| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA | ██▇▇▇▇▇▇▇▇▇▇▇▆▆▃▁ | 3.16 | 3.156 | 3.005 | 3.003 | 3.001 | 3.0 | 2.998 | 2.966 | 2.96 | 2.959 | 2.954 | 2.844 | 2.861 | 2.736 | 2.585 | 1.848 | 1.294 | NA | NA |
| us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding | NA | 308.541502 | 301.412243 | 301.305068 | NA | 301.032855 | 299.991084 | 297.444941 | NA | 296.967649 | 295.462572 | 286.727863 | NA | 289.15306 | 258.900456 | NA | NA | NA | NA | |
| us-gaap:WeightedAverageNumberOfSharesOutstandingBasic | NA | 308.080226 | 301.011545 | 300.813069 | NA | 300.580978 | 299.466526 | 296.833755 | NA | 296.214509 | 295.462572 | 286.183429 | NA | 266.767313 | NA | NA | NA | NA | NA | |
| us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount dei:LegalEntity,us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities amh:AmericanHomes4RentLimitedPartnership,amh:PerformanceShareUnitsPSUs | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities amh:PerformanceShareUnitsPSUs | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:EarningsPerShareBasic | █▇▆▇███▆▇▆▂▅▁▅▄ | 0.09000000000000002 | 0.07 | 0.05 | 0.07 | 0.08 | 0.08 | 0.08 | 0.05 | 0.06 | 0.05 | -0.05 | 0.02 | -0.08 | 0.01 | 0.0 | NA | NA | NA | NA |
| us-gaap:EarningsPerShareDiluted | █▇▆▇███▆▇▆▂▅▁▄▄ | 0.09000000000000002 | 0.07 | 0.05 | 0.07 | 0.08 | 0.08 | 0.08 | 0.05 | 0.06 | 0.05 | -0.05 | 0.02 | -0.08 | 0.0 | 0.0 | NA | NA | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net profit Margin dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | ▇█▅▆▅▇▅▅▄▅▄▃▂▂▁ | 299.335 | 310.809 | 283.098 | 289.594 | 284.01 | 298.304 | 281.86 | 279.204 | 270.316 | 280.052 | 264.483 | 258.004 | 242.801 | 246.836 | 237.008 | NA | NA | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 |
|---|
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AllocatedShareBasedCompensationExpense | █▄▄▄▂▂▂▂▁▁▂ | 3.766 | 2.17 | 2.09 | 1.808 | 1.299 | 1.288 | 1.269 | 0.952 | 0.683 | 0.832 | 0.943 | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | █▇▆▇██▇▇▇▇▂▆▁▅▄▇█ | 4.444 | 3.784 | 2.621 | 3.466 | 4.055 | 4.063 | 3.967 | 2.988 | 3.278 | 2.835 | -3.209 | 2.643 | -4.499 | 0.309 | -0.031 | 3.798 | 4.664 | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | █▇▆▇▇▇▇▆▆▆▅▆▆▄▄▁▂ | 45.101 | 39.912 | 31.567 | 37.286 | 41.223 | 41.16 | 40.064 | 32.85 | 34.494 | 30.04 | 25.657 | 30.958 | 30.608 | 19.097 | 15.066 | -3.861 | 1.123 | NA | NA |
| us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity,us-gaap:ProductOrService amh:AmericanHomes4RentLimitedPartnership,us-gaap:ManagementService | ▇▆▇█▆▇▆▅▂▃▃▃▁▁▁ | 22.38 | 21.976 | 22.26 | 23.276 | 21.822 | 22.727 | 21.65 | 20.709 | 18.105 | 18.865 | 18.616 | 18.987 | 17.345 | 17.447 | 17.442 | NA | NA | NA | NA |
| us-gaap:CostOfGoodsAndServicesSold dei:LegalEntity,us-gaap:ProductOrService amh:AmericanHomes4RentLimitedPartnership,us-gaap:RealEstate | ▅█▅▅▄▇▄▅▃▆▃▄▁▃▁ | 106.16 | 126.174 | 110.436 | 107.497 | 102.788 | 119.791 | 104.591 | 106.684 | 99.475 | 113.6 | 98.843 | 100.987 | 87.871 | 97.944 | 85.954 | NA | NA | NA | NA |
| us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:ManagementService | ▇▆▇█▆▇▆▅▂▃▃▃▁▁▁ | 22.38 | 21.976 | 22.26 | 23.276 | 21.822 | 22.727 | 21.65 | 20.709 | 18.105 | 18.865 | 18.616 | 18.987 | 17.345 | 17.447 | 17.442 | NA | NA | NA | NA |
| us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:RealEstate | ▅█▅▅▄▇▄▅▃▆▃▄▁▃▁ | 106.16 | 126.174 | 110.436 | 107.497 | 102.788 | 119.791 | 104.591 | 106.684 | 99.475 | 113.6 | 98.843 | 100.987 | 87.871 | 97.944 | 85.954 | NA | NA | NA | NA |
| us-gaap:GeneralAndAdministrativeExpense | ██▇▇▇▇▆▆▅▆▆▆▅▅▆▂▁▂▁ | 13.188 | 12.57 | 11.493 | 11.266 | 12.178 | 11.107 | 10.486 | 9.435 | 8.402 | 9.265 | 9.677 | 9.231 | 7.986 | 8.525 | 8.926 | 2.742 | 0.811 | 2.291 | 1.487 |
| us-gaap:IncomeLossFromContinuingOperations dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | NA | 40.153 | 31.807 | 37.527 | 41.464 | 41.401 | 40.304 | 33.091 | 34.734 | 30.281 | 25.898 | 21.525 | 30.533 | 19.097 | 15.066 | NA | NA | NA | NA | |
