6.2 | 6.6 | 3.6 | 4.5 | 5.1 | 5.8 | 5.5 | 5.6 | 5.3 | 6.1 | 5.8 |
| Percentage of Assets | 1.9 | 2.6 | 3.7 | 3.6 | 5.7 | 3.7 | 1.7 | 4.9 | 3.2 | 1.9 | 2.0 | 2.0 | 2.1 | 3.3 | 3.0 | 4.9 | 7.4 | 3.9 | 3.2 | 3.4 | 2.9 | 2.8 | 3.0 | 2.7 | 4.2 | 4.7 | 4.4 | 5.1 | 6.2 | 6.6 | 3.6 | 4.5 | 5.1 | 5.8 | 5.5 | 5.6 | 5.3 | 6.1 | 5.8 |
| Percentage of Assets us-gaap:IntersegmentElimination | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 23437 | 23179 | 23078 | 22780 | 22992 | 21969 | 21812 | 21335 | 19751 | 18934 | 18231 | 17911 | 16913 | 16432 | 16845 | 16764 | 16672 | 16067 | 16138 | 15982 | 15822 | 15501 | 15446 | 15508 | 15651 | 15533 | 15304 | 14312 | 14384 | 13653 | 17707 | 17610 | 15842 | 15446 | 15855 | 15364 | 13817 | 14252 | 13696 | 13171 | 13036 | 13039 | 12499 | 12827 |
| Percentage of LiabilitiesAndStockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 5910 | 6096 | 6042 | 6146 | 6240 | 5560 | 6225 | 6218 | 6348 | 6442 | 6579 | 6652 | 6664 | 6701 | 5527 | 5359 | 5407 | 238 | 188 | 214 | 237 | 286 | 335 | 414 | 517 | 530 | 592 | 623 | 656 | 584 | 2337 | 2189 | 2085 | 2134 | 2129 | 2065 | 2089 | 2256 | 2238 | 2185 | 2217 | 2499 | 2448 | 2207 |
| Percentage of StockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 25.2 | 26.3 | 26.2 | 27.0 | 27.1 | 25.3 | 28.5 | 29.1 | 32.1 | 34.0 | 36.1 | 37.1 | 39.4 | 40.8 | 32.8 | 32.0 | 32.4 | 1.5 | 1.2 | 1.3 | 1.5 | 1.9 | 2.2 | 2.7 | 3.3 | 3.4 | 3.9 | 4.4 | 4.6 | 4.3 | 13.2 | 12.4 | 13.2 | 13.8 | 13.4 | 13.4 | 15.1 | 15.8 | 16.3 | 16.6 | 17.0 | 19.2 | 19.6 | 17.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | -601.443 | -465.596 | -551.449 | -530.618 | -524.903 | -499.386 | -374.0 | -421.104 | -336.396 | -269.524 | -188.239 | -158.138 | -178.589 |
| Percentage of StockholdersEquity | -10.2 | -7.6 | -9.1 | -8.6 | -8.4 | -9.0 | -6.0 | -6.8 | -5.3 | -4.2 | -2.9 | -2.4 | -2.7 |
| Percentage of Assets | -2.6 | -2.0 | -2.4 | -2.3 | -2.3 | -2.3 | -1.7 | -2.0 | -1.7 | -1.4 | -1.0 | -0.9 | -1.1 |
| Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 7247 | 7305 | 7353 | 7448 | 7549 | 6989 | 7403 | 7448 | 7495 | 7527 | 7615 | 7662 | 7699 |
| Percentage of StockholdersEquity | 122.6 | 119.8 | 121.7 | 121.2 | 121.0 | 125.7 | 118.9 | 119.8 | 118.1 | 116.9 | 115.7 | 115.2 | 115.5 |
| Percentage of Assets | 30.9 | 31.5 | 31.9 | 32.7 | 32.8 | 31.8 | 33.9 | 34.9 | 37.9 | 39.8 | 41.8 | 42.8 | 45.5 |
| Percentage of Assets us-gaap:AdditionalPaidInCapital | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 4.749 | 4.749 | 4.749 | 4.749 | 4.749 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 |
| Percentage of StockholdersEquity | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:CommonStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | -740.254 | -747.462 | -764.298 | -776.503 | -781.489 | -792.019 | -808.394 | -812.539 | -815.376 | -820.767 | -851.806 | -856.227 | -860.935 |
| Percentage of StockholdersEquity | -12.5 | -12.3 | -12.6 | -12.6 | -12.5 | -14.2 | -13.0 | -13.1 | -12.8 | -12.7 | -12.9 | -12.9 | -12.9 |
| Percentage of Assets | -3.2 | -3.2 | -3.3 | -3.4 | -3.4 | -3.6 | -3.7 | -3.8 | -4.1 | -4.3 | -4.7 | -4.8 | -5.1 |
| Percentage of Assets us-gaap:TreasuryStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 2235 | 1997 | 1869 | 1721 | 2179 | 1488 | 1470 | 1967 | 1401 | 1342 | 1398 | 1807 | 1433 | 1290 | 1764 | 1518 | 1447 | 1378 | 1429 | 1369 | 1281 | 991 | 975 | 952 | 1263 | 1321 | 1307 | 1712 | 2059 | 1656 | 2370 | 2882 | 1889 | 1949 | 2764 | 2956 | 1807 | 2609 | 2318 | 2312 | 2529 | 2795 | 2379 | 2588 |
| Percentage of AssetsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 9.5 | 8.6 | 8.1 | 7.6 | 9.5 | 6.8 | 6.7 | 9.2 | 7.1 | 7.1 | 7.7 | 10.1 | 8.5 | 7.9 | 10.5 | 9.1 | 8.7 | 8.6 | 8.9 | 8.6 | 8.1 | 6.4 | 6.3 | 6.1 | 8.1 | 8.5 | 8.5 | 12.0 | 14.3 | 12.1 | 13.4 | 16.4 | 11.9 | 12.6 | 17.4 | 19.2 | 13.1 | 18.3 | 16.9 | 17.6 | 19.4 | 21.4 | 19.0 | 20.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 374 | 402 | 524 | 447 | 945 | 531 | 20 | 673 | 273 | 27 | 11 | 84 | 15 | 17 | 37 | 11 | 332 | 310 | 248 | 237 | 180 | 137 | 97 | 38 | 226 | 239 | 172 | 151 | 358 | 210 | 149 | 779 | 33 | 143 | 583 | 978 | 114 | 781 | 65 | 148 | 477 | 870 | 31 | 50 | 103 | 167 | 29 | 510 | 19 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.6 | 1.7 | 2.3 | 2.0 | 4.1 | 2.4 | 0.1 | 3.2 | 1.4 | 0.1 | 0.1 | 0.5 | 0.1 | 0.1 | 0.2 | 0.1 | 2.0 | 1.9 | 1.5 | 1.5 | 1.1 | 0.9 | 0.6 | 0.2 | 1.4 | 1.5 | 1.1 | 1.1 | 2.5 | 1.5 | 0.8 | 4.4 | 0.2 | 0.9 | 3.7 | 6.4 | 0.8 | 5.5 | 0.5 | 1.1 | 3.7 | 6.7 | 0.2 | 0.4 | 0.9 | 0.0 | 0.2 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 1091 | 909 | 829 | 717 | 608 | 497 | 835 | 718 | 669 | 812 | 818 | 1085 | 934 | 844 | 1202 | 939 | 749 | 734 | 872 | 737 | 672 | 521 | 593 | 586 | 684 | 628 | 745 | 971 | 1097 | 883 | 1549 | 1166 | 1158 | 1261 | 1349 | 984 | 793 | 1154 | 1339 | 1141 | 1125 | 1280 | 1332 | 1437 |
| Percentage of ReceivablesNetCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 4.7 | 3.9 | 3.6 | 3.2 | 2.6 | 2.3 | 3.8 | 3.4 | 3.4 | 4.3 | 4.5 | 6.1 | 5.5 | 5.1 | 7.1 | 5.6 | 4.5 | 4.6 | 5.4 | 4.6 | 4.2 | 3.4 | 3.8 | 3.8 | 4.4 | 4.0 | 4.9 | 6.8 | 7.6 | 6.5 | 8.8 | 6.6 | 7.3 | 8.2 | 8.5 | 6.4 | 5.7 | 8.1 | 9.8 | 8.7 | 8.6 | 9.8 | 10.7 | 11.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 454 | 369 | 227 | 300 | 201 | 131 | 304 | 283 | 184 | 243 | 296 | 426 | 285 | 185 | 342 | 314 | 200 | 193 | 140 | 217 | 245 | 156 | 128 | 142 | 150 | 218 | 134 | 338 | 335 | 231 | 417 | 664 | 434 | 302 | 517 | 644 | 561 | 299 | 549 | 658 | 574 | 407 | 708 | 583 |
| Percentage of InventoryNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.9 | 1.6 | 1.0 | 1.3 | 0.9 | 0.6 | 1.4 | 1.3 | 0.9 | 1.3 | 1.6 | 2.4 | 1.7 | 1.1 | 2.0 | 1.9 | 1.2 | 1.2 | 0.9 | 1.4 | 1.6 | 1.0 | 0.8 | 0.9 | 1.0 | 1.4 | 0.9 | 2.4 | 2.3 | 1.7 | 2.4 | 3.8 | 2.7 | 2.0 | 3.3 | 4.2 | 4.1 | 2.1 | 4.0 | 5.0 | 4.4 | 3.1 | 5.7 | 4.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 154 | 155 | 132 | 83 | 92 | 59 | 82 | 79 | 69 | 56 | 100 | 61 | 57 | 106 | 53 | 64 | 51 | 108 | 45 | 50 | 58 | 54 | 39 | 76 | 155 | 175 | 173 | 119 | 118 | 102 | 171 | 160 | 163 | 154 | 175 | 220 | 208 | 155 | 185 | 202 | 161 | 106 | 149 | 238 |
| Percentage of OtherAssetsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.7 | 0.7 | 0.6 | 0.4 | 0.4 | 0.3 | 0.4 | 0.4 | 0.4 | 0.3 | 0.6 | 0.3 | 0.3 | 0.6 | 0.3 | 0.4 | 0.3 | 0.7 | 0.3 | 0.3 | 0.4 | 0.3 | 0.3 | 0.5 | 1.0 | 1.1 | 1.1 | 0.8 | 0.8 | 0.7 | 1.0 | 0.9 | 1.0 | 1.0 | 1.1 | 1.4 | 1.5 | 1.1 | 1.4 | 1.5 | 1.2 | 0.8 | 1.2 | 1.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 23393 | 23192 | 23072 | 22803 | 22622 | 22136 | 22051 | 20948 | 19806 | 18887 | 18030 | 17120 | 16363 | 15838 | 15559 | 15364 | 15241 | 15154 | 15078 | 14943 | 14811 | 14671 | 14530 | 14457 | 14175 | 13908 | 13602 | 12173 | 11737 | 11313 | 15536 | 14944 | 14085 | 13560 | 13088 | 12404 | 11953 | 11495 | 11177 | 10709 | 10350 | 10036 | 9854 | 10145 |
| Percentage of PropertyPlantAndEquipmentGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 99.8 | 100.1 | 100.0 | 100.1 | 98.4 | 100.8 | 101.1 | 98.2 | 100.3 | 99.8 | 98.9 | 95.6 | 96.7 | 96.4 | 92.4 | 91.6 | 91.4 | 94.3 | 93.4 | 93.5 | 93.6 | 94.7 | 94.1 | 93.2 | 90.6 | 89.5 | 88.9 | 85.1 | 81.6 | 82.9 | 87.7 | 84.9 | 88.9 | 87.8 | 82.6 | 80.7 | 86.5 | 80.7 | 81.6 | 81.3 | 79.4 | 77.0 | 78.8 | 79.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 1265 | 1645 | 797 | 362 | 371 | 691 | 1236 | 1112 | 881 |
| Percentage of PropertyPlantAndEquipmentGross | 5.5 | 7.5 | 4.4 | 2.3 | 2.5 | 4.8 | 9.1 | 7.2 | 6.7 |
| Percentage of Assets | 5.5 | 7.5 | 4.4 | 2.2 | 2.3 | 4.5 | 8.1 | 6.3 | 5.6 |
| Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:ConstructionInProgress | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 798 | 684 | 656 | 604 | 558 | 456 | 478 | 362 | 335 |
| Percentage of PropertyPlantAndEquipmentGross | 3.5 | 3.1 | 3.6 | 3.9 | 3.7 | 3.1 | 3.5 | 2.3 | 2.6 |
| Percentage of Assets | 3.5 | 3.1 | 3.6 | 3.6 | 3.5 | 3.0 | 3.1 | 2.0 | 2.1 |
| Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:Containers | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 5084 | 4439 | 4171 | 3873 | 3831 | 3627 | 2880 | 2295 | 1625 |
| Percentage of PropertyPlantAndEquipmentGross | 22.0 | 20.1 | 23.1 | 24.9 | 25.4 | 25.0 | 21.2 | 14.8 | 12.4 |
| Percentage of Assets | 22.0 | 20.4 | 22.9 | 23.0 | 23.7 | 23.5 | 18.8 | 13.0 | 10.2 |
| Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:GasGatheringAndProcessingEquipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 647 | 610 | 547 | 504 | 487 | 407 | 364 | 402 | 348 |
| Percentage of PropertyPlantAndEquipmentGross | 2.8 | 2.8 | 3.0 | 3.2 | 3.2 | 2.8 | 2.7 | 2.6 | 2.7 |
| Percentage of Assets | 2.8 | 2.8 | 3.0 | 3.0 | 3.0 | 2.6 | 2.4 | 2.3 | 2.2 |
| Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:ManufacturingFacility | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 810 | 797 | 782 | 700 | 689 | 416 | 518 | 302 | 311 |
| Percentage of PropertyPlantAndEquipmentGross | 3.5 | 3.6 | 4.3 | 4.5 | 4.6 | 2.9 | 3.8 | 1.9 | 2.4 |
| Percentage of Assets | 3.5 | 3.7 | 4.3 | 4.2 | 4.3 | 2.7 | 3.4 | 1.7 | 2.0 |
| Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:OtherTransportationEquipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 4143 | 4316 | 3851 | 3613 | 3352 | 2961 | 2449 | 2173 | 1638 |
| Percentage of PropertyPlantAndEquipmentGross | 18.0 | 19.6 | 21.4 | 23.2 | 22.2 | 20.4 | 18.0 | 14.0 | 12.5 |
| Percentage of Assets | 18.0 | 19.8 | 21.1 | 21.4 | 20.8 | 19.2 | 16.0 | 12.3 | 10.3 |
| Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:Pipelines | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 247 | 1802 | 1002 | 83 | 62 | 83 | 194 | 822 | 703 |
| Percentage of PropertyPlantAndEquipmentGross | 1.1 | 8.2 | 5.6 | 0.5 | 0.4 | 0.6 | 1.4 | 5.3 | 5.4 |
| Percentage of Assets | 1.1 | 8.3 | 5.5 | 0.5 | 0.4 | 0.5 | 1.3 | 4.6 | 4.4 |
| Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:ConstructionInProgress | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 9.18 | 9.18 | 8.987 | 12 | 13 | 76 | 115 | 135 | 136 |
| Percentage of PropertyPlantAndEquipmentGross | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.5 | 0.9 | 0.9 | 1.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.5 | 0.8 | 0.8 | 0.9 |
| Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:Containers | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 8423 | 6126 | 4677 | 4340 | 4309 | 4208 | 3822 | 2049 | 1490 |
| Percentage of PropertyPlantAndEquipmentGross | 36.5 | 27.8 | 25.9 | 27.9 | 28.6 | 29.0 | 28.1 | 13.2 | 11.4 |
| Percentage of Assets | 36.5 | 28.1 | 25.7 | 25.8 | 26.7 | 27.2 | 25.0 | 11.6 | 9.4 |
| Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:GasTransmissionAndDistributionEquipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 1569 | 1552 | 1475 | 1406 | 1345 | 1507 | 1478 | 1850 | 1796 |
| Percentage of PropertyPlantAndEquipmentGross | 6.8 | 7.0 | 8.2 | 9.0 | 8.9 | 10.4 | 10.9 | 11.9 | 13.7 |
| Percentage of Assets | 6.8 | 7.1 | 8.1 | 8.4 | 8.3 | 9.8 | 9.7 | 10.5 | 11.3 |
| Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:GasTransmissionEquipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 72 | 66 | 61 | 57 | 54 | 94 | 63 | 324 | 309 |
| Percentage of PropertyPlantAndEquipmentGross | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.7 | 0.5 | 2.1 | 2.4 |
| Percentage of Assets | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.6 | 0.4 | 1.8 | 1.9 |
| Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:ManufacturingFacility | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 4211 | 4067 | 3918 | 3773 | 3641 | 3506 | 3702 | 3585 | 3470 | 3369 | 3264 | 3159 | 3059 | 2960 | 2861 | 2785 | 2694 | 2600 | 2507 | 2416 | 2326 | 2234 | 2156 | 2178 | 2099 | 2017 | 1940 | 1931 | 1866 | 1802 | 3238 | 3173 | 3105 | 3039 | 2974 | 2914 | 2855 | 2794 | 2733 | 2690 | 2637 | 2597 | 2541 | 2352 |
| Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 18.0 | 17.5 | 17.0 | 16.6 | 15.8 | 16.0 | 17.0 | 16.8 | 17.6 | 17.8 | 17.9 | 17.6 | 18.1 | 18.0 | 17.0 | 16.6 | 16.2 | 16.2 | 15.5 | 15.1 | 14.7 | 14.4 | 14.0 | 14.0 | 13.4 | 13.0 | 12.7 | 13.5 | 13.0 | 13.2 | 18.3 | 18.0 | 19.6 | 19.7 | 18.8 | 19.0 | 20.7 | 19.6 | 20.0 | 20.4 | 20.2 | 19.9 | 20.3 | 18.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 2.451 | 1.32 | 1.037 | 0.754 | 0.471 |
| Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 2514 | 2471 | 2168 | 1888 | 1641 | 1325 | 1221 | 1112 | 954 |
| Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 64.2 | 66.8 | 66.4 | 66.0 | 65.5 | 61.4 | 63.0 | 34.3 | 32.1 |
| Percentage of Assets | 10.9 | 11.3 | 11.9 | 11.2 | 10.2 | 8.6 | 8.0 | 6.3 | 6.0 |
| Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 1403 | 1231 | 1095 | 973 | 865 | 831 | 718 | 2126 | 2020 |
| Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 35.8 | 33.2 | 33.6 | 34.0 | 34.5 | 38.6 | 37.0 | 65.7 | 67.9 |
| Percentage of Assets | 6.1 | 5.6 | 6.0 | 5.8 | 5.4 | 5.4 | 4.7 | 12.0 | 12.7 |
| Percentage of Assets oke:RegulatedPropertyPlantAndEquipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 19181 | 19125 | 19154 | 19029 | 18981 | 18629 | 18348 | 17362 | 16336 | 15518 | 14766 | 13960 | 13303 | 12878 | 12698 | 12578 | 12546 | 12553 | 12571 | 12526 | 12484 | 12437 | 12373 | 12278 | 12075 | 11891 | 11662 | 10242 | 9870 | 9510 | 12297 | 11770 | 10979 | 10521 | 10114 | 9490 | 9098 | 8701 | 8444 | 8019 | 7712 | 7438 | 7313 | 7793 |
| Percentage of PropertyPlantAndEquipmentNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 81.8 | 82.5 | 83.0 | 83.5 | 82.6 | 84.8 | 84.1 | 81.4 | 82.7 | 82.0 | 81.0 | 77.9 | 78.7 | 78.4 | 75.4 | 75.0 | 75.3 | 78.1 | 77.9 | 78.4 | 78.9 | 80.2 | 80.1 | 79.2 | 77.2 | 76.6 | 76.2 | 71.6 | 68.6 | 69.7 | 69.4 | 66.8 | 69.3 | 68.1 | 63.8 | 61.8 | 65.8 | 61.1 | 61.7 | 60.9 | 59.2 | 57.0 | 58.5 | 60.8 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 527 | 527 | 527 | 527 | 680 | 681 | 681 | 525 | 525 | 525 | 683 | 591 | 601 | 602 |
| Percentage of Goodwill | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.3 | 2.3 | 2.3 | 2.4 | 3.1 | 3.7 | 4.0 | 3.3 | 3.4 | 3.4 | 3.9 | 3.7 | 4.4 | 4.8 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 |
| Value | 371 | 371 | 371 | 371 | 371 | 371 | 268 | 268 | 268 | 268 |
| Percentage of Goodwill | 70.4 | 70.4 | 70.4 | 54.5 | 54.5 | 54.5 | 51.1 | 51.1 | 51.1 | 39.3 |
| Percentage of Assets | 1.6 | 1.6 | 1.7 | 1.7 | 2.0 | 2.2 | 1.7 | 1.7 | 1.8 | 1.5 |