| us-gaap:IncomeLossFromContinuingOperations dei:LegalEntity,us-gaap:PartnerCapitalComponents,us-gaap:PartnerTypeOfPartnersCapitalAccount amh:AmericanHomes4RentLimitedPartnership,us-gaap:CommonStock,us-gaap:GeneralPartner | NA | 22.552 | 15.369 | 20.244 | NA | 23.52 | 22.518 | 16.283 | 17.632 | 15.177 | 17.064 | 5.814 | 20.422 | NA | NA | NA | NA | NA | NA | |
| us-gaap:IncomeLossFromContinuingOperations dei:LegalEntity,us-gaap:PartnerCapitalComponents,us-gaap:PartnerTypeOfPartnersCapitalAccount amh:AmericanHomes4RentLimitedPartnership,us-gaap:CommonStock,us-gaap:LimitedPartner | NA | 3.819 | 2.656 | 3.501 | NA | 4.099 | 4.004 | 3.026 | 3.32 | 2.881 | -2.902 | 1.125 | -4.618 | NA | NA | NA | NA | NA | NA | |
| us-gaap:IncomeLossFromContinuingOperations dei:LegalEntity,us-gaap:PartnerCapitalComponents,us-gaap:PartnerTypeOfPartnersCapitalAccount amh:AmericanHomes4RentLimitedPartnership,us-gaap:PreferredStock,us-gaap:GeneralPartner | NA | 13.782 | 13.782 | 13.782 | NA | 13.782 | 13.782 | 13.782 | 13.782 | 12.223 | 11.984 | 14.597 | 14.596 | NA | NA | NA | NA | NA | NA | |
| us-gaap:InterestExpense | ▇▇▇▇███████▇▇▇▇▁▁ | 28.498 | 29.267 | 29.558 | 29.715 | 31.163 | 31.465 | 32.571 | 31.915 | 30.691 | 30.93 | 31.978 | 29.301 | 25.747 | 26.592 | 28.392 | 0.0 | 0.0 | NA | NA |
| us-gaap:InterestPaidNet | ▁▇▁▇▂█▂▅▃▆▃▃▃▃▄ | 16.418 | 37.869 | 17.405 | 37.987 | 19.079 | 40.921 | 20.938 | 32.042 | 24.114 | 33.279 | 24.973 | 22.69 | 22.944 | 23.807 | 25.67 | NA | NA | NA | NA |
| us-gaap:LitigationSettlementExpense us-gaap:RelatedPartyTransactionsByRelatedParty amh:FormerEmployee | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic | █▇▆▇█▇▇▆▇▆▂▅▁▄▄▃▂▄▄ | 27.081 | 22.552 | 15.369 | 20.244 | 23.59 | 23.52 | 22.518 | 16.283 | 17.632 | 15.177 | -15.151 | 5.814 | -21.994 | 1.535 | -0.186 | -7.659 | -13.997 | -2.675 | -1.566 |
| us-gaap:OperatingExpenses | ██▇▇▇█▇▇▇▇▇▇▆▇▆▂▂▁▁ | 264.349 | 283.078 | 261.942 | 262.832 | 253.524 | 270.424 | 254.622 | 251.762 | 243.079 | 254.724 | 240.378 | 239.947 | 214.219 | 238.025 | 216.201 | 52.886 | 28.928 | 3.658 | 1.75 |
| us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax | NA | NA | -0.24 | -0.241 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | NA | NA | -0.24 | -0.241 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax dei:LegalEntity,us-gaap:PartnerCapitalComponents amh:AmericanHomes4RentLimitedPartnership,us-gaap:AccumulatedOtherComprehensiveIncome | NA | NA | -0.24 | -0.241 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome | NA | NA | -0.205 | -0.206 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest | NA | NA | -0.035 | -0.035 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:Parent | NA | NA | -0.205 | -0.206 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:PreferredStockDividendsIncomeStatementImpact | ▇▇▇▇▇▇▇▇▇▆▆▇▇█▇▁ | 13.782 | 13.782 | 13.782 | 13.782 | 13.782 | 13.782 | 13.782 | 13.782 | 13.782 | 12.223 | 11.984 | 14.597 | 14.596 | 17.253 | 15.282 | 0.0 | NA | NA | NA |
| us-gaap:ProfitLoss | █▇▆▇▇▇▇▆▆▆▅▅▆▄▄▁▂▁▁ | 45.342 | 40.153 | 31.807 | 37.527 | 41.464 | 41.401 | 40.304 | 33.091 | 34.734 | 30.281 | 25.898 | 21.525 | 30.533 | 19.097 | 15.066 | -3.861 | 1.123 | -2.675 | -1.566 |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:RelatedPartyTransactionsByRelatedParty us-gaap:ManagementService,us-gaap:CorporateJointVenture | █▇▅▄▅▄▃▃▅▁ | 1.9 | 1.7 | 1.3 | 0.9 | 1.2 | 1.0 | 0.7 | 0.7 | 1.2 | 0.3 | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:Revenues | ██▇█▇█▇▇▇▇▇▇▆▇▆▂▁▁▁ | 299.335 | 310.809 | 283.098 | 289.594 | 284.01 | 298.304 | 281.86 | 279.204 | 270.316 | 280.052 | 264.483 | 258.004 | 242.801 | 246.836 | 237.008 | 49.463 | 18.12 | 0.983 | 0.184 |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 |
|---|