| Percentage of Assets oke:NaturalGasLiquids | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 |
| Value | 156 | 156 | 156 | 156 | 156 | 156 | 134 | 134 | 134 | 134 |
| Percentage of Goodwill | 29.6 | 29.6 | 29.6 | 23.0 | 23.0 | 23.0 | 25.6 | 25.6 | 25.6 | 19.7 |
| Percentage of Assets | 0.7 | 0.7 | 0.7 | 0.7 | 0.9 | 0.9 | 0.8 | 0.9 | 0.9 | 0.8 |
| Percentage of Assets oke:NaturalGasPipelines | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 246 | 276 | 286 | 312 | 479 | 491 | 489 |
| Percentage of IntangibleAssetsNetExcludingGoodwill | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.1 | 1.3 | 1.6 | 1.9 | 3.0 | 3.2 | 3.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2012-12-31 |
| Value | 768 | 771 | 773 | 776 | 778 | 781 | 957 | 960 | 963 | 964 | 967 | 970 | 987 | 990 | 993 | 996 | 999 | 1002 | 1005 | 1008 | 1011 | 1014 | 1017 | 1020 | 1023 | 1011 | 1014 | 1017 | 1018 | 1021 | 1182 | 990 | 992 | 996 |
| Percentage of IntangibleAssetsNetIncludingGoodwill | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 3.3 | 3.3 | 3.4 | 3.4 | 3.4 | 3.6 | 4.4 | 4.5 | 4.9 | 5.1 | 5.3 | 5.4 | 5.8 | 6.0 | 5.9 | 5.9 | 6.0 | 6.2 | 6.2 | 6.3 | 6.4 | 6.5 | 6.6 | 6.6 | 6.5 | 6.5 | 6.6 | 7.1 | 7.1 | 7.5 | 6.7 | 5.6 | 6.3 | 6.3 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 16 | 16 | 17 |
| Percentage of OperatingLeaseRightOfUseAsset | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 |
| Percentage of Assets oke:CertainOperatingLeasesEnteredIntoDuringThePeriod | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 100 | 15 | 16 | 17 | 16 |
| Percentage of OperatingLeaseRightOfUseAsset | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets | 0.4 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 69 | 70 | 72 | 74 |
| Percentage of OperatingLeaseRightOfUseAsset | 0.0 | 436.4 | 435.5 | 430.2 |
| Percentage of Assets | 0.3 | 0.3 | 0.3 | 0.3 |
| Percentage of Assets oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 451 | 478 | 475 | 463 | 262 | 259 | 173 | 174 | 169 | 158 | 130 | 191 | 170 | 159 | 180 | 182 | 170 | 176 | 162 | 121 | 118 | 112 | 112 | 115 | 129 | 167 | 167 | 184 | 193 | 202 | 626 | 765 | 772 | 760 | 758 | 701 | 701 | 720 | 695 | 575 | 588 | 595 | 594 | 626 |
| Percentage of OtherAssetsNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.9 | 2.1 | 2.1 | 2.0 | 1.1 | 1.2 | 0.8 | 0.8 | 0.9 | 0.8 | 0.7 | 1.1 | 1.0 | 1.0 | 1.1 | 1.1 | 1.0 | 1.1 | 1.0 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.8 | 1.1 | 1.1 | 1.3 | 1.3 | 1.5 | 3.5 | 4.3 | 4.9 | 4.9 | 4.8 | 4.6 | 5.1 | 5.1 | 5.1 | 4.4 | 4.5 | 4.6 | 4.8 | 4.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 1052 | 929 | 719 | 624 | 755 | 742 | 1209 | 1129 | 907 | 1027 | 1118 | 1339 | 1027 | 773 | 1140 | 922 | 696 | 703 | 874 | 711 | 697 | 522 | 615 | 620 | 694 | 721 | 891 | 1221 | 1271 | 1155 | 1503 | 1382 | 1214 | 1205 | 1333 | 1153 | 911 | 1110 | 1341 | 1241 | 1194 | 1131 | 1215 | 1240 |
| Percentage of AccountsPayableCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 4.5 | 4.0 | 3.1 | 2.7 | 3.3 | 3.4 | 5.5 | 5.3 | 4.6 | 5.4 | 6.1 | 7.5 | 6.1 | 4.7 | 6.8 | 5.5 | 4.2 | 4.4 | 5.4 | 4.5 | 4.4 | 3.4 | 4.0 | 4.0 | 4.4 | 4.6 | 5.8 | 8.5 | 8.8 | 8.5 | 8.5 | 7.9 | 7.7 | 7.8 | 8.4 | 7.5 | 6.6 | 7.8 | 9.8 | 9.4 | 9.2 | 8.7 | 9.7 | 9.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2018-01-01 |
| Value | 35 | 15 | 23 | 27 | 31 | 11 | 22 | 25 | 30 | 10 | 15 | 23 | 27 | 6.0 | 19 |
| Percentage of ContractWithCustomerLiabilityCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.2 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 2394 | 2047 | 1344 | 1094 | 1273 | 1091 | 2020 | 1567 | 1737 | 1689 | 2108 | 2450 | 2572 | 2050 | 2667 | 2741 | 2860 | 2731 | 2836 | 2341 | 2188 | 1764 | 1638 | 1960 | 2606 | 2548 | 2392 | 1781 | 1851 | 1891 | 2696 | 2621 | 2648 | 2337 | 2812 | 2439 | 2256 | 2600 | 3246 | 2976 | 2840 | 2301 | 3151 | 3338 |
| Percentage of LiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 10.2 | 8.8 | 5.8 | 4.8 | 5.5 | 5.0 | 9.3 | 7.3 | 8.8 | 8.9 | 11.6 | 13.7 | 15.2 | 12.5 | 15.8 | 16.4 | 17.2 | 17.0 | 17.6 | 14.7 | 13.8 | 11.4 | 10.6 | 12.6 | 16.7 | 16.4 | 15.6 | 12.5 | 12.9 | 13.9 | 15.2 | 14.9 | 16.7 | 15.1 | 17.7 | 15.9 | 16.3 | 18.2 | 23.7 | 22.6 | 21.8 | 17.7 | 25.2 | 26.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 536 | 543 | 7.65 | 7.65 | 7.65 | 7.65 | 7.65 | 7.65 | 307 | 307 | 507 | 507 | 932 | 932 | 432 | 432 | 494 | 410 | 410 | 460 | 460 | 460 | 110 | 660 | 660 | 660 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 12 | 364 | 364 | 365 | 368 | 418 | 643 | 268 |
| Percentage of LongTermDebtCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.3 | 2.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.6 | 1.6 | 2.8 | 2.8 | 5.5 | 5.7 | 2.6 | 2.6 | 3.0 | 2.6 | 2.5 | 2.9 | 2.9 | 3.0 | 0.7 | 4.3 | 4.2 | 4.3 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 2.6 | 2.7 | 2.8 | 2.8 | 3.2 | 5.1 | 2.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 14 | 13 | 13 | 13 | 13 | 13 | 1.883 |
| Percentage of OperatingLeaseLiabilityCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 13 | 1.883 |
| Percentage of OperatingLeaseLiabilityCurrent | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.0 |
| Percentage of Assets oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 208 | 145 | 83 | 78 | 93 | 89 | 285 | 123 | 252 | 119 | 211 | 208 | 184 | 122 | 179 | 166 | 167 | 122 | 166 | 214 | 202 | 126 | 132 | 157 | 256 | 208 | 285 | 120 | 190 | 127 | 401 | 433 | 388 | 357 | 369 | 358 | 396 | 410 | 345 | 352 | 392 | 450 | 424 | 488 |
| Percentage of OtherLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.9 | 0.6 | 0.4 | 0.3 | 0.4 | 0.4 | 1.3 | 0.6 | 1.3 | 0.6 | 1.2 | 1.2 | 1.1 | 0.7 | 1.1 | 1.0 | 1.0 | 0.8 | 1.0 | 1.3 | 1.3 | 0.8 | 0.9 | 1.0 | 1.6 | 1.3 | 1.9 | 0.8 | 1.3 | 0.9 | 2.3 | 2.5 | 2.5 | 2.3 | 2.3 | 2.3 | 2.9 | 2.9 | 2.5 | 2.7 | 3.0 | 3.5 | 3.4 | 3.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2018-12-31 |
| Value | 94 | 65 | 89 | 103 | 77 | 61 | 75 | 79 | 61 |
| Percentage of TaxesPayableCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.4 | 0.3 | 0.4 | 0.5 | 0.3 | 0.3 | 0.3 | 0.4 | 0.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2012-12-31 |
| Value | 14200 | 14200 | 14200 | 14300 | 14300 | 14200 | 12500 | 12500 | 11100 | 10300 | 9400 | 8800 | 8000 | 8000 | 8500 | 8500 | 8300 | 8300 | 8300 | 8800 | 8800 | 8800 | 8400 | 8400 | 8000 | 8000 | 7200 | 7200 | 7200 | 7200 | 7800 | 7800 | 6500 | 6500 |
| Percentage of LongTermDebt | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 60.6 | 61.3 | 61.5 | 62.8 | 62.2 | 64.6 | 57.3 | 58.6 | 56.2 | 54.4 | 51.6 | 49.1 | 47.3 | 48.7 | 50.5 | 50.7 | 49.8 | 51.7 | 51.4 | 55.1 | 55.6 | 56.8 | 54.4 | 54.2 | 51.1 | 51.5 | 47.0 | 50.3 | 50.1 | 52.7 | 44.0 | 44.3 | 41.0 | 41.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 13637 | 13638 | 14228 | 14249 | 14276 | 14146 | 12479 | 12479 | 10754 | 10004 | 8873 | 8325 | 7091 | 7091 | 8091 | 8092 | 7835 | 7919 | 7919 | 8320 | 8320 | 8320 | 8323 | 7773 | 7291 | 7339 | 7192 | 7194 | 7196 | 7199 | 7754 | 7757 | 6511 | 6513 | 6515 | 6517 | 5224 | 5225 | 4529 | 4532 | 4622 | 4976 | 3686 | 4334 |
| Percentage of LongTermDebtNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 58.2 | 58.8 | 61.7 | 62.5 | 62.1 | 64.4 | 57.2 | 58.5 | 54.4 | 52.8 | 48.7 | 46.5 | 41.9 | 43.2 | 48.0 | 48.3 | 47.0 | 49.3 | 49.1 | 52.1 | 52.6 | 53.7 | 53.9 | 50.1 | 46.6 | 47.3 | 47.0 | 50.3 | 50.0 | 52.7 | 43.8 | 44.0 | 41.1 | 42.2 | 41.1 | 42.4 | 37.8 | 36.7 | 33.1 | 34.4 | 35.5 | 38.2 | 29.5 | 33.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 881 | 814 | 669 | 582 | 475 | 442 | 536 | 418 | 347 | 270 | 219 | 132 | 54 | 53 | 52 | 76 | 73 | 1612 | 1623 | 1573 | 1518 | 1484 | 1436 | 1437 | 1451 | 1430 | 1395 | 1303 | 1253 | 1144 | 1938 | 1776 | 1716 | 1678 | 1592 | 1539 | 1457 | 1408 | 1446 | 1386 | 1288 | 1223 | 1171 | 1037 |
| Percentage of DeferredTaxLiabilitiesNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 3.8 | 3.5 | 2.9 | 2.6 | 2.1 | 2.0 | 2.5 | 2.0 | 1.8 | 1.4 | 1.2 | 0.7 | 0.3 | 0.3 | 0.3 | 0.5 | 0.4 | 10.0 | 10.1 | 9.8 | 9.6 | 9.6 | 9.3 | 9.3 | 9.3 | 9.2 | 9.1 | 9.1 | 8.7 | 8.4 | 10.9 | 10.1 | 10.8 | 10.9 | 10.0 | 10.0 | 10.6 | 9.9 | 10.6 | 10.5 | 9.9 | 9.4 | 9.4 | 8.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 33 | 13 | 16 | 23 | 25 |
| Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 |
| Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 199 | 183 | 171 | 171 | 162 |
| Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent | 592.4 | 1384.6 | 1071.0 | 718.6 | 642.4 |
| Percentage of Assets | 0.9 | 0.8 | 0.9 | 1.0 | 1.0 |
| Percentage of Assets us-gaap:PensionPlansDefinedBenefit | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 531 | 496 | 706 | 618 | 632 | 631 | 525 | 626 | 538 | 501 | 450 | 350 | 357 | 366 | 348 | 339 | 337 | 334 | 321 | 296 | 293 | 273 | 264 | 278 | 276 | 290 | 281 | 229 | 237 | 229 | 472 | 763 | 791 | 712 | 701 | 692 | 672 | 638 | 674 | 592 | 584 | 575 | 566 | 662 |
| Percentage of OtherLiabilitiesNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.3 | 2.1 | 3.1 | 2.7 | 2.8 | 2.9 | 2.4 | 2.9 | 2.7 | 2.7 | 2.5 | 2.0 | 2.1 | 2.2 | 2.1 | 2.0 | 2.0 | 2.1 | 2.0 | 1.9 | 1.9 | 1.8 | 1.7 | 1.8 | 1.8 | 1.9 | 1.8 | 1.6 | 1.7 | 1.7 | 2.7 | 4.3 | 5.0 | 4.6 | 4.4 | 4.5 | 4.9 | 4.5 | 4.9 | 4.5 | 4.5 | 4.4 | 4.5 | 5.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 81 | 85 | 87 | 90 | 93 | 96 | 13 |
| Percentage of OperatingLeaseLiabilityNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.3 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 87 | 13 |
| Percentage of OperatingLeaseLiabilityNoncurrent | 100.0 | 100.0 |
| Percentage of Assets | 0.4 | 0.1 |
| Percentage of Assets oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 15 | 16 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 |
| Percentage of Assets oke:MaturityofOperatingLeaseLiabilities | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 13 | 15 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 |
| Percentage of Assets oke:MaturityofOperatingLeaseLiabilities | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 12 | 13 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 |
| Percentage of Assets oke:MaturityofOperatingLeaseLiabilities | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 11 | 12 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.1 |
| Percentage of Assets oke:MaturityofOperatingLeaseLiabilities | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 47 | 58 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | 100.0 | 100.0 |
| Percentage of Assets | 0.2 | 0.3 |
| Percentage of Assets oke:MaturityofOperatingLeaseLiabilities | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 16 | 16 | 17 |
| Percentage of OperatingLeaseLiability | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 |
| Percentage of Assets oke:CertainOperatingLeasesEnteredIntoDuringThePeriod | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 69 | 71 | 72 | 74 |
| Percentage of OperatingLeaseLiability | 0.0 | 440.7 | 438.6 | 431.4 |
| Percentage of Assets | 0.3 | 0.3 | 0.3 | 0.3 |
| Percentage of Assets oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 101 | 104 | 107 | 109 | 15 | 16 | 17 | 16 |
| Percentage of OperatingLeaseLiability | 0.0 | 645.1 | 646.4 | 639.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets | 0.4 | 0.5 | 0.5 | 0.5 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets oke:MaturityofOperatingLeaseLiabilities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 116 | 120 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 100.0 | 100.0 |
| Percentage of Assets | 0.5 | 0.5 |
| Percentage of Assets oke:MaturityofOperatingLeaseLiabilities | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 14 | 15 |
| Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 |
| Percentage of Assets oke:MaturityofOperatingLeaseLiabilities | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 5910 | 6096 | 6042 | 6146 | 6240 | 5560 | 6225 | 6218 | 6348 | 6442 | 6579 | 6652 | 6664 | 6701 | 5527 | 5359 | 5407 | 238 | 188 | 214 | 237 | 286 | 335 | 414 | 517 | 530 | 592 | 623 | 656 | 584 | 2337 | 2189 | 2085 | 2134 | 2129 | 2065 | 2089 | 2256 | 2238 | 2185 | 2217 | 2499 | 2448 | 2207 |
| Percentage of StockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 25.2 | 26.3 | 26.2 | 27.0 | 27.1 | 25.3 | 28.5 | 29.1 | 32.1 | 34.0 | 36.1 | 37.1 | 39.4 | 40.8 | 32.8 | 32.0 | 32.4 | 1.5 | 1.2 | 1.3 | 1.5 | 1.9 | 2.2 | 2.7 | 3.3 | 3.4 | 3.9 | 4.4 | 4.6 | 4.3 | 13.2 | 12.4 | 13.2 | 13.8 | 13.4 | 13.4 | 15.1 | 15.8 | 16.3 | 16.6 | 17.0 | 19.2 | 19.6 | 17.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | -601.443 | -465.596 | -551.449 | -530.618 | -524.903 | -499.386 | -374.0 | -421.104 | -336.396 | -269.524 | -188.239 | -158.138 | -178.589 |
| Percentage of StockholdersEquity | -10.2 | -7.6 | -9.1 | -8.6 | -8.4 | -9.0 | -6.0 | -6.8 | -5.3 | -4.2 | -2.9 | -2.4 | -2.7 |
| Percentage of Assets | -2.6 | -2.0 | -2.4 | -2.3 | -2.3 | -2.3 | -1.7 | -2.0 | -1.7 | -1.4 | -1.0 | -0.9 | -1.1 |
| Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 7247 | 7305 | 7353 | 7448 | 7549 | 6989 | 7403 | 7448 | 7495 | 7527 | 7615 | 7662 | 7699 |
| Percentage of StockholdersEquity | 122.6 | 119.8 | 121.7 | 121.2 | 121.0 | 125.7 | 118.9 | 119.8 | 118.1 | 116.9 | 115.7 | 115.2 | 115.5 |
| Percentage of Assets | 30.9 | 31.5 | 31.9 | 32.7 | 32.8 | 31.8 | 33.9 | 34.9 | 37.9 | 39.8 | 41.8 | 42.8 | 45.5 |
| Percentage of Assets us-gaap:AdditionalPaidInCapital | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 4.749 | 4.749 | 4.749 | 4.749 | 4.749 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 |
| Percentage of StockholdersEquity | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:CommonStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | -740.254 | -747.462 | -764.298 | -776.503 | -781.489 | -792.019 | -808.394 | -812.539 | -815.376 | -820.767 | -851.806 | -856.227 | -860.935 |
| Percentage of StockholdersEquity | -12.5 | -12.3 | -12.6 | -12.6 | -12.5 | -14.2 | -13.0 | -13.1 | -12.8 | -12.7 | -12.9 | -12.9 | -12.9 |
| Percentage of Assets | -3.2 | -3.2 | -3.3 | -3.4 | -3.4 | -3.6 | -3.7 | -3.8 | -4.1 | -4.3 | -4.7 | -4.8 | -5.1 |
| Percentage of Assets us-gaap:TreasuryStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 6042 | 6225 | 6218 | 6348 | 6442 | 6579 | 6652 | 6838 | 6869 | 5685 | 5516 | 5565 | 3469 | 3428 | 3440 | 3492 | 3645 | 3766 | 4037 | 3999 | 3893 | 4005 | 3759 | 3793 | 3127 | 4845 | 4690 | 4174 | 4204 | 4232 | 4175 | 4205 | 4379 | 3799 | 3682 | 3697 | 3957 | 3920 | 3895 | 3870 | 3879 | 3445 | 3167 | 2771 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 26.2 | 28.5 | 29.1 | 32.1 | 34.0 | 36.1 | 37.1 | 40.4 | 41.8 | 33.7 | 32.9 | 33.4 | 21.6 | 21.2 | 21.5 | 22.1 | 23.5 | 24.4 | 26.0 | 25.6 | 25.1 | 26.2 | 26.3 | 26.4 | 22.9 | 27.4 | 26.6 | 26.3 | 27.2 | 26.7 | 27.2 | 30.4 | 30.7 | 27.7 | 28.0 | 28.4 | 30.3 | 31.4 | 32.7 | 31.9 | 0.0 | 26.9 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | -551.449 | -374.0 | -421.104 | -336.396 | -269.524 | -188.239 | -158.138 | -178.589 | -174.692 | -188.53 | -181.771 | -176.085 | -139.062 | -154.35 | -154.351 | -159.246 | -134.614 | -127.242 | -136.112 | -135.334 | -139.892 | -136.353 | -107.656 | -113.127 | -109.913 | -121.987 | -219.492 | -211.97 | -223.153 | -216.798 | -240.476 | -205.64 | -178.845 | -206.121 | -174.573 | -131.266 | -135.137 | -108.802 | -118.613 | -70.616 | -7.069 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -9.1 | -6.0 | -6.8 | -5.3 | -4.2 | -2.9 | -2.4 | -2.6 | -2.5 | -3.3 | -3.3 | -3.2 | -4.0 | -4.5 | -4.5 | -4.6 | -3.7 | -3.4 | -3.4 | -3.4 | -3.6 | -3.4 | -2.9 | -3.0 | -3.5 | -2.5 | -4.7 | -5.1 | -5.3 | -5.1 | -5.8 | -4.9 | -4.1 | -5.4 | -4.7 | -3.5 | -3.4 | -2.8 | -3.4 | -2.2 | -0.3 |
| Percentage of Assets | -2.4 | -1.7 | -2.0 | -1.7 | -1.4 | -1.0 | -0.9 | -1.1 | -1.1 | -1.1 | -1.1 | -1.1 | -0.9 | -1.0 | -1.0 | -1.0 | -0.9 | -0.8 | -0.9 | -0.9 | -0.9 | -0.9 | -0.8 | -0.8 | -0.8 | -0.7 | -1.2 | -1.3 | -1.4 | -1.4 | -1.6 | -1.5 | -1.3 | -1.5 | -1.3 | -1.0 | -1.0 | -0.9 | -0.9 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 7353 | 7403 | 7615 | 7662 | 7699 | 7735 | 6588 | 6418 | 6463 | 1232 | 1234 | 1264 | 1294 | 1327 | 1378 | 1477 | 1564 | 1537 | 1541 | 1515 | 1503 | 1377 | 1433 | 1404 | 1278 | 1267 | 1324 | 1337 | 1326 | 1317 | 1418 | 1404 | 1396 | 1384 | 1392 | 1322 | 1301 | 1273 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 121.7 | 118.9 | 115.7 | 115.2 | 112.6 | 112.6 | 115.9 | 116.3 | 116.1 | 35.5 | 36.0 | 36.7 | 37.1 | 36.4 | 36.6 | 36.6 | 39.1 | 39.5 | 38.5 | 40.3 | 39.6 | 44.0 | 29.6 | 29.9 | 30.6 | 30.2 | 31.3 | 32.0 | 31.5 | 30.1 | 37.3 | 38.1 | 37.8 | 35.0 | 35.5 | 38.4 | 41.1 | 46.0 |
| Percentage of Assets | 31.9 | 33.9 | 41.8 | 42.8 | 45.5 | 47.1 | 39.1 | 38.3 | 38.8 | 7.7 | 7.6 | 7.9 | 8.2 | 8.6 | 8.9 | 9.5 | 10.0 | 9.9 | 10.1 | 10.6 | 10.5 | 10.1 | 8.1 | 8.0 | 8.1 | 8.2 | 8.4 | 8.7 | 9.6 | 9.2 | 10.4 | 10.7 | 10.7 | 10.6 | 11.1 | 10.3 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:AdditionalPaidInCapital | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 4.749 | 4.45 | 4.45 | 4.45 | 4.45 | 4.45 | 4.232 | 4.159 | 4.147 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 2.458 | 1.229 | 1.229 | 1.229 | 1.229 | 1.228 | 1.228 | 1.224 | 1.216 | 1.211 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:CommonStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | -764.298 | -808.394 | -812.539 | -815.376 | -820.767 | -851.806 | -856.227 | -860.935 | -863.485 | -876.713 | -880.931 | -883.445 | -887.97 | -893.677 | -897.852 | -900.366 | -908.507 | -917.862 | -929.505 | -937.051 | -942.55 | -953.701 | -956.977 | -961.911 | -965.31 | -997.035 | -1005.829 | -1007.834 | -1010.45 | -1039.773 | -1048.329 | -1050.942 | -903.585 | -935.323 | -947.839 | -949.632 | -652.573 | -663.274 | -683.467 | -696.616 | -710.126 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -12.6 | -13.0 | -13.1 | -12.8 | -12.7 | -12.9 | -12.9 | -12.6 | -12.6 | -15.4 | -16.0 | -15.9 | -25.6 | -26.1 | -26.1 | -25.8 | -24.9 | -24.4 | -23.0 | -23.4 | -24.2 | -23.8 | -25.5 | -25.4 | -30.9 | -20.6 | -21.4 | -24.1 | -24.0 | -24.6 | -25.1 | -25.0 | -20.6 | -24.6 | -25.7 | -25.7 | -16.5 | -16.9 | -19.8 | -22.0 | -25.6 |
| Percentage of Assets | -3.3 | -3.7 | -3.8 | -4.1 | -4.3 | -4.7 | -4.8 | -5.1 | -5.3 | -5.2 | -5.3 | -5.3 | -5.5 | -5.5 | -5.6 | -5.7 | -5.9 | -5.9 | -6.0 | -6.0 | -6.1 | -6.2 | -6.7 | -6.7 | -7.1 | -5.6 | -5.7 | -6.4 | -6.5 | -6.6 | -6.8 | -7.6 | -6.3 | -6.8 | -7.2 | -7.3 | -5.0 | -5.3 | -5.3 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:TreasuryStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 4749000.0 | 4749000.0 | 4749000.0 | 4749000.0 | 4749000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4450000.0 | 4232000.0 | 4159000.0 | 4147000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 2458000.0 | 1229000.0 | 1229000.0 | 1229000.0 | 1229000.0 | 1228000.0 | 1228000.0 | 1224000.0 |
| Percentage of CommonStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 7247 | 7305 | 7353 | 7448 | 7549 | 6989 | 7403 | 7448 | 7495 | 7527 | 7615 | 7662 | 7699 | 7735 | 6588 | 6418 | 6463 | 1232 | 1234 | 1264 | 1294 | 1327 | 1378 | 1477 | 1564 | 1537 | 1541 | 1515 | 1503 | 1377 | 1433 | 1404 | 1278 | 1267 | 1324 | 1337 | 1326 | 1317 | 1418 | 1404 | 1396 | 1384 | 1392 | 1322 |
| Percentage of AdditionalPaidInCapital | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 30.9 | 31.5 | 31.9 | 32.7 | 32.8 | 31.8 | 33.9 | 34.9 | 37.9 | 39.8 | 41.8 | 42.8 | 45.5 | 47.1 | 39.1 | 38.3 | 38.8 | 7.7 | 7.6 | 7.9 | 8.2 | 8.6 | 8.9 | 9.5 | 10.0 | 9.9 | 10.1 | 10.6 | 10.5 | 10.1 | 8.1 | 8.0 | 8.1 | 8.2 | 8.4 | 8.7 | 9.6 | 9.2 | 10.4 | 10.7 | 10.7 | 10.6 | 11.1 | 10.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | -601440000.0 | -465600000.0 | -551450000.0 | -530620000.0 | -524900000.0 | -499390000.0 | -374000000.0 | -421100000.0 | -336400000.0 | -269520000.0 | -188240000.0 | -158140000.0 | -178590000.0 | -174690000.0 | -188530000.0 | -181770000.0 | -176080000.0 | -139060000.0 | -154350000.0 | -154350000.0 | -159250000.0 | -134610000.0 | -127240000.0 | -136110000.0 | -135330000.0 | -139890000.0 | -136350000.0 | -107660000.0 | -113130000.0 | -109910000.0 | -121990000.0 | -219490000.0 | -211970000.0 | -223150000.0 | -216800000.0 | -240480000.0 | -205640000.0 | -178840000.0 | -206120000.0 | -174570000.0 | -131270000.0 | -135140000.0 | -108800000.0 | -118610000.0 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -2.6 | -2.0 | -2.4 | -2.3 | -2.3 | -2.3 | -1.7 | -2.0 | -1.7 | -1.4 | -1.0 | -0.9 | -1.1 | -1.1 | -1.1 | -1.1 | -1.1 | -0.9 | -1.0 | -1.0 | -1.0 | -0.9 | -0.8 | -0.9 | -0.9 | -0.9 | -0.9 | -0.8 | -0.8 | -0.8 | -0.7 | -1.2 | -1.3 | -1.4 | -1.4 | -1.6 | -1.5 | -1.3 | -1.5 | -1.3 | -1.0 | -1.0 | -0.9 | -0.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 740 | 747 | 764 | 776 | 781 | 792 | 808 | 812 | 815 | 820 | 851 | 856 | 860 | 863 | 876 | 880 | 883 | 887 | 893 | 897 | 900 | 908 | 917 | 929 | 937 | 942 | 953 | 956 | 961 | 965 | 997 | 1005 | 1007 | 1010 | 1039 | 1048 | 1050 | 903 | 935 | 947 | 652 | 663 | 683 |
| Percentage of TreasuryStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 3.2 | 3.2 | 3.3 | 3.4 | 3.4 | 3.6 | 3.7 | 3.8 | 4.1 | 4.3 | 4.7 | 4.8 | 5.1 | 5.3 | 5.2 | 5.3 | 5.3 | 5.5 | 5.5 | 5.6 | 5.7 | 5.9 | 5.9 | 6.0 | 6.0 | 6.1 | 6.2 | 6.7 | 6.7 | 7.1 | 5.6 | 5.7 | 6.4 | 6.5 | 6.6 | 6.8 | 7.6 | 6.3 | 6.8 | 7.2 | 5.0 | 5.3 | 5.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 544 | 533 | 795 | 366 | 313 | 422 | 619 | 358 | 614 | 353 | 670 | 513 | 507 | 495 | 379 | 293 | 373 | 269 | 429 | 390 | 302 | 229 | 311 | 361 | 294 | 39 | 415 | 334 | 45 | 490 | 273 | 233 | 316 | 471 | 228 | 110 | 226 | 426 | 330 | 154 | 227 | 647 | 74 | 168 | 32 | 558 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 16.1 | 16.7 | 31.0 | 16.9 | 18.9 | 19.8 | 23.3 | 15.9 | 25.0 | 12.7 | 21.4 | 15.1 | 17.1 | 16.0 | 10.0 | 10.1 | 13.7 | 9.8 | 16.2 | 16.6 | 14.2 | 12.9 | 16.2 | 19.0 | 13.8 | 2.2 | 14.6 | 10.7 | 1.5 | 15.5 | 6.6 | 6.5 | 9.5 | 13.3 | 6.2 | 3.6 | 9.0 | 12.5 | 8.1 | 4.3 | 6.5 | 16.8 | 2.3 | 5.7 | 1.2 | 14.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -153.874 | -170.691 | -288.658 | -426.985 | -590.094 | -964.792 | -1120.884 | -1015.813 | -767.232 | -864.829 | -630.068 | -883.419 | -345.749 | -255.652 | -173.036 | -210.866 | -74.268 | -109.463 | -130.857 | -186.109 | -128.532 | -169.947 | -248.538 | -286.409 | -321.997 | -333.775 | -1374.087 | -371.64 | -381.162 | -439.334 | -761.34 | -837.091 | -548.793 | -494.807 | -615.615 | -460.133 | -424.052 | -314.399 | -474.739 | -387.998 | -319.404 | -189.485 | -213.804 | 249 | -103.509 | -66.376 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -4.5 | -5.3 | -11.2 | -19.6 | -35.5 | -45.2 | -42.1 | -44.9 | -31.2 | -31.1 | -20.1 | -26.0 | -11.7 | -8.2 | -4.6 | -7.3 | -2.7 | -4.0 | -4.9 | -7.9 | -6.0 | -9.6 | -12.9 | -15.1 | -15.1 | -18.5 | -48.3 | -11.9 | -12.4 | -13.9 | -18.4 | -23.4 | -16.4 | -14.0 | -16.8 | -15.2 | -16.8 | -9.2 | -11.7 | -10.8 | -9.1 | -4.9 | -6.5 | 8.5 | -3.7 | -1.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -418.828 | -484.709 | -429.915 | -438.328 | 690 | 1052 | -151.401 | 1056 | 398 | 527 | -112.69 | 439 | -164.079 | -259.388 | -180.863 | -402.934 | -277.97 | -97.694 | -287.371 | -147.801 | -129.678 | -19.942 | -4.126 | -262.136 | 13 | 360 | 980 | -169.647 | 484 | 9.865 | -142.092 | 1349 | 121 | -416.362 | -7.676 | 1213 | -468.745 | 594 | 70 | -95.188 | -300.927 | 380 | 120 | -471.005 | 6.917 | -354.307 |
| Percentage of NetCashProvidedByUsedInFinancingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -12.4 | -15.2 | -16.7 | -20.2 | 41.6 | 49.3 | -5.7 | 46.7 | 16.2 | 19.0 | -3.6 | 12.9 | -5.5 | -8.4 | -4.8 | -13.9 | -10.2 | -3.6 | -10.8 | -6.3 | -6.1 | -1.1 | -0.2 | -13.8 | 0.7 | 20.0 | 34.5 | -5.4 | 15.8 | 0.3 | -3.4 | 37.8 | 3.6 | -11.8 | -0.2 | 40.1 | -18.5 | 17.4 | 1.7 | -2.6 | -8.6 | 9.8 | 3.7 | -16.0 | 0.2 | -9.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -122.083 | 77 | -498.603 | 414 | 510 | -652.351 | 399 | 245 | 15 | -72.489 | 69 | -2.179 | -19.719 | 25 | -320.695 | 21 | 61 | 11 | 56 | 43 | 39 | 59 | -187.388 | -13.447 | 66 | 21 | -207.055 | 148 | 60 | -630.211 | 745 | -110.266 | -439.671 | -395.207 | 863 | -666.272 | 706 | -73.595 | -329.166 | -392.513 | 839 | -19.449 | -52.768 | -64.182 | 138 |
| Percentage of CashAndCashEquivalentsPeriodIncreaseDecrease | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -3.8 | 3.0 | -22.9 | 24.9 | 23.9 | -24.5 | 17.7 | 10.0 | 0.6 | -2.3 | 2.0 | -0.1 | -0.6 | 0.7 | -11.0 | 0.8 | 2.3 | 0.4 | 2.4 | 2.1 | 2.2 | 3.1 | -9.9 | -0.6 | 3.7 | 0.7 | -6.6 | 4.9 | 1.9 | -15.2 | 20.9 | -3.3 | -12.4 | -10.8 | 28.5 | -26.3 | 20.7 | -1.8 | -9.2 | -11.2 | 21.7 | -0.6 | -1.8 | -2.3 | 3.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 107 | 119 | 93 | 106 | 42 | -55.949 | 103 | 96 | 97 | 75 | 96 | 102 | 86 | 74 | 258 | 95 | 55 | 92 | 56 | 52 | 47 | 52 | 23 | 19 |
| Percentage of DeferredIncomeTaxExpenseBenefit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 156 | 157 | 152 | 153 | 140 | 132 | 125 | 121 | 114 | 114 | 110 | 107 | 106 | 104 | 103 | 102 | 100 | 99 | 99 | 98 | 99 | 94 | 93 | 88 | 86 | 85 | 80 | 74 | 72 | 67 | 108 | 94 | 91 | 90 | 86 | 81 | 84 | 83 | 77 | 75 | 78 | 79 | 76 | 77 | 75 | 77 |
| Percentage of DepreciationDepletionAndAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 67 | 67 | 66 | 66 | 55 | 58 | 57 | 55 | 53 | 52 | 50 | 49 | 48 | 47 | 47 | 46 | 46 | 44 | 45 | 44 | 46 | 41 | 40 | 37 | 35 | 35 | 34 | 31 | 29 | 28 | 27 | 27 | 25 | 23 |
| Percentage of DepreciationDepletionAndAmortization | 42.9 | 42.7 | 43.5 | 43.4 | 39.5 | 44.4 | 45.6 | 45.9 | 46.6 | 46.1 | 46.1 | 45.8 | 45.3 | 45.8 | 45.4 | 45.8 | 45.6 | 45.2 | 45.6 | 45.7 | 46.8 | 44.3 | 43.9 | 42.2 | 41.3 | 41.6 | 42.5 | 42.0 | 40.8 | 42.8 | 25.5 | 29.0 | 27.3 | 26.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 74 | 74 | 73 | 71 | 69 | 57 | 52 | 50 | 46 | 46 | 45 | 43 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 34 | 31 | 31 | 27 | 24 | 22 | 22 | 19 |
| Percentage of DepreciationDepletionAndAmortization | 47.3 | 47.4 | 48.1 | 46.7 | 49.2 | 43.7 | 42.0 | 41.5 | 40.3 | 40.6 | 40.7 | 40.7 | 40.3 | 40.7 | 41.3 | 41.0 | 41.1 | 41.4 | 41.4 | 41.4 | 41.0 | 43.1 | 43.5 | 44.5 | 45.3 | 45.7 | 42.5 | 42.4 | 43.1 | 40.2 | 22.4 | 24.4 | 24.3 | 21.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 14 | 14 | 11 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 |
| Percentage of DepreciationDepletionAndAmortization | 9.2 | 9.2 | 7.7 | 9.3 | 10.6 | 11.2 | 11.6 | 11.8 | 12.3 | 12.4 | 12.5 | 12.7 | 13.6 | 12.7 | 12.6 | 12.5 | 12.5 | 12.6 | 12.2 | 12.2 | 11.5 | 11.8 | 11.8 | 12.4 | 12.4 | 12.5 | 13.3 | 14.6 | 15.1 | 16.0 | 10.0 | 11.5 | 11.8 | 12.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 155 | 156 | 151 | 152 | 139 | 131 | 125 | 120 | 114 | 113 | 109 | 106 | 105 | 103 | 103 | 101 | 100 | 98 | 98 | 97 | 98 | 93 |
| Percentage of DepreciationDepletionAndAmortization | 99.4 | 99.3 | 99.3 | 99.3 | 99.3 | 99.3 | 99.3 | 99.3 | 99.2 | 99.2 | 99.2 | 99.2 | 99.2 | 99.2 | 99.3 | 99.3 | 99.2 | 99.2 | 99.2 | 99.2 | 99.3 | 99.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | 1.013 | 1.07 | 1.01 | 1.009 | 1.007 | 0.987 | 0.915 | 0.9 | 0.899 | 0.92 | 0.867 | 0.847 | 0.835 | 0.793 | 0.764 | 0.762 | 0.791 | 0.793 | 0.786 | 0.748 | 0.74 | 0.742 | 0.746 | 0.782 | 0.788 | 0.108 | 1.402 | 0.687 | 0.68 | 0.679 | 0.669 | 0.669 | 0.656 | 0.605 | 0.592 | -0.36 | 1.496 | 0.504 |
| Percentage of DepreciationDepletionAndAmortization | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.8 | 0.7 | 0.8 | 0.8 | 0.9 | 0.9 | 0.1 | 1.7 | 0.9 | 0.9 | 1.0 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | -0.4 | 1.8 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 |
| Value | 112 | 251 | 118 | 42 | 109 | -350.701 | 99 | 105 | -205.588 | -62.469 | -278.295 | 240 | 78 | -361.008 | 179 | 216 | -11.491 | -122.843 | 149 | 34 | 168 | -64.088 | -13.601 | -55.423 | -10.221 | -125.898 | -306.807 | -107.76 | -31.243 | 27 | 82 | 146 | 39 | -103.69 | 125 | 247 | -227.332 | -176.674 | 103 |
| Percentage of IncreaseDecreaseInAccountsPayable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 85 | 141 | -72.767 | 98 | 70 | -173.885 | 21 | 98 | -58.273 | -53.444 | -129.626 | 140 | 100 | -149.825 | 28 | 114 | 6.794 | 53 | -77.735 | -28.177 | 89 | 27 | -14.224 | -7.829 | -68.554 | 84 | -204.211 | 3.229 | -23.722 | 63 | 247 | -229.217 | -132.523 | 214 | -127.705 | 82 | 262 | -251.227 | -92.82 | -107.785 | -166.502 | 301 | -5.849 | -160.491 | -175.687 | 177 |
| Percentage of IncreaseDecreaseInInventories | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -3.139 | -56.966 | 41 | 179 | 27 | -129.93 | -45.73 | -3.26 | -51.166 | 114 | -27.069 | -4.341 | -25.267 | 52 | -5.858 | 2.404 | -34.585 | 53 | -17.328 | -24.999 | -21.163 | 27 | 25 | 7.21 | -28.597 | 52 | -20.349 | 34 | -30.04 | -1.011 | -104.378 | 9.099 | 79 | -22.425 | -22.07 | 24 | 142 | 4.408 | 41 | 15 | -113.039 | 67 | 65 | -8.933 | -184.013 | 158 |