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:Assets | ████▇▇▇█▇▇▇▇▇▇▆▁▁ | 9593.625 | 9600.363 | 9271.774 | 9201.365 | 9100.109 | 9140.121 | 9142.623 | 9191.038 | 9001.481 | 8971.426 | 8830.448 | 8958.033 | 8608.768 | 8509.876 | 8146.307 | 3885.261 | 3482.695 | NA | NA |
| us-gaap:Liabilities | ████████▇▇▇█▇▇▇▁▂ | 3121.195 | 3145.924 | 3241.965 | 3176.61 | 3081.319 | 3132.932 | 3147.1 | 3215.666 | 3027.739 | 2982.422 | 2961.686 | 3117.383 | 2732.944 | 2671.449 | 2734.553 | 395.968 | 831.359 | NA | NA |
| us-gaap:LiabilitiesAndStockholdersEquity | ████▇▇▇█▇▇▇▇▇▇▆▁▁ | 9593.625 | 9600.363 | 9271.774 | 9201.365 | 9100.109 | 9140.121 | 9142.623 | 9191.038 | 9001.481 | 8971.426 | 8830.448 | 8958.033 | 8608.768 | 8509.876 | 8146.307 | 3885.261 | 3482.695 | NA | NA |
| us-gaap:StockholdersEquity | ██▇▇▇▇▇▇▇▇▇▇▇▇▆▃▁ | 5789.094 | 5769.009 | 5345.561 | 5340.527 | 5335.426 | 5325.279 | 5312.464 | 5259.87 | 5251.965 | 5268.659 | 5148.53 | 5116.109 | 5149.629 | 5103.589 | 4673.057 | 2771.997 | 1934.686 | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CashAndCashEquivalentsAtCarryingValue | ▄█▁▁▁▄▃▄▁▃▂▅▁▆▂▄▆ | 137.06 | 315.808 | 32.01 | 33.108 | 37.575 | 171.209 | 119.176 | 154.584 | 30.284 | 110.138 | 53.504 | 203.883 | 46.156 | 243.547 | 67.325 | 158.065 | 251.406 | NA | NA |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | ▄█▁▁▁▄▄▅▁▄▂▆▂▆▂ | 265.077 | 442.027 | 161.245 | 161.729 | 164.119 | 298.01 | 284.91 | 312.747 | 175.214 | 266.164 | 212.514 | 360.155 | 182.823 | 363.121 | 195.849 | NA | NA | NA | NA |
| us-gaap:Land | █████▇▇▇▇▇▇▇▇▇▆▁▁ | 1836.798 | 1813.951 | 1794.943 | 1784.804 | 1756.504 | 1736.13 | 1727.94 | 1729.528 | 1713.496 | 1689.207 | 1670.214 | 1670.599 | 1665.631 | 1600.906 | 1553.214 | 668.336 | 580.433 | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | █▃▂▁▂ | 93.109 | 74.981 | 69.979 | 65.533 | 67.935 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:Goodwill | ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██ | 120.279 | 120.279 | 120.279 | 120.279 | 120.279 | 120.279 | 120.279 | 120.279 | 120.279 | 120.279 | 120.279 | 120.279 | 120.3 | 120.279 | 120.279 | 120.655 | 120.655 | NA | NA |
| us-gaap:FiniteLivedIntangibleAssetsNet | ▁█ | 4.864 | 5.352 | NA | 6.18 | 6.84 | 7.777 | 8.986 | 10.653 | 12.686 | 13.437 | 13.142 | NA | NA | NA | NA | 24.518 | 21.978 | NA | NA |
| us-gaap:OperatingLeaseRightOfUseAsset | ▄ | 18.772 | NA | NA | NA | 3.836 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 |
|---|
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:LongTermDebt | ▆▆██▇▇▇█▆▅▅▇▃▁▂ | 2817.412 | 2821.192 | 2954.929 | 2934.66 | 2833.497 | 2837.115 | 2841.057 | 2943.925 | 2803.543 | 2671.703 | 2674.381 | 2824.857 | 2475.887 | 2339.235 | 2434.703 | NA | NA | NA | NA |
| us-gaap:MinorityInterest | ▁▁▁▁▁▁▁▅▆▆▆▆▆██▅▅ | 683.336 | 685.43 | 684.248 | 684.228 | 683.364 | 681.91 | 683.059 | 715.502 | 721.777 | 720.345 | 720.232 | 724.541 | 726.195 | 734.838 | 738.697 | 717.296 | 716.65 | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | ▄ | 2.862 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree | ▄ | 2.533 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour | ▄ | 2.452 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive | ▄ | 2.1 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | ▄ | 9.889 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:StockholdersEquity | ██▇▇▇▇▇▇▇▇▇▇▇▇▆▃▁ | 5789.094 | 5769.009 | 5345.561 | 5340.527 | 5335.426 | 5325.279 | 5312.464 | 5259.87 | 5251.965 | 5268.659 | 5148.53 | 5116.109 | 5149.629 | 5103.589 | 4673.057 | 2771.997 | 1934.686 | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | ██▇▇▇▇▇▇▇▇▇▇▇▇▆▃▁ | 6472.43 | 6454.439 | 6029.809 | 6024.755 | 6018.79 | 6007.189 | 5995.523 | 5975.372 | 5973.742 | 5989.004 | 5868.762 | 5840.65 | 5875.824 | 5838.427 | 5411.754 | 3489.293 | 2651.336 | NA | NA |
| us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA | ██▇▇▇▇▇▇▇▇▇▇▇▆▆▃▁ | 3.16 | 3.156 | 3.005 | 3.003 | 3.001 | 3.0 | 2.998 | 2.966 | 2.96 | 2.959 | 2.954 | 2.844 | 2.861 | 2.736 | 2.585 | 1.848 | 1.294 | NA | NA |
| us-gaap:AdditionalPaidInCapital | ██▇▇▇▇▇▇▇▇▇▇▇▇▆▂▁ | 6223.256 | 6214.149 | 5797.384 | 5792.418 | 5790.775 | 5788.95 | 5784.398 | 5739.162 | 5732.466 | 5750.309 | 5630.321 | 5565.871 | 5600.256 | 5517.978 | 5075.46 | 2809.829 | 1965.413 | NA | NA |
| us-gaap:RetainedEarningsAccumulatedDeficit | ▂▂▁▁▁▁▁▁▁▁▁▁▂▂▂██ | -443.522 | -454.697 | -461.435 | -461.706 | -465.368 | -473.893 | -482.354 | -489.82 | -491.214 | -493.995 | -494.326 | -462.504 | -453.953 | -417.609 | -405.426 | -39.686 | -32.027 | NA | NA |
| us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax | ▅▅▆▆▆▆▆▆▆███▁▁▁ | 5.84 | 6.041 | 6.247 | 6.452 | 6.658 | 6.862 | 7.062 | 7.202 | 7.393 | 9.026 | 9.267 | 9.508 | 0.075 | 0.0 | 0.0 | NA | NA | NA | NA |
| us-gaap:MinorityInterest | ▁▁▁▁▁▁▁▅▆▆▆▆▆██▅▅ | 683.336 | 685.43 | 684.248 | 684.228 | 683.364 | 681.91 | 683.059 | 715.502 | 721.777 | 720.345 | 720.232 | 724.541 | 726.195 | 734.838 | 738.697 | 717.296 | 716.65 | NA | NA |
| us-gaap:StockIssuedDuringPeriodValueNewIssues | NA | 413.5 | NA | NA | NA | NA | NA | NA | 0.0 | 110.978 | NA | NA | NA | NA | 5.177 | 844.783 | NA | NA | NA | |
| us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents us-gaap:CommonClassA,us-gaap:CommonStock | NA | 0.15 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 0.002 | NA | NA | NA | NA | |
| us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital | NA | 413.35 | NA | NA | NA | NA | NA | NA | 0.0 | 110.932 | NA | NA | NA | NA | 5.175 | 844.229 | NA | NA | NA | |
| us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:CommonStock | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:Parent | NA | 413.5 | NA | NA | NA | NA | NA | NA | 0.0 | 110.978 | NA | NA | NA | NA | 5.177 | NA | NA | NA | NA | |
| us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | NA | 2.17 | 2.09 | 1.808 | NA | 1.288 | 1.269 | 0.952 | 0.683 | 0.832 | 0.943 | 0.975 | 1.037 | 1.116 | 1.121 | NA | NA | NA | NA | |
| us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital | NA | 2.17 | 2.09 | 1.808 | NA | 1.288 | 1.269 | 0.952 | 0.683 | 0.832 | 0.943 | 0.975 | 1.037 | 1.116 | 1.121 | NA | NA | NA | NA | |
| us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents us-gaap:Parent | NA | 2.17 | 2.09 | 1.808 | NA | 1.288 | 1.269 | 0.952 | 0.683 | 0.832 | 0.943 | 0.975 | 1.037 | 1.116 | 1.121 | NA | NA | NA | NA | |
| us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | NA | 2.602 | 2.601 | 2.602 | NA | 2.601 | 2.611 | 2.741 | 2.766 | 2.768 | 2.767 | 2.768 | 2.767 | 2.778 | 2.776 | 5.337 | NA | NA | NA | |
| us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest | NA | 2.602 | 2.601 | 2.602 | NA | 2.601 | 2.611 | 2.741 | 2.766 | 2.768 | 2.767 | 2.768 | 2.767 | 2.778 | 2.776 | 5.337 | NA | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▃██▇▃▇▇█▃▇▇▆▃▇▆▁▁▁ | 46.689 | 148.207 | 152.708 | 126.496 | 37.472 | 132.923 | 139.556 | 147.936 | 34.419 | 126.498 | 137.474 | 112.491 | 36.586 | 124.169 | 115.169 | 2.283 | -3.34 | -2.185 | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▇▇▇▇▇██▇▇▇▇▇▆▆▇▄▁ | -205.833 | -114.626 | -143.252 | -179.214 | -152.77 | -54.063 | -39.164 | -130.869 | -192.497 | -156.284 | -103.996 | -221.631 | -350.583 | -264.38 | -152.519 | -503.649 | -917.102 | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | ▄▆▆▅▅██▆▅▅▇▄▁▃▅ | -205.833 | -114.626 | -143.252 | -179.214 | -152.77 | -54.063 | -39.164 | -130.869 | -192.497 | -156.284 | -103.996 | -221.631 | -350.583 | -264.38 | -152.519 | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▄▅▄▄▄▃▃▄▄▄▂▆▅▆▁▆█▄ | -17.806 | 247.201 | -9.94 | 50.328 | -18.593 | -65.76 | -128.229 | 120.466 | 67.128 | 83.436 | -181.119 | 286.472 | 133.699 | 307.483 | -397.66 | 408.025 | 652.438 | 2.185 | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | ▅▇▅▅▅▄▄▆▆▆▃█▆█▁ | -17.806 | 247.201 | -9.94 | 50.328 | -18.593 | -65.76 | -128.229 | 120.466 | 67.128 | 83.436 | -181.119 | 286.472 | 