| Percentage of IncreaseDecreaseInOtherOperatingCapitalNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 544 | 533 | 795 | 366 | 313 | 422 | 619 | 358 | 614 | 353 | 670 | 513 | 507 | 495 | 379 | 293 | 373 | 269 | 429 | 390 | 302 | 229 | 311 | 361 | 294 | 39 | 415 | 334 | 45 | 490 | 273 | 233 | 316 | 471 | 228 | 110 | 226 | 426 | 330 | 154 | 227 | 647 | 74 | 168 | 32 | 558 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 16.1 | 16.7 | 31.0 | 16.9 | 18.9 | 19.8 | 23.3 | 15.9 | 25.0 | 12.7 | 21.4 | 15.1 | 17.1 | 16.0 | 10.0 | 10.1 | 13.7 | 9.8 | 16.2 | 16.6 | 14.2 | 12.9 | 16.2 | 19.0 | 13.8 | 2.2 | 14.6 | 10.7 | 1.5 | 15.5 | 6.6 | 6.5 | 9.5 | 13.3 | 6.2 | 3.6 | 9.0 | 12.5 | 8.1 | 4.3 | 6.5 | 16.8 | 2.3 | 5.7 | 1.2 | 14.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 342 | 386 | 308 | 312 | 134 | -141.857 | 320 | 309 | 311 | 337 | 292 | 313 | 282 | 266 | 64 | 166 | 175 | 186 | 194 | 194 | 179 | 174 | -28.216 | 160 | 150 | 95 | 201 | 114 | 140 | 206 | 184 | 147 | 79 | 165 | 195 | 164 | 149 | 233 | 264 | 160 | 134 | 199 | 147 | 120 | 86 | 186 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 10.1 | 12.1 | 12.0 | 14.4 | 8.1 | -6.6 | 12.0 | 13.7 | 12.7 | 12.1 | 9.3 | 9.2 | 9.5 | 8.6 | 1.7 | 5.7 | 6.5 | 6.8 | 7.3 | 8.2 | 8.4 | 9.9 | -1.5 | 8.5 | 7.1 | 5.3 | 7.1 | 3.7 | 4.6 | 6.5 | 4.4 | 4.1 | 2.4 | 4.7 | 5.4 | 5.4 | 5.9 | 6.8 | 6.5 | 4.5 | 3.8 | 5.2 | 4.5 | 4.1 | 3.1 | 4.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 |
| Value | 342 | 386 | 312 | 134 | -141.857 | 309 | 311 | 337 | 292 | 313 | 281 | 264 | 63 | 165 | 71 | 87 | 90 | 92 | 85 | 83 | 25 | 82 | 76 | 60 | 94 | 64 | 61 | 93 | 90 | 62 | 0.919 | 112 | 111 | 65 | 60 | 122 | 115 | 60 | 55 | 130 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 99.8 | 99.6 | 99.4 | 97.3 | 99.5 | 40.7 | 46.9 | 46.5 | 47.4 | 47.8 | 47.7 | -90.4 | 51.1 | 50.7 | 63.5 | 46.9 | 56.4 | 43.8 | 45.3 | 49.3 | 42.2 | 1.2 | 67.9 | 56.9 | 39.5 | 40.9 | 52.6 | 43.4 | 37.5 | 40.9 | 65.3 |
| Percentage of Revenues | 10.1 | 12.1 | 14.4 | 8.1 | -6.6 | 13.7 | 12.7 | 12.1 | 9.3 | 9.2 | 9.5 | 8.5 | 1.7 | 5.7 | 2.6 | 3.2 | 3.4 | 3.9 | 4.0 | 4.7 | 1.3 | 4.3 | 3.6 | 3.4 | 3.3 | 2.1 | 2.0 | 3.0 | 2.2 | 1.7 | 0.0 | 3.2 | 3.0 | 2.2 | 2.4 | 3.6 | 2.8 | 1.7 | 1.6 | 3.4 |
| Percentage of Revenues us-gaap:RetainedEarnings | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -153.874 | -170.691 | -288.658 | -426.985 | -590.094 | -964.792 | -1120.884 | -1015.813 | -767.232 | -864.829 | -630.068 | -883.419 | -345.749 | -255.652 | -173.036 | -210.866 | -74.268 | -109.463 | -130.857 | -186.109 | -128.532 | -169.947 | -248.538 | -286.409 | -321.997 | -333.775 | -1374.087 | -371.64 | -381.162 | -439.334 | -761.34 | -837.091 | -548.793 | -494.807 | -615.615 | -460.133 | -424.052 | -314.399 | -474.739 | -387.998 | -319.404 | -189.485 | -213.804 | 249 | -103.509 | -66.376 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -4.5 | -5.3 | -11.2 | -19.6 | -35.5 | -45.2 | -42.1 | -44.9 | -31.2 | -31.1 | -20.1 | -26.0 | -11.7 | -8.2 | -4.6 | -7.3 | -2.7 | -4.0 | -4.9 | -7.9 | -6.0 | -9.6 | -12.9 | -15.1 | -15.1 | -18.5 | -48.3 | -11.9 | -12.4 | -13.9 | -18.4 | -23.4 | -16.4 | -14.0 | -16.8 | -15.2 | -16.8 | -9.2 | -11.7 | -10.8 | -9.1 | -4.9 | -6.5 | 8.5 | -3.7 | -1.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 147 | 176 | 271 | 380 | 594 | 949 | 1109 | 1019 | 830 | 889 | 831 | 694 | 350 | 264 | 181 | 135 | 82 | 112 | 133 | 158 | 136 | 196 | 257 | 300 | 285 | 343 | 574 | 382 | 392 | 429 | 658 | 537 | 559 | 501 | 627 | 458 | 432 | 348 | 473 | 338 | 329 | 194 | 226 | 176 | 111 | 68 |
| Percentage of PaymentsToAcquirePropertyPlantAndEquipment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 56 | 39 | 83 | 63 | 118 | 181 | 252 | 245 | 213 | 215 | 261 | 213 | 108 | 111 | 98 | 85 | 37 | 63 | 84 | 99 | 84 | 141 | 195 | 231 | 205 | 255 | 392 | 214 | 168 | 122 | 199 | 204 | 206 | 163 |
| Percentage of PaymentsToAcquirePropertyPlantAndEquipment | 38.6 | 22.4 | 30.7 | 16.6 | 19.9 | 19.1 | 22.8 | 24.1 | 25.7 | 24.2 | 31.4 | 30.7 | 31.0 | 42.2 | 54.1 | 63.3 | 44.9 | 56.0 | 63.6 | 63.0 | 61.9 | 72.0 | 75.7 | 77.1 | 71.9 | 74.2 | 68.4 | 56.2 | 42.8 | 28.6 | 30.3 | 38.1 | 36.8 | 32.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 59 | 112 | 150 | 298 | 459 | 746 | 827 | 738 | 591 | 639 | 519 | 444 | 216 | 124 | 54 | 27 | 12 | 20 | 20 | 30 | 20 | 34 | 40 | 52 | 59 | 73 | 160 | 153 | 210 | 273 | 354 | 230 | 269 | 274 |
| Percentage of PaymentsToAcquirePropertyPlantAndEquipment | 40.7 | 63.4 | 55.6 | 78.6 | 77.4 | 78.6 | 74.6 | 72.4 | 71.3 | 71.9 | 62.5 | 64.1 | 61.8 | 47.2 | 29.9 | 20.0 | 15.0 | 18.1 | 15.3 | 19.3 | 15.2 | 17.4 | 15.8 | 17.6 | 20.7 | 21.4 | 27.9 | 40.2 | 53.7 | 63.6 | 53.7 | 42.9 | 48.2 | 54.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 27 | 21 | 31 | 12 | 10 | 16 | 21 | 27 | 21 | 28 | 47 | 31 | 20 | 19 | 24 | 18 | 26 | 25 | 24 | 24 | 29 | 17 | 18 | 14 | 15 | 9.592 | 17 | 10 | 8.71 | 6.627 | 12 | 11 | 6.007 | 5.342 |
| Percentage of PaymentsToAcquirePropertyPlantAndEquipment | 18.9 | 12.0 | 11.6 | 3.4 | 1.8 | 1.7 | 1.9 | 2.7 | 2.6 | 3.2 | 5.7 | 4.5 | 5.8 | 7.5 | 13.7 | 13.9 | 32.5 | 22.2 | 18.4 | 15.5 | 21.4 | 9.1 | 7.1 | 4.9 | 5.5 | 2.8 | 3.0 | 2.8 | 2.2 | 1.5 | 1.9 | 2.1 | 1.1 | 1.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 144 | 172 | 265 | 374 | 588 | 944 | 1101 | 1011 | 826 | 883 | 828 | 689 | 346 | 256 | 177 | 131 | 76 | 108 | 129 | 154 | 134 | 193 |
| Percentage of PaymentsToAcquirePropertyPlantAndEquipment | 98.1 | 97.8 | 97.9 | 98.6 | 99.1 | 99.4 | 99.3 | 99.3 | 99.5 | 99.3 | 99.5 | 99.3 | 98.7 | 97.0 | 97.7 | 97.2 | 92.4 | 96.3 | 97.3 | 97.7 | 98.5 | 98.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | 2.753 | 3.905 | 5.729 | 5.143 | 5.394 | 5.296 | 7.811 | 7.624 | 4.069 | 6.531 | 3.82 | 4.967 | 4.632 | 7.919 | 4.123 | 3.822 | 6.293 | 4.119 | 3.546 | 3.597 | 2.112 | 2.759 | 3.561 | 1.508 | 5.467 | 5.488 | 4.356 | 2.833 | 5.082 | 26 | 7.635 | 4.632 | 9.04 | 3.872 | 3.617 | 8.633 | 3.9 | 9.196 |
| Percentage of PaymentsToAcquirePropertyPlantAndEquipment | 1.9 | 2.2 | 2.1 | 1.4 | 0.9 | 0.6 | 0.7 | 0.7 | 0.5 | 0.7 | 0.5 | 0.7 | 1.3 | 3.0 | 2.3 | 2.8 | 7.6 | 3.7 | 2.7 | 2.3 | 1.5 | 1.4 | 1.4 | 0.5 | 1.9 | 1.6 | 0.8 | 0.7 | 1.3 | 6.3 | 1.2 | 0.9 | 1.6 | 0.8 | 0.6 | 1.9 | 0.9 | 2.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -418.828 | -484.709 | -429.915 | -438.328 | 690 | 1052 | -151.401 | 1056 | 398 | 527 | -112.69 | 439 | -164.079 | -259.388 | -180.863 | -402.934 | -277.97 | -97.694 | -287.371 | -147.801 | -129.678 | -19.942 | -4.126 | -262.136 | 13 | 360 | 980 | -169.647 | 484 | 9.865 | -142.092 | 1349 | 121 | -416.362 | -7.676 | 1213 | -468.745 | 594 | 70 | -95.188 | -300.927 | 380 | 120 | -471.005 | 6.917 | -354.307 |
| Percentage of NetCashProvidedByUsedInFinancingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -12.4 | -15.2 | -16.7 | -20.2 | 41.6 | 49.3 | -5.7 | 46.7 | 16.2 | 19.0 | -3.6 | 12.9 | -5.5 | -8.4 | -4.8 | -13.9 | -10.2 | -3.6 | -10.8 | -6.3 | -6.1 | -1.1 | -0.2 | -13.8 | 0.7 | 20.0 | 34.5 | -5.4 | 15.8 | 0.3 | -3.4 | 37.8 | 3.6 | -11.8 | -0.2 | 40.1 | -18.5 | 17.4 | 1.7 | -2.6 | -8.6 | 9.8 | 3.7 | -16.0 | 0.2 | -9.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 0.0 | 0.0 | 1496 | 1748 | 0.0 | 1992 | 750 | 1442 | 550 | 1245 | 0.0 | 0.0 | 0.429 | 1190 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1000 | 0.0 | 492 | 0.0 | 798 | 0.0 | -1199.994 | 0.0 | 1199 | 0.0 | 1247 | 0.0 | 0.0 | 0.0 | 1295 | 0.0 | 699 | 0.0 | 0.0 | 0.0 | 1295 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of ProceedsFromIssuanceOfLongTermDebt | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 12 | 56 | 23 | 27 | 1353 | 52 | 1.912 | 551 | 1.912 | 501 | 1.912 | 426 | 1.912 | 501 | 1.912 | 988 | 1.947 | 1.951 | 451 | 1.966 | 2.003 | 652 | 1.958 | 1.92 | 1.927 | 1.948 | 1.911 | 1.913 | 1.922 | 551 | 2.066 | 1.914 | 1.913 | 1.975 | 2.213 | 3.078 | 353 | 3.082 | 3.157 | 93 | 403 | 228 | 3.067 | 3.105 | 253 | 3.333 |
| Percentage of RepaymentsOfLongTermDebt | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 416 | 416 | 415 | 415 | 387 | 386 | 378 | 367 | 357 | 354 | 351 | 339 | 327 | 316 | 285 | 283 | 129 | 129 | 129 | 129 | 129 | 129 | 128 | 128 | 126 | 126 | 122 | 121 | 116 | 83 | 78 | 78 | 74 | 73 | 67 | 67 | 63 | 63 | 57 | 57 | 55 | 55 | 51 | 48 | 46 | 46 |
| Percentage of PaymentsOfDividends | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 669 | 536 | 219 | 1613 | 1418 | 1294 | 1897 | 1631 |
| Percentage of DeferredTaxLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 1854 | 1131 | 581 | 294 | 210 |
| Percentage of DeferredTaxAssetsNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 0.0 | 0.0 | 0.0 | -220.0 | 220 | 0.0 | 0.0 | 0.0 | -120.0 | -36.0 | 156 | -614.673 | -317.577 | -342.157 | -16.322 | 180 | 416 | 117 | 131 | -101.773 |
| Percentage of ProceedsFromRepaymentsOfShortTermDebt | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 229 | 204 | 218 | 183 | 88 | 159 | 188 | 175 | 186 | 152 | 174 | 159 | 166 | 130 | 144 | 141 | 128 | 103 | 126 | 109 | 110 | 100 | 78 | 60 |
| Percentage of AdjustedEBITDA | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 480 | 435 | 417 | 451 | 337 | 410 | 373 | 367 | 346 | 377 | 347 | 399 | 352 | 342 | 309 | 293 | 273 | 278 | 253 | 279 | 276 | 270 | 244 | 192 |
| Percentage of AdjustedEBITDA | 209.5 | 212.8 | 191.1 | 246.4 | 380.4 | 257.4 | 198.4 | 209.6 | 185.8 | 248.0 | 199.0 | 250.0 | 211.0 | 262.0 | 214.5 | 207.1 | 213.1 | 267.6 | 200.3 | 254.2 | 250.8 | 270.1 | 313.3 | 318.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 94 | 226 | 105 | 109 | 109 | 112 | 97 | 103 | 100 | 106 | 97 | 90 | 85 | 93 | 88 | 87 | 80 | 82 | 89 | 80 | 68 | 74 | 65 | 70 |
| Percentage of AdjustedEBITDA | 41.3 | 110.5 | 48.2 | 60.0 | 123.8 | 70.5 | 51.9 | 59.2 | 53.9 | 70.1 | 55.6 | 56.5 | 51.2 | 71.7 | 61.5 | 61.7 | 62.9 | 79.8 | 71.0 | 73.1 | 62.1 | 74.3 | 83.6 | 116.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 804 | 866 | 741 | 744 | 536 | 683 | 660 | 646 | 633 | 636 | 619 | 648 | 604 | 566 | 542 | 523 | 482 | 465 | 470 | 469 | 455 | 444 |
| Percentage of AdjustedEBITDA | 350.8 | 423.3 | 339.2 | 406.4 | 604.2 | 427.9 | 350.3 | 368.9 | 339.7 | 418.1 | 354.6 | 406.5 | 362.1 | 433.7 | 375.9 | 368.7 | 376.0 | 447.4 | 371.3 | 427.4 | 412.9 | 444.4 |
| Period End | 2020-09-30 |
| Value | 1000 |
| Percentage of AggregateAmountOfCommonSharesAvailableForIssuanceAndSaleUnderEquityDistributionAgreement | 100.0 |
| Period End | 2021-03-31 |
| Value | 3.74 |
| Percentage of CommonStockDividendsPerShareDeclaredAnnualized | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 20 | 12 | -3.9 |
| Percentage of ContractwithCustomerLiabilityNetAdditions | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 86 | 11 | -1.568 | -14.45 | -15.039 | -11.451 | -19.706 | -8.075 | -4.97 |
| Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-03-31 |
| Value | -130.518 | -14.868 | 2.167 | 53 | 44 | -35.03 | 38 | 15 | 18 | 12 | -20.63 | -10.189 | -11.611 | -15.319 |
| Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet | -151.0 | -125.1 | -138.2 | -367.7 | -299.2 | 305.9 | -194.0 | -188.8 | -379.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-03-31 |
| Value | -9.666 | -9.859 | -8.998 | -64.541 | -10.278 | -9.008 | -6.903 | -4.815 | -2.504 | -4.358 | -4.383 | -5.602 | -3.943 | -5.329 |
| Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet | -11.2 | -82.9 | 573.9 | 446.7 | 68.3 | 78.7 | 35.0 | 59.6 | 50.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-03-31 |
| Value | -53.748 | -12.84 | -8.399 | -25.853 | 19 | -11.287 | 11 | 10 | 16 | 8.476 | -25.013 | -15.791 | -15.554 | -20.648 |
| Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet | -62.2 | -108.0 | 535.7 | 178.9 | -130.9 | 98.6 | -59.0 | -129.2 | -328.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-03-31 |
| Value | -175.477 | -63.43 | -24.171 | -29.667 | -39.056 | 87 | -5.058 | 32 | 33 | -21.625 | 109 | -30.783 | -46.388 | 20 | 27 |
| Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-03-31 |
| Value | -49.269 | 106 | 28 | 9.213 | -21.372 | -225.041 | 72 | -128.041 | -107.398 | -67.912 | -130.763 | 26 | 20 | 23 | 1.529 |
| Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet | 28.1 | -167.6 | -118.3 | -31.1 | 54.7 | -258.1 | -1435.0 | -398.0 | -322.2 | 314.0 | -119.5 | -85.1 | -43.3 | 114.3 | 5.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-03-31 |
| Value | -224.746 | 42 | 4.413 | -20.454 | -60.428 | -137.846 | 67 | -95.872 | -74.064 | -89.537 | -21.3 | -4.58 | -26.323 | 44 | 28 |
| Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet | 128.1 | -67.6 | -18.3 | 68.9 | 154.7 | -158.1 | -1335.0 | -298.0 | -222.2 | 414.0 | -19.5 | 14.9 | 56.7 | 214.3 | 105.6 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 22 |
| Percentage of ImpairmentOfEquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity | 0.0 | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 |
| Value | 3.176 | 0.0 | 0.0 | 604 | 0.0 | 0.0 |
| Percentage of Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 |
| Value | 18 | -37.919 | -4.645 | 9.638 | -7.576 | 0.649 | -59.681 | 31 | 23 | -39.755 | 47 | 2.13 | -8.022 | 1.888 | -9.138 | 23 | 28 | 2.968 | -29.811 | 5.231 | 5.44 | 15 | -57.14 | -17.384 | -19.385 | 3.555 | -2.959 | 8.611 | -1.584 | -56.301 | 26 | -7.735 | 126 | -101.604 | 8.273 | -50.707 | 5.64 | -18.092 |
| Percentage of IncreaseDecreaseInCommodityExchangesAndImbalancesNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 |
| Value | 55 | 22 | 28 | 107 |
| Percentage of LongtermDebtRepurchasedFaceAmount | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 1300 | 750 |
| Percentage of NotionalAmountOfCashFlowHedgeInstrumentsSettled | 0.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | -3721000.0 | 7372000.0 | 2258000.0 |
| Percentage of OtherComprehensiveIncomeLossAmountAttributabletoEquityMethodInvestmentsbeforeReclassificationAdjustmentsNetofTax | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | -176.75 | 40 | -34.744 |
| Percentage of OtherComprehensiveIncomeLossBeforeReclassifications | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | -3.244 | 7.83 | 2.723 | 1.112 | -3.561 | -7.643 | 3.388 | -4.399 | -3.683 | -2.511 | -2.857 | 1.48 | 0.977 | 2.824 | 0.244 | -0.169 | -1.37 | 0.325 | 8.726 | -0.6 | -4.714 | -4.917 | 0.0 | 0.0 |