133.699 | 307.483 | -397.66 | NA | NA | NA | NA |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | ▄█▅▅▄▅▅▇▄▆▄▇▃▇▁ | -176.95 | 280.782 | -0.484 | -2.39 | -133.891 | 13.1 | -27.837 | 137.533 | -90.95 | 53.65 | -147.641 | 177.332 | -180.298 | 167.272 | -435.01 | NA | NA | NA | NA |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | ▄█▅▅▄▅▅▇▄▆▄▇▃▇▁ | -176.95 | 280.782 | -0.484 | -2.39 | -133.891 | 13.1 | -27.837 | 137.533 | -90.95 | 53.65 | -147.641 | 177.332 | -180.298 | 167.272 | -435.01 | NA | NA | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AmortizationOfFinancingCosts | ▇▇▇▇▆████████▇▇▁▁ | 1.867 | 1.867 | 1.848 | 1.849 | 1.492 | 1.989 | 2.02 | 1.956 | 1.95 | 1.95 | 1.988 | 1.9 | 1.878 | 1.875 | 1.848 | 0.0 | 0.0 | NA | NA |
| us-gaap:DepreciationDepletionAndAmortization | █████▇█▇▇▇▇▇▇▇▇▃▂▁ | 88.5 | 86.996 | 84.836 | 82.821 | 83.219 | 82.073 | 82.84 | 81.161 | 81.123 | 79.94 | 78.319 | 79.303 | 75.831 | 74.79 | 72.716 | 24.043 | 10.879 | 0.49 | NA |
| us-gaap:IncreaseDecreaseInAccountsReceivable | ▁█▄▄▁▄▄▅▂▇▄▄▃▆▄ | -5.364 | 14.577 | 2.674 | 3.746 | -6.684 | 2.984 | 0.915 | 5.569 | -4.142 | 10.792 | 1.636 | 3.886 | -0.909 | 7.432 | 1.84 | NA | NA | NA | NA |
| us-gaap:IncreaseDecreaseInAccountsReceivable dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | ▁█▄▄▁▄▄▅▂▇▄▄▃▆▄ | -5.364 | 14.577 | 2.674 | 3.746 | -6.684 | 2.984 | 0.915 | 5.569 | -4.142 | 10.792 | 1.636 | 3.886 | -0.909 | 7.432 | 1.84 | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▃██▇▃▇▇█▃▇▇▆▃▇▆▁▁▁ | 46.689 | 148.207 | 152.708 | 126.496 | 37.472 | 132.923 | 139.556 | 147.936 | 34.419 | 126.498 | 137.474 | 112.491 | 36.586 | 124.169 | 115.169 | 2.283 | -3.34 | -2.185 | NA |
| us-gaap:ProfitLoss | █▇▆▇▇▇▇▆▆▆▅▅▆▄▄▁▂▁▁ | 45.342 | 40.153 | 31.807 | 37.527 | 41.464 | 41.401 | 40.304 | 33.091 | 34.734 | 30.281 | 25.898 | 21.525 | 30.533 | 19.097 | 15.066 | -3.861 | 1.123 | -2.675 | -1.566 |
| us-gaap:ShareBasedCompensation | █▅▅▄▃▃▃▃▂▂▃▃▃▃▃▁▁ | 3.766 | 2.17 | 2.09 | 1.808 | 1.299 | 1.288 | 1.269 | 0.952 | 0.683 | 0.832 | 0.943 | 0.975 | 1.037 | 1.116 | 1.121 | 0.153 | 0.279 | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▇▇▇▇▇██▇▇▇▇▇▆▆▇▄▁ | -205.833 | -114.626 | -143.252 | -179.214 | -152.77 | -54.063 | -39.164 | -130.869 | -192.497 | -156.284 | -103.996 | -221.631 | -350.583 | -264.38 | -152.519 | -503.649 | -917.102 | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | ▄▆▆▅▅██▆▅▅▇▄▁▃▅ | -205.833 | -114.626 | -143.252 | -179.214 | -152.77 | -54.063 | -39.164 | -130.869 | -192.497 | -156.284 | -103.996 | -221.631 | -350.583 | -264.38 | -152.519 | NA | NA | NA | NA |
| us-gaap:PaymentsToAcquireRealEstate us-gaap:SubsequentEventType us-gaap:SubsequentEvent | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▄▅▄▄▄▃▃▄▄▄▂▆▅▆▁▆█▄ | -17.806 | 247.201 | -9.94 | 50.328 | -18.593 | -65.76 | -128.229 | 120.466 | 67.128 | 83.436 | -181.119 | 286.472 | 133.699 | 307.483 | -397.66 | 408.025 | 652.438 | 2.185 | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity amh:AmericanHomes4RentLimitedPartnership | ▅▇▅▅▅▄▄▆▆▆▃█▆█▁ | -17.806 | 247.201 | -9.94 | 50.328 | -18.593 | -65.76 | -128.229 | 120.466 | 67.128 | 83.436 | -181.119 | 286.472 | 133.699 | 307.483 | -397.66 | NA | NA | NA | NA |
| us-gaap:PaymentsOfDividendsCommonStock | ▁▅▅█▁█▄▄▄▄▄▄▁▄▄ | 0.032 | 15.814 | 15.107 | 30.114 | 0.0 | 30.111 | 14.889 | 14.832 | 14.846 | 14.822 | 14.365 | 14.337 | 0.011 | 13.718 | 12.958 | NA | NA | NA | NA |
| 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 |
|---|
| 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 | 3222000.0 | 3166000.0 | 3160000.0 | 3156000.0 | 3005000.0 | 3003000.0 | 3001000.0 | 3000000.0 | 2998000.0 | 2966000.0 | 2960000.0 | 2959000.0 | 2954000.0 | 2844000.0 | 2861000.0 | 2736000.0 | 2585000.0 | 2583000.0 | 2427000.0 | 2378000.0 | 2377000.0 | 2389000.0 | 2072000.0 | 2074000.0 | 2108000.0 | 2108000.0 | 2108000.0 | 2108000.0 | 1848000.0 | 1848000.0 | 1848000.0 | 1848000.0 | 1294000.0 | 387000.0 |