| Percentage of OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | -3244000.0 | 7830000.0 |
| Percentage of OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTaxAttributabletoParent | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 |
| Value | 970000.0 | -2339000.0 | -814000.0 | -332000.0 | 1064000.0 | 2283000.0 | -1012000.0 | 1314000.0 | 1100000.0 | 750000.0 | 854000.0 | -442000.0 | -292000.0 | -844000.0 | 433000.0 | -100000.0 | -246000.0 | 58000.0 | 1570000.0 | -108000.0 | -848000.0 | -884000.0 | 0 | 0 |
| Percentage of OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | -40.903 | -45.65 | -13.913 | -11.247 | 6.462 | 6.194 | 9.784 | 3.206 | -22.437 | -15.326 | -15.156 | -25.528 | -15.152 | -5.466 | -7.721 | -3.938 | -2.859 | 0.552 | 0.695 | 3.07 | 2.691 | 0.1 | -0.261 | -0.615 | -3.389 | 4.131 | 24 | 11 | 10 | 7.698 | 18 |
| Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | -477000.0 | -458000.0 | -465000.0 | -96000.0 | -46000.0 | 14000.0 | 58000.0 | -83000.0 | 40000.0 | -21000.0 | 36000.0 | -65000.0 | -52000.0 | -22000.0 | -25000.0 |
| Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforOtherComprehensiveIncomeAttributabletoEquityMethodInvestmentsNetofTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 |
| Value | 2.342 | -0.715 | -2.107 | -5.865 | -1.578 | -33.081 | -19.786 | -20.711 | -14.541 | -13.729 | -10.219 | -3.29 | 2.659 | -4.753 | -5.322 | 5.783 | 43 | 6.5 | -4.797 | -0.362 | 4.684 |
| Percentage of OtherCorporateCostsandNoncashItems | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 2.287 | 3.151 | 3.817 | 0.655 | 1.978 | -4.498 | 2.566 | 2.883 | 1.571 | 3.945 | 0.139 | 1.703 | 3.292 | 1.873 | 2.033 | 2.774 | 0.65 | 0.234 | -0.695 | 0.922 | 0.258 | 1.115 |
| Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 4.476 | 6.647 | 7.207 | 1.898 | 6.262 | -6.619 | 3.318 | 4.174 | 2.738 | 5.706 | 0.04 | 2.268 | 4.671 | 2.85 | 2.605 | 3.094 | -0.552 | -0.041 | -0.826 | -0.029 | -0.283 | -0.436 |
| Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther | 195.7 | 210.9 | 188.8 | 289.8 | 316.6 | 147.2 | 129.3 | 144.8 | 174.3 | 144.6 | 28.8 | 133.2 | 141.9 | 152.2 | 128.1 | 111.5 | -84.9 | -17.5 | 118.8 | -3.1 | -109.7 | -39.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 1.114 | 1.703 | 1.724 | 0.427 | 1.355 | -1.966 | 1.046 | -0.701 | 1.5 | 1.132 | 0.211 | 1.05 | 2.388 | 0.263 | 0.82 | 0.203 | -0.06 | 1.284 | -1.282 | 4.871 | -1.118 | 3.059 |
| Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther | 48.7 | 54.0 | 45.2 | 65.2 | 68.5 | 43.7 | 40.8 | -24.3 | 95.5 | 28.7 | 151.8 | 61.7 | 72.5 | 14.0 | 40.3 | 7.3 | -9.2 | 548.7 | 184.5 | 528.3 | -433.3 | 274.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 7.877 | 11 | 12 | 2.98 | 9.595 | -13.083 | 6.93 | 6.356 | 5.809 | 10 | 0.39 | 5.021 | 10 | 4.986 | 5.458 | 6.071 | 0.038 | 1.477 | -2.803 | 5.764 | -1.143 | 3.738 |
| Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther | 344.4 | 365.0 | 334.0 | 455.0 | 485.1 | 290.9 | 270.1 | 220.5 | 369.8 | 273.3 | 280.6 | 294.8 | 314.4 | 266.2 | 268.5 | 218.9 | 5.8 | 631.2 | 403.3 | 625.2 | -443.0 | 335.2 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 48 | 152 |
| Percentage of RealizedLossonSettledInterestRateSwapsRecordedinAOCI | 0.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2017-12-31 | 2017-09-30 | 2016-12-31 | 2016-09-30 |
| Value | 3.176 | 0.0 | 0.0 | 641 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 20 | 0.0 | 0.0 |
| Percentage of AssetImpairmentCharges | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 1.792 | 0.0 | 0.0 | 564 | 0.0 | 20 |
| Percentage of AssetImpairmentCharges | 56.4 | 0.0 | 0.0 | 87.9 | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 1.384 | 0.0 | 0.0 | 77 | 0.0 | 0.0 |
| Percentage of AssetImpairmentCharges | 43.6 | 0.0 | 0.0 | 12.1 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 3.176 | 0.0 | 0.0 | 641 | 0.0 | 20 |
| Percentage of AssetImpairmentCharges | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2018-09-30 |
| Value | 27 | 195 |
| Percentage of BusinessCombinationConsiderationTransferred1 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 27 |
| Percentage of BusinessCombinationConsiderationTransferred1 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 0.935 | 0.935 | 0.935 | 0.935 | 0.935 | 0.935 | 0.915 | 0.89 | 0.865 | 0.86 | 0.855 | 0.825 | 0.795 | 0.77 | 0.745 | 0.745 | 0.615 | 0.615 | 0.615 | 0.615 | 0.615 | 0.615 | 0.615 | 0.605 | 0.605 | 0.605 | 0.59 | 0.575 | 0.56 | 0.4 | 0.38 | 0.38 | 0.36 | 0.36 | 0.33 | 0.33 | 0.33 | 0.305 | 0.56 | 0.56 | 0.56 | 0.52 | 0.52 | 0.46 | 0.44 | 0.44 | 0.42 | 0.42 | 0.4 | 0.4 |
| Percentage of CommonStockDividendsPerShareCashPaid | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2015-12-31 | 2015-09-30 | 2015-06-30 |
| Value | 0.935 | 0.935 | 0.935 | 0.935 | 0.855 | 0.825 | 0.795 | 0.77 | 0.745 | 0.745 | 0.615 | 0.615 | 0.615 | 0.615 | 0.615 | 0.605 | 0.605 |
| Percentage of CommonStockDividendsPerShareDeclared | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 1.1 | 20 | 1.0 |
| Percentage of ContractWithCustomerLiabilityRevenueRecognized | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | -1.841 | -0.001 | -0.002 | -0.001 | -0.001 | -0.001 | -0.075 | -0.074 | -0.074 | -0.074 | -0.336 | -0.334 | -0.334 | -0.334 | -0.42 | -0.419 | -0.42 | -0.42 | -0.262 | -0.262 |
| Percentage of DefinedBenefitPlanAmortizationOfGainsLosses | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | -4.913 | -4.913 | -4.593 | -4.571 | -4.571 | -4.571 | -3.175 | -3.158 | -3.158 | -3.158 | -4.286 | -4.258 | -4.258 | -4.258 | -3.41 | -3.392 | -3.392 | -3.392 | -2.756 | -2.737 |
| Percentage of DefinedBenefitPlanAmortizationOfGainsLosses | 266.9 | 491300.0 | 229650.0 | 457100.0 | 457100.0 | 457100.0 | 4233.3 | 4267.6 | 4267.6 | 4267.6 | 1275.6 | 1274.9 | 1274.9 | 1274.9 | 811.9 | 809.5 | 807.6 | 807.6 | 1051.9 | 1044.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 | 2018-03-31 | 2017-03-31 |
| Value | 28000.0 | 28000.0 | 30000.0 | 28000.0 | 28000.0 | 28000.0 | 0 | 0 | 0 | 0 |
| Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2020-03-31 | 2019-03-31 | 2018-03-31 |
| Value | 11 | 12 | 14 | 12 |
| Percentage of DefinedBenefitPlanContributionsByEmployer | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | -0.042 | 0.722 | 0.728 | 0.722 | 0.722 | 0.722 | 0.575 | 0.57 | 0.57 | 0.57 | 0.674 | 0.672 | 0.672 | 0.672 | 0.565 | 0.564 | 0.564 | 0.564 | 0.531 | 0.531 |
| Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 6.269 | 6.269 | 6.268 | 6.232 | 6.232 | 6.232 | 5.924 | 5.892 | 5.892 | 5.892 | 6.01 | 5.969 | 5.969 | 5.969 | 5.368 | 5.336 | 5.336 | 5.336 | 5.117 | 5.077 |
| Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets | -14926.2 | 868.3 | 861.0 | 863.2 | 863.2 | 863.2 | 1030.3 | 1033.7 | 1033.7 | 1033.7 | 891.7 | 888.2 | 888.2 | 888.2 | 950.1 | 946.1 | 946.1 | 946.1 | 963.7 | 956.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 0.284 | 0.442 | 0.445 | 0.442 | 0.442 | 0.442 | 0.511 | 0.509 | 0.509 | 0.509 | 0.527 | 0.527 | 0.527 | 0.527 | 0.566 | 0.565 | 0.565 | 0.565 | 0.601 | 0.601 |
| Percentage of DefinedBenefitPlanInterestCost | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 4.22 | 4.22 | 4.596 | 4.574 | 4.574 | 4.574 | 5.15 | 5.126 | 5.126 | 5.126 | 4.435 | 4.408 | 4.408 | 4.408 | 4.68 | 4.655 | 4.655 | 4.655 | 4.98 | 4.946 |
| Percentage of DefinedBenefitPlanInterestCost | 1485.9 | 954.8 | 1032.8 | 1034.8 | 1034.8 | 1034.8 | 1007.8 | 1007.1 | 1007.1 | 1007.1 | 841.6 | 836.4 | 836.4 | 836.4 | 826.9 | 823.9 | 823.9 | 823.9 | 828.6 | 823.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 2.262 | -0.164 | -0.166 | -0.164 | -0.164 | -0.164 | 0.072 | 0.073 | 0.073 | 0.073 | -0.016 | -0.015 | -0.015 | -0.015 | 0.171 | 0.17 | 0.171 | 0.171 | 0.065 | 0.065 |
| Percentage of DefinedBenefitPlanNetPeriodicBenefitCost | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 4.968 | 4.968 | 4.997 | 4.977 | 4.977 | 4.977 | 4.364 | 4.346 | 4.346 | 4.346 | 4.554 | 4.529 | 4.529 | 4.529 | 4.453 | 4.432 | 4.433 | 4.433 | 4.254 | 4.228 |
| Percentage of DefinedBenefitPlanNetPeriodicBenefitCost | 219.6 | -3029.3 | -3010.2 | -3034.8 | -3034.8 | -3034.8 | 6061.1 | 5953.4 | 5953.4 | 5953.4 | -28462.5 | -30193.3 | -30193.3 | -30193.3 | 2604.1 | 2607.1 | 2592.4 | 2592.4 | 6544.6 | 6504.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 0.095 | 0.115 | 0.115 | 0.115 | 0.115 | 0.115 | 0.117 | 0.117 | 0.117 | 0.117 | 0.212 | 0.211 | 0.211 | 0.211 | 0.167 | 0.165 | 0.165 | 0.165 | 0.149 | 0.149 |
| Percentage of DefinedBenefitPlanServiceCost | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 2.076 | 2.076 | 2.046 | 2.036 | 2.036 | 2.036 | 1.963 | 1.954 | 1.954 | 1.954 | 1.843 | 1.832 | 1.832 | 1.832 | 1.731 | 1.721 | 1.722 | 1.722 | 1.635 | 1.622 |
| Percentage of DefinedBenefitPlanServiceCost | 2185.3 | 1805.2 | 1779.1 | 1770.4 | 1770.4 | 1770.4 | 1677.8 | 1670.1 | 1670.1 | 1670.1 | 869.3 | 868.2 | 868.2 | 868.2 | 1036.5 | 1043.0 | 1043.6 | 1043.6 | 1097.3 | 1088.6 |
| Period End | 2021-03-31 |
| Value | -80.9 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 100.0 |
| Period End | 2020-09-30 |
| Value | -4.1 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 |
| Period End | 2020-09-30 |
| Value | -0.3 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 84.2 | 4.5 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 | 0.0 |
| Period End | 2020-09-30 |
| Value | 0.3 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 |
| Period End | 2021-03-31 |
| Value | -10.9 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 13.5 |
| Period End | 2021-03-31 |
| Value | -80.9 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 100.0 |
| Period End | 2020-09-30 |
| Value | 1.5 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | -0.2 | 0.5 | 0.6 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 | -0.6 | 0.0 |
| Period End | 2020-09-30 |
| Value | -4.1 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 |
| Period End | 2020-09-30 |
| Value | -0.3 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 27.3 | -0.2 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 0.8 | -0.5 | -0.6 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 | 0.6 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 84.2 | 4.5 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 | 0.0 |
| Period End | 2020-09-30 |
| Value | 0.3 |
| Percentage of DerivativeNonmonetaryNotionalAmountVolume | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 254 | 251 | 249 | 204 | 224 | 207 | 259 | 245 | 237 | 240 | 236 | 230 | 230 | 210 | 216 | 207 | 217 | 191 | 204 | 184 | 191 | 177 | 184 | 164 | 165 | 179 | 181 | 172 | 172 | 149 | 260 | 236 | 233 | 259 | 224 | 229 | 231 | 224 | 249 | 209 | 225 | 221 | 220 | 203 | 203 |
| Percentage of DirectOperatingCosts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 86 | 84 | 94 | 69 | 78 | 84 | 97 | 91 | 85 | 94 | 96 | 90 | 93 | 88 | 84 | 80 | 73 | 71 | 77 | 69 | 69 | 69 | 78 | 61 | 63 | 69 | 69 | 64 | 59 | 64 | 51 | 45 | 44 | 51 |
| Percentage of DirectOperatingCosts | 34.0 | 33.6 | 37.8 | 33.8 | 35.0 | 40.8 | 37.5 | 37.2 | 36.1 | 39.1 | 40.6 | 39.5 | 40.7 | 42.0 | 39.0 | 38.7 | 33.6 | 37.4 | 37.8 | 37.7 | 36.1 | 39.3 | 42.5 | 37.3 | 38.4 | 38.7 | 38.2 | 37.3 | 34.5 | 43.5 | 19.8 | 19.0 | 19.3 | 19.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 128 | 124 | 115 | 101 | 106 | 89 | 116 | 114 | 114 | 110 | 104 | 101 | 99 | 88 | 103 | 90 | 87 | 78 | 90 | 79 | 83 | 73 | 80 | 74 | 77 | 82 | 78 | 76 | 76 | 65 | 65 | 57 | 54 | 59 |
| Percentage of DirectOperatingCosts | 50.7 | 49.4 | 46.1 | 49.4 | 47.7 | 43.3 | 45.0 | 46.9 | 48.3 | 45.9 | 44.3 | 43.9 | 43.3 | 42.1 | 47.7 | 43.6 | 40.1 | 41.0 | 44.5 | 43.3 | 43.7 | 41.3 | 43.5 | 45.4 | 46.8 | 45.9 | 43.2 | 44.6 | 44.2 | 43.7 | 25.2 | 24.1 | 23.2 | 23.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 38 | 42 | 40 | 34 | 33 | 33 | 44 | 40 | 36 | 36 | 39 | 36 | 34 | 33 | 33 | 29 | 30 | 31 | 30 | 28 | 29 | 27 | 26 | 26 | 25 | 27 | 28 | 27 | 27 | 27 | 25 | 23 | 24 | 27 |
| Percentage of DirectOperatingCosts | 15.1 | 16.8 | 16.3 | 16.9 | 14.7 | 16.1 | 17.0 | 16.4 | 15.4 | 15.1 | 16.7 | 15.9 | 15.2 | 15.8 | 15.6 | 14.4 | 14.2 | 16.5 | 15.0 | 15.4 | 15.2 | 15.5 | 14.4 | 16.2 | 15.3 | 15.2 | 15.6 | 16.2 | 15.9 | 18.4 | 9.8 | 9.9 | 10.7 | 10.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 253 | 251 | 250 | 205 | 218 | 207 | 257 | 246 | 237 | 240 | 240 | 228 | 228 | 210 | 221 | 200 | 191 | 182 | 198 | 177 | 182 | 170 |
| Percentage of DirectOperatingCosts | 99.8 | 99.9 | 100.2 | 100.1 | 97.4 | 100.1 | 99.5 | 100.5 | 99.8 | 100.1 | 101.7 | 99.2 | 99.1 | 100.0 | 102.3 | 96.7 | 87.8 | 95.0 | 97.3 | 96.4 | 95.0 | 96.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | 0.49 | 0.313 | -0.554 | -0.212 | 5.727 | -0.308 | 1.354 | -1.165 | 0.413 | -0.212 | -4.022 | 1.732 | 1.982 | 0.063 | -4.912 | 6.781 | 26 | 9.637 | 5.505 | 6.564 | 9.577 | 6.714 | -0.659 | 1.877 | -0.85 | 0.321 | 5.527 | 3.272 | 9.268 | -8.277 | 7.023 | 2.827 | 1.111 | -0.02 | -0.178 | 0.232 | -0.501 | -1.637 |
| Percentage of DirectOperatingCosts | 0.2 | 0.1 | -0.2 | -0.1 | 2.6 | -0.1 | 0.5 | -0.5 | 0.2 | -0.1 | -1.7 | 0.8 | 0.9 | 0.0 | -2.3 | 3.3 | 12.2 | 5.0 | 2.7 | 3.6 | 5.0 | 3.8 | -0.4 | 1.1 | -0.5 | 0.2 | 3.0 | 1.9 | 5.4 | -5.6 | 2.7 | 1.2 | 0.5 | -0.0 | -0.1 | 0.1 | -0.2 | -0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 416 | 416 | 415 | 387 | 386 | 367 | 357 | 354 | 351 | 339 | 327 | 316 | 286 | 283 |
| Percentage of DividendsCommonStock | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 74 | 30 | 110 | 387 | 386 | 58 | 45 | 17 | 59 | 26 | 46 | 11 | 222 | 117 |
| Percentage of DividendsCommonStock | 17.9 | 7.3 | 26.7 | 100.0 | 100.0 | 16.0 | 12.8 | 4.9 | 16.8 | 7.9 | 14.3 | 3.8 | 77.8 | 41.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 341 | 385 | 304 | 0.0 | 0.0 | 308 | 311 | 336 | 292 | 312 | 280 | 304 | 63 | 165 |
| Percentage of DividendsCommonStock | 82.1 | 92.7 | 73.3 | 0.0 | 0.0 | 84.0 | 87.2 | 95.1 | 83.2 | 92.1 | 85.7 | 96.2 | 22.0 | 58.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 274000.0 | 710000.0 |
| Percentage of DividendsPreferredStock | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 275000.0 | 275000.0 | 275000.0 | 0 | 0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 275000.0 | 550000.0 | 0 | 0 | 0 |
| Percentage of DividendsPreferredStock | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 200.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 275000.0 | 352000.0 |
| Percentage of DividendsPreferredStock | 0.0 | 109.1 | 109.1 | 0.0 | 109.1 | 109.1 | 109.1 | 0.0 | 109.1 | 109.1 | 109.1 | 109.1 | 109.1 | 109.1 | 109.1 | 100.4 | 49.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 300000.0 | 100000.0 | 400000.0 |
| Percentage of DividendsPreferredStockCash | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 7.825 | 16 | 7.279 | 1.606 | 0.957 | -1.302 | 6.287 | 9.757 | 5.115 | 5.54 | 10 | 5.829 | 12 | 9.226 | 3.631 | 4.883 | 3.26 | 1.647 | 11 | 3.165 |
| Percentage of EmployeeBenefitsAndShareBasedCompensationNoncash | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-03-31 |
| Value | 27 | 30 | 34 | 37 | 30 | 41 | 42 | 39 | 35 | 45 | 44 | 41 | 43 | 41 | 42 | 42 | 42 | 39 | 38 | 34 | 25 | 46 | 63 | 30 | 32 | 29 | 33 | 23 | 30 | 30 | 27 | 27 | 28 | 23 | 27 | 23 | 32 | 36 | 45 | 31 | 27 | 27 | 27 | 21 |
| Percentage of EquityMethodInvestmentDividendsOrDistributions | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2017-12-31 | 2017-09-30 | 2016-12-31 | 2016-09-30 | 2014-12-31 | 2013-12-31 |
| Value | 0.0 | 0.0 | 0.0 | 37 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 4.27 | 0.0 | 0.0 | 129 | 0.0 |
| Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 30 |
| Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment | 0.0 | 0.0 | 80.8 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 7.2 |
| Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment | 0.0 | 0.0 | 19.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | -77.425 | -30.599 | 7.64 | -2.7 | -20.747 | 21 | 12 | 8.941 | 7.745 | -5.191 | 5.332 | -7.554 | -26.584 |
| Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 17 | 24 | -2.189 | -6.194 | -34.478 | -16.146 | -2.3 | -12.38 | -8.83 | -25.361 |
| Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | -20.262 | -4.612 | -31.428 | -2.033 | 3.407 | 20 | 13 | 2.728 | 4.545 | 1.597 |
| Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 506000.0 | 493000.0 | 481000.0 | 469000.0 | 457000.0 | 447000.0 | 435000.0 | 425000.0 |
| Percentage of FinanceLeasePrincipalPayments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 0.707 | 0.269 | 0.767 | 0.017 | 0.339 | 0.204 | 0.307 | 0.016 | -2.958 | 0.06 | 0.253 | 0.163 | 0.096 | 0.089 | 0.02 | 0.274 | 0.637 | -0.007 | 0.098 | 5.744 | -0.413 | 4.206 | 6.239 | -0.726 | 0.122 | -0.006 | 5.066 | 1.534 | -0.016 | 0.015 | 11 | 0.022 | 0.279 | 0.041 | -7.339 | -0.42 | 0.966 | -0.057 | 0.172 | -0.069 | 0.212 | 0.51 | -3.551 | -16.126 | 0.272 | 0.786 |
| Percentage of GainLossOnSaleOfPropertyPlantEquipment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 153 |
| Percentage of GoodwillImpairmentLoss | 0.0 | 0.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 380 |
| Percentage of ImpairmentOfLongLivedAssetsHeldForUse | 0.0 | 0.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 70 |
| Percentage of ImpairmentOfLongLivedAssetsHeldForUse | 0.0 | 0.0 | 18.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 25 | 33 | 35 | 38 | 25 | 44 | 39 | 37 | 34 | 43 | 42 | 39 | 36 | 40 | 40 | 40 | 39 | 39 | 39 | 35 | 32 | 32 | 32 | 32 | 30 | 30 | 34 | -52.347 | 25 | 33 | 30 | 27 | 26 | 25 | 30 | 28 | 29 | 34 | 33 | 32 | 29 | 32 | 30 | 29 | 20 | 21 |
| Percentage of IncomeLossFromEquityMethodInvestments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 12 | 20 | 18 | 22 | 12 | 22 | 18 | 16 | 13 | 20 | 18 | 16 | 15 | 17 | 17 | 16 | 15 | 18 | 17 | 17 | 15 | 18 | 15 | 16 | 15 | 19 | 16 | 14 | 15 | 23 | 16 | 16 | 15 | 16 | 18 | 18 | 16 | 20 | 19 | 19 | 16 | 20 | 19 | 21 | 12 |
| Percentage of IncomeLossFromEquityMethodInvestments | 48.9 | 60.7 | 52.2 | 57.9 | 50.8 | 49.6 | 46.4 | 42.9 | 40.1 | 47.8 | 44.9 | 41.9 | 41.7 | 42.6 | 42.9 | 41.0 | 39.7 | 47.6 | 45.2 | 50.8 | 48.6 | 56.7 | 49.3 | 50.1 | 50.8 | 63.7 | 47.2 | -27.5 | 62.4 | 69.5 | 55.0 | 59.9 | 57.8 | 63.4 | 59.4 | 63.6 | 55.1 | 58.4 | 57.8 | 61.6 | 55.5 | 65.0 | 64.2 | 72.1 | 59.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 0.793 | 2.36 | 0.589 | -0.031 | -2.324 | 1.963 | -1.273 | -1.428 | -1.113 | -1.053 | -0.041 | 0.443 | -0.458 | 1.705 | -11.955 | 7.825 | 8.857 | 7.181 | 8.324 | 3.415 | 3.041 | 0.936 | 5.55 | 5.55 | 5.144 | 4.332 | 1.731 | 2.15 | 2.03 | 1.79 | 1.623 | 1.716 | 1.908 | 1.985 | 1.749 | 0.668 | 3.122 | 3.699 | 2.302 | 3.135 | 2.233 | 2.406 | 1.187 | 1.899 | 2.912 |
| Percentage of IncomeLossFromEquityMethodInvestments | 3.1 | 7.1 | 1.7 | -0.1 | -9.2 | 4.4 | -3.2 | -3.8 | -3.3 | -2.4 | -0.1 | 1.1 | -1.3 | 4.2 | -29.7 | 19.5 | 22.5 | 18.2 | 21.2 | 9.7 | 9.4 | 2.8 | 17.3 | 17.2 | 17.1 | 14.0 | 5.1 | -4.1 | 8.0 | 5.3 | 5.3 | 6.2 | 7.2 | 7.7 | 5.7 | 2.3 | 10.7 | 10.7 | 6.9 | 9.8 | 7.6 | 7.5 | 3.9 | 6.5 | 14.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 4.739 | 2.972 | 8.528 | 8.007 | 7.972 | 14 | 15 | 15 | 15 | 17 | 17 | 16 | 16 | 16 | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 13 | 10 | 10 | 9.623 | 6.887 | 13 | 3.856 | 4.121 | 4.731 | 6.251 | 5.783 | 5.528 | 2.899 | 4.257 | 4.49 | 5.979 | 5.317 | 5.461 | 4.338 | 5.36 | 4.376 | 4.41 | 1.011 | 0.0 |
| Percentage of IncomeLossFromEquityMethodInvestments | 18.4 | 8.9 | 24.2 | 21.0 | 31.5 | 31.6 | 39.0 | 41.2 | 45.3 | 40.0 | 40.6 | 40.9 | 44.4 | 40.8 | 39.3 | 39.4 | 37.8 | 34.3 | 33.6 | 39.5 | 42.0 | 40.4 | 33.4 | 32.7 | 32.0 | 22.3 | 38.5 | -7.4 | 16.2 | 14.1 | 20.3 | 21.1 | 20.9 | 11.2 | 13.9 | 15.7 | 20.5 | 15.4 | 16.3 | 13.5 | 18.1 | 13.6 | 14.4 | 3.4 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 7.602 | 7.749 | 7.742 | 8.033 | 6.809 | 6.433 | 7.003 | 7.421 | 6.077 | 6.338 | 6.19 | 6.303 | 5.542 | 4.958 | 4.958 | 4.898 | 4.889 | 4.405 |
| Percentage of IncomeLossFromEquityMethodInvestments | 29.6 | 23.3 | 22.0 | 21.1 | 26.9 | 14.4 | 17.8 | 19.7 | 17.8 | 14.6 | 14.6 | 16.0 | 15.2 | 12.3 | 12.3 | 12.2 | 12.4 | 11.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 0.442 | 1.728 | 0.262 | -0.042 | -2.149 | 0.806 | -1.632 | -1.837 | -1.621 | -1.202 | -0.538 | 0.074 | -0.794 | 1.668 | 2.255 | 3.433 | 3.78 | 2.63 | 2.755 | 2.596 | 2.576 | 2.815 | 4.352 | 4.35 | 4.922 | 4.239 | 4.343 | -71.069 | 5.099 | 5.486 | 7.265 | 4.668 | 5.229 | 6.331 |
| Percentage of IncomeLossFromEquityMethodInvestments | 1.7 | 5.2 | 0.7 | -0.1 | -8.5 | 1.8 | -4.1 | -4.9 | -4.8 | -2.8 | -1.3 | 0.2 | -2.2 | 4.2 | 5.6 | 8.6 | 9.6 | 6.6 | 7.0 | 7.4 | 8.0 | 8.6 | 13.6 | 13.5 | 16.4 | 13.7 | 12.7 | 135.8 | 20.0 | 16.3 | 23.6 | 17.0 | 19.8 | 24.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 5.09 | 3.604 | 8.855 | 8.018 | 7.797 | 15 | 15 | 15 | 15 | 17 | 17 | 16 | 16 | 16 | 15 | 15 | 15 | 13 | 13 | 13 | 13 | 13 | 11 | 10 | 9.693 | 6.98 | 13 | 4.351 | 4.459 | 4.764 | 6.595 | 6.336 | 5.912 | 3.135 |
| Percentage of IncomeLossFromEquityMethodInvestments | 19.8 | 10.8 | 25.1 | 21.1 | 30.8 | 34.2 | 39.9 | 42.3 | 46.8 | 40.3 | 41.8 | 41.8 | 45.3 | 40.9 | 39.2 | 38.2 | 38.3 | 34.7 | 33.9 | 39.7 | 43.0 | 40.6 | 34.6 | 33.8 | 32.3 | 22.6 | 40.1 | -8.3 | 17.5 | 14.2 | 21.4 | 23.1 | 22.4 | 12.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 20 | 27 | 26 | 30 | 19 | 28 | 25 | 23 | 19 | 27 | 25 | 22 | 20 | 22 | 22 | 21 | 20 | 23 | 23 | 18 | 15 | 16 | 16 | 16 | 15 | 19 | 16 | 14 | 15 | 23 | 16 | 16 | 15 | 16 |
| Percentage of IncomeLossFromEquityMethodInvestments | 78.5 | 84.0 | 74.1 | 79.0 | 77.7 | 64.0 | 64.2 | 62.6 | 57.9 | 62.4 | 59.5 | 58.0 | 56.8 | 55.0 | 55.2 | 53.3 | 52.1 | 58.7 | 59.1 | 52.9 | 49.1 | 50.9 | 51.8 | 52.7 | 51.3 | 63.7 | 47.2 | -27.5 | 62.4 | 69.5 | 55.0 | 59.9 | 57.8 | 63.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 25 | 33 | 35 | 38 | 25 | 44 | 39 | 37 | 34 | 43 | 42 | 39 | 36 | 40 | 40 | 40 | 39 | 39 | 39 | 35 | 32 | 32 |
| Percentage of IncomeLossFromEquityMethodInvestments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 |
| Value | -139.625 | -19.302 | -324.001 | -3.181 | 60 | 78 | -6.976 | 99 | -2.041 | -4.362 | -50.751 | 5.614 | -38.193 | -34.387 | -3.083 | 32 | -20.963 | -45.977 | 29 | -11.321 | 36 | 23 | -12.87 | -20.908 | 5.277 | 60 | -31.615 | -8.883 | -8.275 | -10.766 |
| Percentage of IncreaseDecreaseInDerivativeAssetsAndLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | -104.872 | 104 | -76.87 | 95 | -68.918 | 68 | -44.797 | 53 | -47.81 | 49 | -37.784 | 38 | -14.674 | 21 | -22.363 | 8.377 | -15.637 | 15 | -24.413 | 20 | -6.629 | 11 | -1.118 | 2.039 | -2.261 | 2.268 | -6.397 | -1.485 | 19 | -16.131 | 14 |
| Percentage of IncreaseDecreaseInInterestPayableNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 183 | 85 | 112 | 108 | 113 | -334.37 | 119 | 49 | -143.58 | -6.089 | -266.117 | 150 | 90 | -358.733 | 297 | 156 | 14 | -137.586 | 140 | 59 | 153 | -68.326 | 0.691 | -98.622 | 75 | -134.3 | -224.958 | -139.051 | -130.284 | 112 | -372.186 | -8.256 | 99 | 90 | 365 | 190 | -360.64 | -180.413 | -138.77 | -14.481 | 155 | 53 | -474.672 | 35 | 295 | 235 |
| Percentage of IncreaseDecreaseInReceivables | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 |
| Value | 5.443 | 5.095 | 13 | 13 | 16 | 30 | 33 | 27 | 26 | 19 | 12 | 8.326 | 5.134 | 2.038 | 1.256 | 1.068 | 1.745 | 1.441 | 1.326 | 3.806 | 2.572 | 2.887 | 10 | 8.851 | 9.927 | 7.23 | 13 | 14 | 11 | 15 | 18 | 14 | 11 | 12 | 12 | 11 | 9.7 | 8.977 | 11 | 5.967 | 4.2 |
| Percentage of InterestCostsCapitalized | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 341 | 385 | 307 | 312 | 134 | -142.132 | 319 | 308 | 311 | 336 | 292 | 312 | 280 | 264 | 62 | 165 | 71 | 87 | 90 | 92 | 86 | 84 | 27 | 86 | 76 | 60 | 93 | 64 | 69 | 91 | 90 | 62 | 0.919 | 112 | 111 | 65 | 60 | 108 | 112 | 60 | 55 | 129 | 81 | 55 | 41 |
| Percentage of NetIncomeLossAttributableToParentDiluted | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 3.583 | 3.512 | 3.31 | 2.84 | 1.241 | 1.672 | 1.781 | 1.519 |
| Percentage of OperatingLeasePayments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | -173.054 | 32 | 3.398 | -15.75 | -46.53 | -106.141 | 51 | -73.822 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | -51692000.0 | 9857000.0 | 1015000.0 | -4704000.0 | -13898000.0 | -31705000.0 | 15530000.0 | -22050000.0 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | -35.204 | -41.387 | -9.887 | -5.361 | -21.013 | 15 | -8.691 | 8.952 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2020-06-30 |
| Value | 49 | -14.45 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2020-06-30 |
| Value | -85.162 | 53 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax | -172.5 | -367.7 |
| Period End | 2021-06-30 | 2020-06-30 |
| Value | -9.915 | -64.541 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax | -20.1 | 446.7 |
| Period End | 2021-06-30 | 2020-06-30 |
| Value | -45.72 | -25.853 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax | -92.6 | 178.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | -10516000.0 | -12361000.0 | -2953000.0 | -3038000.0 | -4840000.0 | 4518000.0 | -2596000.0 | 2673000.0 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | -137.85 | 74 | 13 |
| Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | -135.847 | 85 |
| Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | -0.025 | 0.167 | 40 |
| Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | -5.247 | -3.638 | 36 | -3.562 | -3.561 | -3.562 | 16 | -2.465 | -2.465 | -2.341 | 4.315 | -3.236 | -3.235 | -2.615 | 10 | -2.041 | -2.04 | -2.041 | 21 | -1.553 | -1.552 | -1.553 | -8.096 | -2.441 | -2.441 | -2.438 | 31 | -2.185 | -2.033 | -3.851 | -104.763 | 7.293 | 6.882 | 7.462 | -6.269 | 5.778 | 5.777 | 5.777 |
| Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | -1.567 | -1.087 | 11 | -1.064 | -1.064 | -1.064 | 5.082 | -0.737 | -0.736 | -0.699 | 1.289 | -0.966 | -0.967 | -0.781 | 3.203 | -1.36 | -1.361 | -1.36 | 14 | -1.035 | -1.035 | -1.035 | -5.48 | -1.599 | -1.6 | -1.599 | 21 | -1.456 | -1.356 | -2.567 | -38.785 | -4.603 | -4.34 | 4.708 | 17 | -3.644 | -3.644 | 3.644 |
| Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 1600000.0 | -1100000.0 | -1000000.0 | -1100000.0 | 1000000.0 | 1100000.0 | -700000.0 | -700000.0 | 800000.0 | 700000.0 |
| Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 5.222 | 3.805 | 3.561 |
| Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 212 | 207 | 222 | 173 | 190 | 175 | 231 | 218 | 206 | 207 | 213 | 206 | 202 | 181 | 194 | 182 | 190 | 162 | 179 | 165 |
| Percentage of OtherCostAndExpenseOperating | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 7.498 | 5.237 | 4.406 | 4.496 | 6.176 | 3.995 | 3.979 | 6.065 | 4.497 | 3.462 | 3.824 | 3.404 | 4.391 | 3.309 | 1.505 | 0.838 | 21 | 0.75 | 1.771 | 0.71 | 0.941 | 0.637 | -2.994 | 7.508 | 1.96 | 1.304 | 1.246 | 2.506 | 1.392 | 25 | 13 | 1.077 | 0.806 | 2.596 | 0.935 | 0.919 | 4.898 | 2.274 | -4.235 | 13 | 0.773 | 2.287 | 5.764 | 2.097 | 7.552 | 1.053 |
| Percentage of OtherNonoperatingExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 7.005 | 0.215 | 9.355 | 8.175 | 17 | 8.522 | 5.373 | 6.643 | 5.682 | 9.36 | -6.993 | 5.072 | 1.857 | 0.738 | 3.715 | 3.296 | 4.033 | 4.341 | -3.26 | 4.242 | 4.804 | 0.305 | 0.119 | 0.071 | 0.06 | 3.136 | 2.481 | 0.1 | 3.213 | 1.409 | 7.831 | 6.154 | 3.134 | 7.364 | 1.009 | 5.049 | 0.686 | 9.861 | 0.383 | 0.124 | 0.341 | 3.369 | 6.624 | 6.71 | 0.711 | 2.909 |
| Percentage of OtherNonoperatingIncome | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 28 | 11 | 52 | 8.345 | 4.436 | -30.38 | 2.767 | 16 | -1.267 | -16.144 | 3.118 | 0.0 | 0.0 | 0.0 | 0.0 | -1.609 | -0.389 | -1.431 | -2.227 | 29 | -0.462 | 0.052 | -1.36 | -0.211 | -0.247 | -0.68 | -0.333 | 0.3 | 0.437 |
| Percentage of OtherOperatingActivitiesCashFlowStatement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2016-12-31 | 2016-09-30 | 2015-12-31 | 2015-09-30 | 2014-12-31 | 2014-09-30 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 |
| Value | 7.99 | 4.148 | 26 | 51 | 6.944 | 22 | 23 | -1.729 | 0.495 | -11.349 | -0.525 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -1.249 | -0.046 | -0.918 | -0.024 | -4.0 | 0.0 | 0.0 | 0.0 | 5.936 |
| Percentage of PaymentsForProceedsFromOtherInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -0.077 | 0.0 | 12 | 15 | -0.03 | 17 | 0.251 | 11 | 2.14 | 11 | 0.0 | 0.0 | 0.085 | 11 | 0.038 | 0.0 | 0.0 | 0.0 | 0.0 | 2.77 | 0.389 | 9.276 | 0.0 | 7.85 | 0.0 | -9.663 | 0.0 | 9.663 | 0.029 | 10 | 0.0 | 0.0 | 0.006 | 9.635 | 0.003 | 5.392 | 0.0 | 0.0 | 0.0 | 10 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of PaymentsOfFinancingCosts | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 0 | 5.5 | 0 |