| 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 |
| 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 |
| Percentage of Assets us-gaap:CommonClassA | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 320 | 317 | 308 | 301 | 301 | 301 | 299 | 297 | 296 | 295 | 286 | 289 | 258 | 244 | 238 | 238 | 219 |
| 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 |
| 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 | 2017-03-31 | 2016-09-30 |
| Value | 319 | 316 | 308 | 301 | 300 | 300 | 299 | 296 | 296 | 295 | 286 | 266 | 244 | 238 |
| 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 |
| Period End | 2021-03-31 |
| Value | 0.010071 |
| Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 100.0 |
| Period End | 2021-03-31 |
| Value | 0.010071 |
| Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 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 | 0.06 | 0.1 | 0.09 | 0.07 | 0.05 | 0.07 | 0.08 | 0.08 | 0.08 | 0.05 | 0.06 | 0.05 | -0.05 | 0.02 | -0.08 | 0.01 | 0 | -0.01 | 0.01 | -0.09 | -0.04 | -0.02 |
| 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 | 0.0 | 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 | 0.06 | 0.09 | 0.09 | 0.07 | 0.05 | 0.07 | 0.08 | 0.08 | 0.08 | 0.05 | 0.06 | 0.05 | -0.05 | 0.02 | -0.08 | 0 | 0 | -0.01 | -0.01 | -0.09 | -0.04 | -0.02 |
| 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 | 0.0 | 0.0 | 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 | 3.151 | 8.11 | 3.766 | 2.17 | 2.09 | 1.808 | 1.299 | 1.288 | 1.269 | 0.952 | 0.683 | 0.832 | 0.943 |
| Percentage of AllocatedShareBasedCompensationExpense | 100.0 | 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 | 0.0 | 0.0 | 1.3 | 0.7 | 0.7 | 0.6 | 0.5 | 0.4 | 0.5 | 0.3 | 0.3 | 0.3 | 0.4 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0.729 | 2.769 |
| Percentage of AllocatedShareBasedCompensationExpense | 23.1 | 34.1 |
| Percentage of Revenues | 0.0 | 0.0 |
| Percentage of Revenues amh:AcquisitionAndOtherTransactionCosts | 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 | 2016-03-31 |
| Value | 0.599 | 0.999 | 0.418 | 0.447 | 0.441 | 0.439 | 0.353 | 0.35 | 0.346 | 0.293 | 0.217 | 0.341 | 0.423 | 0.4 | 0.4 | 0.4 |
| Percentage of AllocatedShareBasedCompensationExpense | 19.0 | 12.3 | 11.1 | 20.6 | 21.1 | 24.3 | 27.2 | 27.2 | 27.3 | 30.8 | 31.8 | 41.0 | 44.9 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues | 0.0 | 0.0 | 0.1 | 0.1 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.0 | 0.0 |
| Percentage of Revenues amh:PropertyManagementExpense | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2017-03-31 | 2016-03-31 |
| Value | 1.823 | 4.342 | 1.832 | 1.723 | 1.649 | 1.369 | 0.946 | 0.938 | 0.923 | 0.659 | 0.466 | 0.491 | 0.52 | 0.6 | 0.5 | 0.5 |
| Percentage of AllocatedShareBasedCompensationExpense | 57.9 | 53.5 | 48.6 | 79.4 | 78.9 | 75.7 | 72.8 | 72.8 | 72.7 | 69.2 | 68.2 | 59.0 | 55.1 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues | 0.0 | 0.0 | 0.6 | 0.6 | 0.6 | 0.5 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.0 | 0.0 |
| Percentage of Revenues us-gaap:GeneralAndAdministrativeExpense | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 1.334 | 6.185 | 4.444 | 3.784 | 2.621 | 3.466 | 4.055 | 4.063 | 3.967 | 2.988 | 3.278 | 2.835 | -3.209 | 2.643 | -4.499 | 0.309 | -0.031 | -0.283 | -6.652 | 7.308 | -0.778 | 3.836 | 3.555 | 3.106 | 3.728 | 3.956 | 3.753 | 3.379 | 4.227 | 3.62 | 3.888 | 3.798 | 4.664 |
| Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 1.5 | 1.2 | 0.9 | 1.2 | 1.4 | 1.4 | 1.4 | 1.1 | 1.2 | 1.0 | -1.2 | 1.0 | -1.9 | 0.1 | -0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 25.7 |
| 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 |
| Value | 38 | 57 | 45 | 39 | 31 | 37 | 41 | 41 | 40 | 32 | 34 | 30 | 25 | 30 | 30 | 19 | 15 | 11 | 9.405 | -0.139 | -3.691 | 5.068 | -11.301 | -19.887 | -8.368 | -8.265 | -10.025 | -12.78 | -3.581 | -6.935 | -9.471 | -3.861 | 1.123 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 15.1 | 12.8 | 11.2 | 12.9 | 14.5 | 13.8 | 14.2 | 11.8 | 12.8 | 10.7 | 9.7 | 12.0 | 12.6 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 6.2 |
| 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 |
| Value | 38 | 57 | 45 | 39 | 31 | 37 | 41 | 41 | 40 | 32 | 34 | 30 | 25 | 30 | 30 | 19 | 15 | 11 | 9.405 | -0.139 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 15.1 | 12.8 | 11.2 | 12.9 | 14.5 | 13.8 | 14.2 | 11.8 | 12.8 | 10.7 | 9.7 | 12.0 | 12.6 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 0.0 | 12.8 | 11.2 | 12.9 | 0.0 | 13.8 | 14.2 | 11.8 | 0.0 | 10.7 | 9.7 | 12.0 | 0.0 | 7.7 | 6.4 | 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 |
| Value | 22 | 23 | 22 | 21 | 22 | 23 | 21 | 22 | 21 | 20 | 18 | 18 | 18 | 18 | 17 | 17 | 17 |
| Percentage of CostOfGoodsAndServicesSold | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 7.5 | 7.1 | 7.9 | 8.0 | 7.7 | 7.6 | 7.7 | 7.4 | 6.7 | 6.7 | 7.0 | 7.4 | 7.1 | 7.1 | 7.4 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership us-gaap:ManagementService | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 116 | 118 | 106 | 126 | 110 | 107 | 102 | 119 | 104 | 106 | 99 | 113 | 98 | 100 | 87 | 97 | 85 |
| Percentage of CostOfGoodsAndServicesSold | 520.1 | 500.8 | 474.4 | 574.1 | 496.1 | 461.8 | 471.0 | 527.1 | 483.1 | 515.2 | 549.4 | 602.2 | 531.0 | 531.9 | 506.6 | 561.4 | 492.8 |
| Percentage of Revenues | 0.0 | 0.0 | 35.5 | 40.6 | 39.0 | 37.1 | 36.2 | 40.2 | 37.1 | 38.2 | 36.8 | 40.6 | 37.4 | 39.1 | 36.2 | 39.7 | 36.3 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership us-gaap:RealEstate | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 22 | 23 | 22 | 21 | 22 | 23 | 21 | 22 | 21 | 20 | 18 | 18 | 18 | 18 | 17 | 17 | 17 |
| Percentage of CostOfGoodsAndServicesSold | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 7.5 | 7.1 | 7.9 | 8.0 | 7.7 | 7.6 | 7.7 | 7.4 | 6.7 | 6.7 | 7.0 | 7.4 | 7.1 | 7.1 | 7.4 |
| Percentage of Revenues us-gaap:ManagementService | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 116 | 118 | 106 | 126 | 110 | 107 | 102 | 119 | 104 | 106 | 99 | 113 | 98 | 100 | 87 | 97 | 85 |
| Percentage of CostOfGoodsAndServicesSold | 520.1 | 500.8 | 474.4 | 574.1 | 496.1 | 461.8 | 471.0 | 527.1 | 483.1 | 515.2 | 549.4 | 602.2 | 531.0 | 531.9 | 506.6 | 561.4 | 492.8 |
| Percentage of Revenues | 0.0 | 0.0 | 35.5 | 40.6 | 39.0 | 37.1 | 36.2 | 40.2 | 37.1 | 38.2 | 36.8 | 40.6 | 37.4 | 39.1 | 36.2 | 39.7 | 36.3 |
| Percentage of Revenues us-gaap:RealEstate | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 12 | 15 | 13 | 12 | 11 | 11 | 12 | 11 | 10 | 9.435 | 8.402 | 9.265 | 9.677 | 9.231 | 7.986 | 8.525 | 8.926 | 9.295 | 8.026 | 7.563 | 7.346 | 8.057 | 6.409 | 6.09 | 6.276 | 6.131 | 5.879 | 5.291 | 5.703 | 5.074 | 3.667 | 2.742 | 0.811 | 1.625 | 3.251 | 2.291 | 1.487 |
| Percentage of GeneralAndAdministrativeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 4.4 | 4.0 | 4.1 | 3.9 | 4.3 | 3.7 | 3.7 | 3.4 | 3.1 | 3.3 | 3.7 | 3.6 | 3.3 | 3.5 | 3.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 4.5 | 0.0 | 0.0 | 233.1 | 808.2 |
| 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 |
| Value | 12 | 15 | 13 | 12 | 11 | 11 | 12 | 11 | 10 | 9.435 | 8.402 | 9.265 | 9.677 | 9.231 | 7.986 | 8.525 | 8.926 | 9.295 | 8.524 | 8.043 |
| Percentage of GeneralAndAdministrativeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 106.2 | 106.3 |
| Percentage of Revenues | 0.0 | 0.0 | 4.4 | 4.0 | 4.1 | 3.9 | 4.3 | 3.7 | 3.7 | 3.4 | 3.1 | 3.3 | 3.7 | 3.6 | 3.3 | 3.5 | 3.8 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 0.0 | 4.0 | 4.1 | 3.9 | 0.0 | 3.7 | 3.7 | 3.4 | 0.0 | 3.3 | 3.7 | 3.6 | 0.0 | 3.5 | 3.8 | 0.0 | 0.0 | 0.0 |
| 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 |
| Value | 51 | 48 | 40 | 31 | 37 | 41 | 41 | 40 | 33 | 34 | 30 | 25 | 21 | 30 | 19 | 15 | 11 | 9.338 | -0.167 | -3.753 | 5.028 |