| Percentage of PreferredStockDividendRatePercentage | 0.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | 1.504 | 10 | 9.528 | 4.199 | 11 | 6.949 | 11 | 4.922 | 63 | 13 | 7.144 | 6.025 | 4.867 | 8.721 | 7.165 | 6.641 | 7.536 | 7.4 | 9.026 | 6.645 | 24 | 11 | 8.804 | 6.297 | 8.86 | 9.954 | -3.818 | 8.476 | 11 | 4.725 | 6.243 | 6.933 | 11 | 6.698 | 9.543 | 11 | 10 | 4.062 |
| Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 10 | 5.23 | 9.707 | 5.175 | 9.374 | 4.784 | 8.853 | 8.41 | 4.601 | 1182 | 425 | 35 | 7.123 | 3.722 | 7.023 | 3.847 | 7.137 | 3.964 | 6.83 | 3.541 | 6.502 | 3.796 | 6.242 | 3.742 | 6.146 | 3.02 | 12 | 2.536 | 3.171 | 2.831 | 8.901 | 2.477 | 2.363 | 2.228 | 10 | 2.222 | -0.104 | 5.024 | 11 | 1.473 | 3.221 | 4.663 |
| Percentage of ProceedsFromIssuanceOfCommonStock | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2012-03-31 | 2011-03-31 |
| Value | -6.006 | -11.988 | -0.565 | -0.583 | -6.576 | -20.978 | -0.977 | -3.678 | -1.41 | -52.725 | -0.501 | -0.786 | 5.817 | -7.011 | -0.058 | -0.293 | -0.09 | -13.395 | 7.13 | 0.0 | 1.189 | -1.189 | 0.0 | -0.048 |
| Percentage of ProceedsFromPaymentsForOtherFinancingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 0.426 | 0.812 | 1.315 | 3.084 | 3.854 | 15 | 19 | 15 | 16 | 12 | 4.634 | 2.294 | 0.804 | 0.23 | 0.032 | 0.04 | 0.022 | 0.013 | 0.001 | 0.0 | 0.0 | 0.208 | 0.461 | 0.177 | 0.742 | 0.799 | 0.99 | 1.723 | 1.253 | 10 | 9.35 | 6.429 | 5.656 | 9.087 | 7.522 | 3.302 | 1.849 | 0.975 | 0.71 | 0.759 | 0.4 | 0.466 | 0.27 | 0.266 | 0.235 |
| Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 |
| Value | 12 | 15 | 27 | 35 | 41 | 45 | 40 | 41 | 40 | 41 | 40 | 37 | 38 | 37 | 40 | 39 | 39 | 36 | 35 | 36 | 34 | 33 | 30 | 28 | 25 | 19 | 18 | 15 | 14 | 14 | 17 | 15 | 12 | 7.8 | 8.8 | 9.0 | 8.9 |
| Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-09-30 | 2020-06-30 |
| Value | 54 | 25 | 101 |
| Percentage of RepaymentsOfDebt | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 |
| Value | 11 |
| Percentage of RepaymentsOfDebt | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 0.35 | 1.063 | 0.795 | 97 | 0.434 | 0.622 | 2.661 | 0.38 |
| Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 |
| Value | 14 | 6.677 | 5.789 | 949 | 7.089 | 7.075 | 11 | 6.26 | 9.239 | 9.429 | 7.085 | 1182 | 392 | 69 | 8.23 | 3.201 | 7.037 | 4.017 | 9.786 | 5.676 | 10 | 5.562 | 8.55 | 3.8 | 5.366 | 5.757 | 6.325 | 7.579 | 14 | 4.142 | 4.919 | 2.831 | 11 | 3.838 | 3.991 | 2.561 | 26 | 9.841 | 14 |
| Percentage of StockIssuedDuringPeriodValueOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 |
| Value | 7.115 | -10.159 | 0.803 | 939 | -9.286 | 4.238 | 6.335 | -24.779 | 4.818 | 4.721 | 4.535 | 1169 | 388 | 66 | 3.705 | -2.506 | 2.862 | 1.503 | 1.645 | -3.679 | -1.266 | -1.984 | 3.051 | -7.351 | 2.09 | 0.823 | 2.926 | -24.146 | 5.503 | 2.137 | 2.303 | -26.492 | 3.2 | 1.225 | 1.348 | -29.177 | 14 | 8.045 |
| Percentage of StockIssuedDuringPeriodValueOther | 49.7 | -152.1 | 13.9 | 98.9 | -131.0 | 59.9 | 54.0 | -395.8 | 52.1 | 50.1 | 64.0 | 98.9 | 98.9 | 96.4 | 45.0 | -78.3 | 40.7 | 37.4 | 16.8 | -64.8 | -12.2 | -35.7 | 35.7 | -193.4 | 38.9 | 14.3 | 46.3 | -318.6 | 38.5 | 51.6 | 46.8 | -935.8 | 27.2 | 31.9 | 33.8 | -1139.3 | 53.4 | 81.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 |
| Value | 7.208 | 16 | 4.986 | 10 | 16 | 2.837 | 5.391 | 31 | 4.421 | 4.708 | 2.55 | 13 | 4.218 | 2.514 | 4.525 | 5.707 | 4.175 | 2.514 | 8.141 | 9.355 | 11 | 7.546 | 5.499 | 11 | 3.276 | 4.934 | 3.399 | 31 | 8.794 | 2.005 | 2.616 | 29 | 8.556 | 2.613 | 2.643 | 31 | 12 | 1.796 |
| Percentage of StockIssuedDuringPeriodValueOther | 50.3 | 252.1 | 86.1 | 1.1 | 231.0 | 40.1 | 46.0 | 495.8 | 47.9 | 49.9 | 36.0 | 1.1 | 1.1 | 3.6 | 55.0 | 178.3 | 59.3 | 62.6 | 83.2 | 164.8 | 112.2 | 135.7 | 64.3 | 293.4 | 61.1 | 85.7 | 53.7 | 418.6 | 61.5 | 48.4 | 53.2 | 1035.8 | 72.8 | 68.1 | 66.2 | 1239.3 | 46.6 | 18.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 9.71 | -7.729 | 8.798 | 8.652 | -17.95 | 7.363 | 7.004 | -45.074 | -11.108 | 6.083 | 6.778 | 10 | -5.305 | -6.142 | -6.474 | -0.261 | -6.403 | -5.406 | -8.716 | 5.466 | -5.264 | 1.631 | -5.105 | 4.226 | -6.502 | 0.432 | -7.504 | 43 | -21.174 | -42.234 | -8.175 | -33.427 | -15.547 | 9.616 | 8.596 | -20.648 | 0.0 | 0.0 | 0.0 | 0.0 | -0.028 |
| Percentage of StockholdersEquityOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | 9.71 | -7.729 | 8.798 | 8.652 | -17.95 | 7.363 | 7.004 | -45.074 | -11.108 | 6.083 | 6.778 | 10 | -5.275 | -5.927 | -6.329 | -0.261 | -6.404 | -5.406 | -8.716 | 1.425 | -5.362 | 1.154 | -5.066 | 4.327 | -6.502 | 0.432 | -7.504 | 43 | -21.174 | -42.234 | 58 | -33.427 | -15.547 | 9.616 | 8.596 | -20.648 |
| Percentage of StockholdersEquityOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 99.4 | 96.5 | 97.8 | 100.0 | 100.0 | 100.0 | 100.0 | 26.1 | 101.9 | 70.8 | 99.2 | 102.4 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | -717.8 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 |
| Value | 41 | 44 | 27 | 31 | 34 | 31 | 27 | 26 | 30 | 33 | 22 | 24 | 28 | 29 | 22 | 24 | 24 | 27 | 24 | 18 | 24 | 21 | 21 | 17 | 24 | 24 | 15 | 19 | 18 | 22 | 24 | 27 | 30 | 19 | 21 | 23 | 27 |
| Percentage of TaxesExcludingIncomeAndExciseTaxes | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-09-30 | 2010-06-30 |
| Value | 566000.0 | 991000.0 | 407000.0 | 394000.0 | 1066000.0 | 1762000.0 | 1443000.0 | 2325000.0 | 2730000.0 | 2695000.0 | 2497000.0 | 2512000.0 | 2227000.0 | 1983000.0 | 1561000.0 | 1543000.0 | 290000.0 | 228000.0 | 273000.0 | 593000.0 | 1270000.0 | 1113000.0 | 1036000.0 | 3658000.0 | 2731000.0 | 3979000.0 | 4955000.0 | 4492.0 | 2117.0 | 2667.0 | 2693.0 | 2159.0 | 1208.0 | 1482.0 |
| Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2014-12-31 |
| Value | -11782000.0 | -8538000.0 | -16368000.0 | -19091000.0 | -20203000.0 | -16642000.0 | -8999000.0 | -12387000.0 | -7988000.0 | -4305000.0 | -1794000.0 | 4077000.0 | 2597000.0 | 1620000.0 | -1204000.0 | -1448000.0 | -1279000.0 | -861000.0 | -959000.0 | -3450000.0 | -2007000.0 | -500000.0 | 0 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangeinOtherComprehensiveIncomeLossfromEquityMethodInvestmentsEffectNetofTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | -178440000.0 | -186080000.0 | -193520000.0 | -201110000.0 |
| Percentage of AmountOfAccumulatedOtherComprehensiveIncomeLossAttributablePrimarilyToSettledInterestRateSwaps | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | -112720000.0 | -74784000.0 | -156620000.0 | -178630000.0 |
| Percentage of Amountofaccumulatedothercomprehensiveincomelossattributableprimarilytoforwardstartinginterestrateswaps. | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | -7000000.0 | 5500000.0 | -300000.0 | -2600000.0 |
| Percentage of CommodityCashFlowHedgeGainLossToBeReclassifiedAfterNext12MonthsNet | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 14 | 16 | 11 | 13 | 17 | 13 | 25 | 19 | 26 | 38 | 29 | 22 | 26 | 38 | 38 | 111 | 39 | 30 | 60 | 38 | 38 | 38 | 30 | 31 | 39 | 64 | 74 | 93 | 82 | 82 | 75 | 90 | 57 | 37 | 163 | 63 | 105 | 131 | 74 | 94 | 186 |
| Percentage of CommodityExchangesAndImbalances | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 244 | 209 | 186 | 125 | 108 | 55 | 104 | 103 | 100 | 120 | 110 | 162 | 136 | 124 | 164 | 189 | 114 | 114 | 142 | 105 | 77 | 74 | 96 | 91 | 94 | 104 | 171 | 207 | 216 | 212 | 227 | 199 | 201 | 272 | 213 | 201 | 201 | 202 | 236 | 313 | 288 |
| Percentage of CommodityExchangesAndImbalancesLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 |
| Value | 227 | 108 | 63 | 48 | 13 | 0.0 | 8.8 | 1.9 | 0.6 | 20 | 0.8 | 67 | 52 | 18 | 49 | 52 | 11 | 30 | 67 |
| Percentage of DerivativeCollateralRighttoReclaimCashTotal | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 68.0 | 0.62 | 0.6 | 0.58 | 0.57 | 0.53 | 0.67 | 0.52 | 0.55 | 0.56 |
| Percentage of EmployeeParticipationInPlanInHundredths | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 3.0 |
| Percentage of ForfeitureRateMaximumInHundredths | 100.0 |
| Period End | 2020-12-31 |
| Value | 5.5 |
| Percentage of IndebtednessToAdjustedEBITDAFromAcquisitionsMaximum | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 4.4 | 4.6 | 4.6 | 4.6 |
| Percentage of IndebtednessToAdjustedEbitdaCurrent | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 125 | 41 |
| Percentage of LeaseLiabilities | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 125 | 42 |
| Percentage of LeasedAssets | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 3500 |
| Percentage of LineOfCreditFacilityOptionToIncreaseBorrowingCapacity | 100.0 |
| Period End | 2020-12-31 |
| Value | 100 |
| Percentage of LineOfCreditFacilitySublimit | 100.0 |
| Period End | 2020-12-31 |
| Value | 200 |
| Percentage of LineofCreditFacilitySwinglineSubfacility | 100.0 |
| Period End | 2020-12-31 |
| Value | 10.0 |
| Percentage of MaximumAllowablePercentageOfAnnualBasePayWithheldToPurchaseOurCommonStock | 100.0 |
| Period End | 2020-12-31 |
| Value | 16 |
| Percentage of NetProceedsFromExitOfAnInvestmentInAnInsuranceContract | 100.0 |
| Period End | 2020-12-31 |
| Value | 85.0 |
| Percentage of PurchasePricePercentageOfLowerOfItsGrantDateOrExerciseDateMarketPriceInHundredths | 100.0 |
| Period End | 2020-12-31 |
| Value | 15 |
| Percentage of SeniorNoteCovenantAccelerationOfIndebtedness | 100.0 |
| Period End | 2020-12-31 |
| Value | 101.0 |
| Percentage of SeniorNoteCovenantRedemptionPriceUponEventOfDefault | 100.0 |
| Period End | 2020-12-31 |
| Value | 25.0 |
| Percentage of SeniorNoteCovenantTrusteeOrHoldersPercentageRequiredUponEventOfDefault | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-06-30 | 2015-12-31 |
| Value | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 15 | 16 | 16 | 17 | 17 | 18 | 18 | 18 | 19 | 19 | 20 | 21 | 21 |
| Percentage of UnamortizedPortionofTerminatedSwaps | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | -149750000.0 | -42201000.0 | -27303000.0 | -10988000.0 |
| Percentage of UnrealizedGainLossOnCashFlowHedgesNetOfTaxAccumulatedOtherComprehensiveIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 227 |
| Percentage of UnrecordedPurchaseObligationDueAfterFiveYears | 100.0 |
| Period End | 2020-12-31 |
| Value | 70 |
| Percentage of UnrecordedPurchaseObligationDueCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 53 |
| Percentage of UnrecordedPurchaseObligationDueInFourYears | 100.0 |
| Period End | 2020-12-31 |
| Value | 55 |
| Percentage of UnrecordedPurchaseObligationDueInThreeYears | 100.0 |
| Period End | 2020-12-31 |
| Value | 60 |
| Percentage of UnrecordedPurchaseObligationDueInTwoYears | 100.0 |
| Period End | 2020-12-31 |
| Value | 516 |
| Percentage of UnrecordedPurchaseObligationTotal | 100.0 |
| Period End | 2020-12-31 |
| Value | 47 |
| Percentage of Unrecordedpurchaseobligationdueinfiveyears | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2013-12-31 |
| Value | 5.2 | 8.4 | 13 | 9.7 | 14 | 13 | 13 | 13 | 14 | 14 | 12 | 12 | 12 | 13 | 13 | 12 | 13 | 11 | 11 | 12 | 11 | 8.0 | 9.4 | 10 | 7.4 | 20 | 6.9 |
| Percentage of AccountsPayableRelatedPartiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 |
| Value | -440.911 | -303.061 | -377.446 | -390.731 | -380.342 | -354.825 | -233.52 | -294.203 | -211.429 | -145.775 | -64.66 | -45.724 | -61.459 | -53.35 | -81.915 | -85.209 | -77.651 | -39.006 | -52.155 | -70.833 | -74.358 | -49.617 | -42.699 | -43.473 | -40.254 | -42.371 | -37.349 | -40.289 | -43.468 | -38.258 | -43.168 | -35.853 | -36.064 | -53.861 | -55.03 | -72.602 | -43.452 | -22.538 | -55.367 | -35.653 | 2.76 | 15 | -6.151 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 |
| Value | 148 | 153 | 157 | 120 | 124 | 127 | 131 | 114 | 116 | 119 | 121 | 116 | 119 | 122 | 105 | 95 | 97 | 99 | 101 | 79 | 81 | 82 | 84 | 92 | 95 | 97 | 99 | 68 | 70 | 72 | 79 | 184 | 177 | 170 | 162 | 169 | -163.295 | -157.518 | -151.741 | 139 | 135 | 125 | -113.903 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 19 | 2.721 | 3.314 | 6.704 | 6.475 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax | 12.2 | 2.1 | 2.7 | 6.4 | 6.4 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 136 | 127 | 116 | 98 | 94 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax | 86.8 | 96.7 | 96.0 | 93.6 | 93.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2018-01-01 |
| Value | 52 | 33 | 41 | 46 | 50 | 45 | 57 | 45 | 50 | 31 | 31 | 38 | 42 | 2.12e-05 | 3.3299999999999996e-05 |
| Percentage of ContractWithCustomerLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 |
| Value | 16 | 17 | 17 | 18 | 19 | 33 | 34 | 20 | 20 | 20 | 16 |
| Percentage of ContractWithCustomerLiabilityNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 14292 | 14304 | 14361 | 14385 | 14415 | 14274 | 12813 | 12595 | 11147 | 10399 | 9451 | 9023 | 8236 | 8082 | 9198 | 9518 | 9649 | 9667 | 9489 | 8830 | 8832 | 8834 | 8486 | 7194 | 7756 | 6514 | 4875 |
| Percentage of DebtInstrumentCarryingAmount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2018-09-30 |
| Value | 1000 | 1000 | 1000 | 1000 | 450 |
| Percentage of DebtInstrumentFaceAmount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2015-12-31 |
| Value | 131 | 134 | 138 | 142 | 145 | 135 | 121 | 123 | 101 | 103 | 87 | 87 | 73 | 75 | 78 | 80 | 63 | 66 | 68 | 70 | 72 | 74 |
| Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 2524 | 1667 | 801 | 141 |
| Percentage of DeferredIncomeTaxLiabilities | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 1976 | 1225 | 655 | 361 | 219 | 252 | 236 | 275 | 302 | 302 | 188 |
| Percentage of DeferredTaxAssetsGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 1473 | 858 | 420 | 159 | 26 | 76 | 80 | 12 | 0.0 |
| Percentage of DeferredTaxAssetsOperatingLossCarryforwards | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 258 | 171 | 108 | 73 | 39 | 39 | 38 | 38 | 31 |
| Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 12 | 12 | 13 | 13 | 2.425 | 12 | 13 | 20 | 33 | 31 | 25 |
| Percentage of DeferredTaxAssetsOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 134 | 83 | 22 | 30 | 32 | 26 | 22 | 78 | 140 | 134 | 73 |
| Percentage of DeferredTaxAssetsOtherComprehensiveLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 96 | 99 | 91 | 85 | 118 | 97 | 81 | 78 | 128 | 136 | 89 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | -6322000.0 | -1389000.0 | -1567000.0 | -4398000.0 | -4316000.0 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | -49251000.0 | -46354000.0 | -43286000.0 | -62214000.0 | -63174000.0 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions | 779.0 | 3337.2 | 2762.3 | 1414.6 | 1463.7 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 2437 | 1582 | 728 | 77 | 1726 | 1585 | 1466 | 1217 | 969 | 851 | 729 |
| Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 87 | 84 | 73 | 64 | 107 | 93 | 89 | 822 | 760 | 664 | 519 |
| Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 548 | 498 | 434 | 456 | 407 |
| Percentage of DefinedBenefitPlanAccumulatedBenefitObligation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 25 | 4.11 | 4.881 | 11 | 10 |
| Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 186 | 173 | 160 | 160 | 157 |
| Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax | 728.3 | 4222.7 | 3282.4 | 1449.5 | 1463.6 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | -25.558 | -4.11 | -5.108 | -12.991 | -14.341 |
| Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | -185.662 | -172.952 | -160.212 | -160.921 | -157.935 |
| Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax | 726.4 | 4208.1 | 3136.5 | 1238.7 | 1101.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 0.487 | 0.601 | 0.0 | 0.0 | 0.0 |
| Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | -33.641 | -13.249 | -16.04 | -23.805 | -25.273 |
| Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | -203.98 | -188.057 | -176.31 | -175.607 | -166.715 |
| Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet | 606.3 | 1419.4 | 1099.2 | 737.7 | 659.7 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 116 | 98 | 87 |
| Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet | -345.4 | -746.5 | -546.8 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 2.75 | 0.035 | 0.045 | 0.0375 | 0.0425 |
| Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 3.0 | 0.035 | 0.045 | 0.0375 | 0.045 |
| Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate | 109.1 | 100.0 | 100.0 | 100.0 | 105.9 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 3.6 | 0.037 | 0.0365 | 0.03 | 0.031 |
| Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Value | 54 | 52 | 46 | 57 | 54 | 49 |
| Percentage of DefinedBenefitPlanBenefitObligation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Value | 583 | 534 | 466 | 481 | 428 | 390 |
| Percentage of DefinedBenefitPlanBenefitObligation | 1069.6 | 1022.5 | 997.0 | 831.3 | 781.4 | 789.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 15 | 16 | 16 | 19 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 127 | 123 | 122 | 117 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter | 801.6 | 756.5 | 754.2 | 606.4 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 3.297 | 3.422 | 3.114 | 3.452 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 19 | 18 | 17 | 16 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths | 590.2 | 534.1 | 546.4 | 486.6 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 3.322 | 3.446 | 3.315 | 4.023 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 23 | 22 | 21 | 21 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive | 700.2 | 645.0 | 644.4 | 525.9 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 3.335 | 3.454 | 3.346 | 3.993 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 22 | 21 | 20 | 20 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour | 666.7 | 612.9 | 606.1 | 506.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 3.371 | 3.519 | 3.23 | 3.859 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 21 | 20 | 19 | 18 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree | 629.4 | 574.1 | 594.9 | 491.6 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 3.408 | 3.399 | 3.237 | 3.653 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 20 | 19 | 18 | 18 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo | 596.4 | 566.4 | 561.1 | 493.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | -33641000.0 | -13249000.0 | -16040000.0 | -23805000.0 | -25273000.0 |
| Percentage of DefinedBenefitPlanFundedStatusOfPlan | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | -203980000.0 | -188060000.0 | -176310000.0 | -175610000.0 | -166720000.0 |
| Percentage of DefinedBenefitPlanFundedStatusOfPlan | 606.3 | 1419.4 | 1099.2 | 737.7 | 659.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 27 | 6.38 | 6.697 | 4.963 | 29 | 37 | 10 |
| Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 268 | 113 | 103 | 41 | 51 | 130 | 55 |
| Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement | 980.3 | 1783.3 | 1550.0 | 844.2 | 178.2 | 346.5 | 510.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 295 | 120 | 110 | 46 | 81 | 167 | 66 |
| Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement | 1080.3 | 1883.3 | 1650.0 | 944.2 | 278.2 | 446.5 | 610.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 27 | 6.38 | 6.697 | 4.963 | 29 | 37 | 10 |
| Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 0.241 | 0.0 | 0.0 | 0.581 |
| Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement | 3.8 | 0.0 | 0.0 | 5.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 268 | 113 | 103 | 41 | 51 | 130 | 55 |
| Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement | 980.3 | 1783.3 | 1550.0 | 844.2 | 178.2 | 346.5 | 510.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 295 | 120 | 110 | 46 | 81 | 167 | 67 |
| Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement | 1080.3 | 1887.1 | 1650.0 | 944.2 | 278.2 | 446.5 | 615.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2018-12-31 |
| Value | 295 | 120 | 110 | 46 | 52 | 140 | 28 | 40 | 38 | 32 |
| Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2015-12-31 |
| Value | 295 | 120 | 110 | 46 | 52 | 140 | 28 | 40 | 38 | 27 | 32 | 54 | 24 | 23 | 24 | 17 | 15 | 17 | 4.76 | 7.389 | 42 |
| Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2011-12-31 |
| Value | 0.241 | 28 | 27 | 38 | 40 | 29 | 7.903 | 67 | 50 | 29 | 83 | 49 | 45 | 39 | 49 | 48 | 4.618 | 6.269 | 29 | 7.351 | 22 | 31 | 30 | 29 | 30 | 27 | 40 | 60 | 61 | 69 | 30 | 51 | 61 |
| Percentage of DerivativeAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-06-30 | 2010-12-31 |
| Value | 33 | 53 | 28 | 34 | 21 | 16 | 17 | 20 | 27 | 10 | 17 | 16 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 3.5 | 2.8 | 15 | 0.0 | 0.7 | 27 | 4.5 | 7.6 | 8.4 | 0.3 | 1.7 | 0.9 | 1.1 |
| Percentage of DerivativeCollateralRightToReclaimCash | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-06-30 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2010-12-31 |
| Value | 295 | 120 | 110 | 46 | 81 | 67 | 67 | 100 | 104 | 53 | 106 | 74 | 63 | 54 | 66 | 53 | 12 | 17 | 63 | 49 | 51 | 44 | 49 | 55 | 33 | 29 | 42 | 64 | 109 | 112 | 70 | 102 | 200 | 419 | 676 | 630 | 315 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 287 | 113 | 107 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 97.2 | 94.6 | 97.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 8.198 | 6.247 | 3.037 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 2.8 | 5.2 | 2.7 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2015-12-31 |
| Value | 107 | 46 | 80 | 167 | 64 | 72 | 62 | 30 | 78 | 46 | 18 | 16 | 16 | 9.18 | 7.577 | 6.154 | 1.155 | 39 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 97.3 | 99.1 | 99.8 | 0.0 | 96.8 | 0.0 | 92.6 | 0.0 | 78.8 | 44.4 | 34.4 | 15.7 | 22.8 | 14.4 | 13.8 | 9.3 | 2.2 | 78.9 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-06-30 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2015-12-31 |
| Value | 3.037 | 0.408 | 0.172 | 0.0 | 0.089 | 0.0 | 4.257 | 5.221 | 3.465 | 7.477 | 5.862 | 2.587 | 4.451 | 4.346 | 6.919 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 2.7 | 0.9 | 0.2 | 0.0 | 0.1 | 0.0 | 4.1 | 9.7 | 3.2 | 10.0 | 9.2 | 4.7 | 6.7 | 8.2 | 13.9 |
| Period End | 2021-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 |
| Value | 0.241 | 0.0 | 0.0 | 0.0 | 0.0 | 19 | 0.0 | 0.0 | 59 | 1.33 | 0.252 | 0.493 | 0.09 | 0.0 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 19.0 | 0.0 | 0.0 | 55.7 | 1.8 | 0.4 | 0.9 | 0.1 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2011-12-31 |
| Value | 287 | 114 | 107 | 46 | 80 | 167 | 67 | 80 | 67 | 35 | 100 | 100 | 48 | 103 | 66 | 56 | 51 | 61 | 48 | 9.623 | 14 | 55 | 42 | 50 | 44 | 48 | 55 | 33 | 29 | 42 | 63 | 77 | 79 | 33 | 58 | 81 | 136 | 184 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 97.2 | 94.8 | 97.3 | 99.1 | 99.8 | 0.0 | 100.0 | 0.0 | 99.9 | 0.0 | 100.0 | 95.9 | 90.3 | 96.8 | 90.0 | 89.6 | 94.3 | 92.3 | 91.8 | 80.1 | 85.0 | 87.2 | 86.1 | 98.0 | 98.5 | 98.8 | 100.0 | 99.0 | 99.8 | 99.9 | 98.6 | 70.5 | 70.2 | 46.6 | 56.9 | 40.4 | 32.6 | 29.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-06-30 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2010-12-31 |
| Value | 8.198 | 6.247 | 3.037 | 0.408 | 0.172 | 0.0 | 0.089 | 0.0 | 4.257 | 5.221 | 3.465 | 7.477 | 6.588 | 3.127 | 5.131 | 4.346 | 2.384 | 2.58 | 8.145 | 6.919 | 1.021 | 0.686 | 0.575 | 0.0 | 0.346 | 0.064 | 0.031 | 0.911 | 32 | 33 | 37 | 44 | 119 | 282 | 529 | 446 | 179 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 2.8 | 5.2 | 2.7 | 0.9 | 0.2 | 0.0 | 0.1 | 0.0 | 4.1 | 9.7 | 3.2 | 10.0 | 10.4 | 5.7 | 7.7 | 8.2 | 19.9 | 15.0 | 12.8 | 13.9 | 2.0 | 1.5 | 1.2 | 0.0 | 1.0 | 0.2 | 0.1 | 1.4 | 29.5 | 29.8 | 53.4 | 43.1 | 59.6 | 67.4 | 78.2 | 70.8 | 56.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-06-30 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2013-12-31 | 2012-12-31 |
| Value | 636 | 271 | 349 | 292 | 297 | 231 | 295 | 131 | 102 | 67 | 36 | 58 | 47 | 34 | 43 | 72 | 94 | 102 | 56 | 17 | 19 | 7.368 | 13 | 46 | 26 | 29 | 15 | 44 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 481 | 168 | 142 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 75.7 | 61.9 | 40.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 8.17 | 6.187 | 3.038 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 1.3 | 2.3 | 0.9 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 |
| Value | 142 | 60 | 56 | 73 | 26 | 36 | 36 | 24 | 31 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 40.8 | 20.6 | 19.0 | 0.0 | 11.7 | 0.0 | 12.4 | 0.0 | 24.1 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-06-30 | 2018-12-31 |
| Value | 3.038 | 0.376 | 0.171 | 0.0 | 0.0 | 0.0 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 0.9 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2015-12-31 |
| Value | 91 | 65 | 0.0 | 28 | 90 | 14 | 83 | 4.714 | 15 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 16 | 11 | 12 | 9.936 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 14.3 | 24.0 | 0.0 | 0.0 | 38.9 | 0.0 | 28.1 | 0.0 | 11.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 48.7 | 26.3 | 17.7 | 55.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 |
| Value | 55 | 32 | 203 | 231 | 241 | 241 | 111 | 262 | 173 | 145 | 84 | 0.0 | 5.29 | 11 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 8.7 | 11.8 | 58.3 | 79.2 | 81.0 | 0.0 | 48.3 | 0.0 | 58.8 | 0.0 | 63.8 | 0.0 | 7.8 | 30.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2013-12-31 | 2012-12-31 |
| Value | 628 | 265 | 345 | 292 | 297 | 344 | 231 | 317 | 295 | 177 | 131 | 98 | 62 | 32 | 51 | 40 | 31 | 38 | 67 | 92 | 100 | 48 | 11 | 18 | 7.033 | 13 | 45 | 26 | 29 | 14 | 5.011 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 98.7 | 97.7 | 99.1 | 99.9 | 99.9 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 95.9 | 92.3 | 90.6 | 87.6 | 85.0 | 90.0 | 89.6 | 94.1 | 98.3 | 97.4 | 85.3 | 63.3 | 96.0 | 95.5 | 98.5 | 100.0 | 99.7 | 100.0 | 88.0 | 11.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-06-30 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2013-12-31 | 2012-12-31 |
| Value | 8.17 | 6.187 | 3.038 | 0.376 | 0.171 | 0.0 | 0.0 | 0.0 | 4.238 | 5.181 | 3.409 | 7.311 | 7.152 | 3.458 | 4.464 | 4.239 | 1.645 | 2.689 | 8.298 | 6.586 | 0.791 | 0.335 | 0.204 | 0.023 | 0.075 | 0.0 | 1.92 | 39 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 1.3 | 2.3 | 0.9 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 4.1 | 7.7 | 9.4 | 12.4 | 15.0 | 10.0 | 10.4 | 5.9 | 1.7 | 2.6 | 14.7 | 36.7 | 4.0 | 4.5 | 1.5 | 0.0 | 0.3 | 0.0 | 12.0 | 88.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2011-12-31 |
| Value | 146 | 97 | 203 | 231 | 245 | 270 | 202 | 276 | 257 | 149 | 99 | 2.01 | 7.144 | 12 | 4.813 | 4.282 | 18 | 13 | 15 | 72 | 75 | 43 | 9.936 | 13 | 0.254 | 9.947 | 44 | 5.557 | 0.976 | 10 | 10 | 139 |
| Percentage of DerivativeLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2015-12-31 |
| Value | 194 | 54 | 35 | 13 | 0.0 | 0.0 | 46 | 36 | 0.7 | 29 | 25 | 0.9 | 12 | 51 | 14 | 16 | 0.0 |
| Percentage of DerivativeLiabilityCollateralRightToReclaimCashOffset | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2018-12-31 |
| Value | 490 | 174 | 145 | 60 | 52 | 73 | 28 | 40 | 38 | 32 |
| Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2015-12-31 |
| Value | 490 | 174 | 145 | 60 | 52 | 73 | 28 | 40 | 38 | 27 | 32 | 100 | 60 | 23 | 53 | 43 | 16 | 29 | 56 | 22 | 8.026 |
| Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 99 | 18 | 10 | 13 | 10 | 0.911 | 4.811 |
| Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 390 | 155 | 135 | 47 | 46 | 72 | 24 |
| Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement | 391.3 | 819.4 | 1288.2 | 349.7 | 448.3 | 7999.0 | 515.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 490 | 174 | 145 | 60 | 56 | 73 | 29 |
| Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement | 491.3 | 919.4 | 1388.2 | 449.7 | 548.3 | 8099.1 | 615.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 99 | 18 | 10 | 13 | 10 | 0.911 | 4.811 |
| Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 146 | 97 | 203 | 231 | 241 | 270 | 201 |
| Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement | 146.8 | 512.8 | 1939.2 | 1717.3 | 2330.0 | 29670.4 | 4197.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 390 | 155 | 135 | 47 | 46 | 72 | 24 |
| Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement | 391.3 | 819.4 | 1288.2 | 349.7 | 448.3 | 7999.0 | 515.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 636 | 271 | 349 | 292 | 297 | 344 | 231 |
| Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement | 638.1 | 1432.2 | 3327.5 | 2167.0 | 2878.3 | 37769.5 | 4812.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2018-12-31 |
| Value | 1100 | 1100 | 1100 | 1100 | 1100 | 1100 | 1800 | 1800 | 3000 |
| Percentage of DerivativeNotionalAmount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 1100 | 1100 | 3100 |
| Percentage of DerivativeNotionalAmount | 100.0 | 100.0 | 172.2 |