| Percentage of IncomeLossFromContinuingOperations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 12.9 | 11.2 | 13.0 | 14.6 | 13.9 | 14.3 | 11.9 | 12.8 | 10.8 | 9.8 | 8.3 | 12.6 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 12.9 | 11.2 | 13.0 | 0.0 | 13.9 | 14.3 | 11.9 | 0.0 | 10.8 | 9.8 | 8.3 | 0.0 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 |
| Value | 35 | 30 | 22 | 15 | 20 | 23 | 22 | 16 | 17 | 15 | 17 | 5.814 | 20 |
| Percentage of IncomeLossFromContinuingOperations | 69.4 | 61.8 | 56.2 | 48.3 | 53.9 | 56.8 | 55.9 | 49.2 | 50.8 | 50.1 | 65.9 | 27.0 | 66.9 |
| Percentage of Revenues | 0.0 | 0.0 | 7.3 | 5.4 | 7.0 | 7.9 | 8.0 | 5.8 | 6.5 | 5.4 | 6.5 | 2.3 | 8.4 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership us-gaap:CommonStock us-gaap:GeneralPartner | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 3.218 | 4.925 | 3.819 | 2.656 | 3.501 | 4.099 | 4.004 | 3.026 | 3.32 | 2.881 | -2.902 | 1.125 | -4.618 |
| Percentage of IncomeLossFromContinuingOperations | 6.2 | 10.1 | 9.5 | 8.4 | 9.3 | 9.9 | 9.9 | 9.1 | 9.6 | 9.5 | -11.2 | 5.2 | -15.1 |
| Percentage of Revenues | 0.0 | 0.0 | 1.2 | 0.9 | 1.2 | 1.4 | 1.4 | 1.1 | 1.2 | 1.0 | -1.1 | 0.4 | -1.9 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership us-gaap:CommonStock us-gaap:LimitedPartner | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 14 | 14 |
| Percentage of IncomeLossFromContinuingOperations | 24.3 | 28.2 | 34.3 | 43.3 | 36.7 | 33.3 | 34.2 | 41.6 | 39.7 | 40.4 | 46.3 | 67.8 | 47.8 |
| Percentage of Revenues | 0.0 | 0.0 | 4.4 | 4.9 | 4.8 | 4.6 | 4.9 | 4.9 | 5.1 | 4.4 | 4.5 | 5.7 | 6.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership us-gaap:PreferredStock us-gaap:GeneralPartner | 0.0 | 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 |
| Value | 27 | 28 | 28 | 29 | 29 | 29 | 31 | 31 | 32 | 31 | 30 | 30 | 31 | 29 | 25 | 26 | 28 | 31 | 31 | 32 | 35 | 30 | 27 | 23 | 22 | 15 | 9.379 | 5.112 | 3.888 | 1.502 | 0.0 | 0.0 | 0.0 | 0.37 |
| 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 | 0.0 | 0.0 | 0.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.0 | 9.5 | 9.4 | 10.4 | 10.3 | 11.0 | 10.5 | 11.6 | 11.4 | 11.4 | 11.0 | 12.1 | 11.4 | 10.6 | 10.8 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 27 | 28 | 28 | 29 | 29 | 29 | 31 | 31 | 32 | 31 | 30 | 30 | 31 | 29 | 25 | 26 | 28 | 31 | 31 | 32 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 9.5 | 9.4 | 10.4 | 10.3 | 11.0 | 10.5 | 11.6 | 11.4 | 11.4 | 11.0 | 12.1 | 11.4 | 10.6 | 10.8 | 12.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 0.0 | 9.4 | 10.4 | 10.3 | 0.0 | 10.5 | 11.6 | 11.4 | 0.0 | 11.0 | 12.1 | 11.4 | 0.0 | 10.8 | 12.0 | 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 |
| Value | 15 | 36 | 16 | 37 | 17 | 37 | 19 | 40 | 20 | 32 | 24 | 33 | 24 | 22 | 22 | 23 | 25 | 28 | 28 | 28 | 31 | 27 |
| Percentage of InterestPaidNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 5.5 | 12.2 | 6.1 | 13.1 | 6.7 | 13.7 | 7.4 | 11.5 | 8.9 | 11.9 | 9.4 | 8.8 | 9.4 | 9.6 | 10.8 | 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 |
| Value | 15 | 36 | 16 | 37 | 17 | 37 | 19 | 40 | 20 | 32 | 24 | 33 | 24 | 22 | 22 | 23 | 25 | 28 | 28 |
| Percentage of InterestPaidNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 5.5 | 12.2 | 6.1 | 13.1 | 6.7 | 13.7 | 7.4 | 11.5 | 8.9 | 11.9 | 9.4 | 8.8 | 9.4 | 9.6 | 10.8 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 0.0 | 12.2 | 6.1 | 13.1 | 0.0 | 13.7 | 7.4 | 11.5 | 0.0 | 11.9 | 9.4 | 8.8 | 0.0 | 9.6 | 10.8 | 0.0 | 0.0 |
| Period End | 2020-11-30 |
| Value | 2900000.0 |
| Percentage of LitigationSettlementExpense | 100.0 |
| Percentage of Revenues | 0.0 |
| Percentage of Revenues amh:FormerEmployee | 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 | 20 | 30 | 27 | 22 | 15 | 20 | 23 | 23 | 22 | 16 | 17 | 15 | -15.151 | 5.814 | -21.994 | 1.535 | -0.186 | -1.49 | 2.391 | -21.152 | -10.404 | -4.377 | -20.474 | -28.616 | -17.697 | -17.79 | -19.312 | -21.747 | -12.25 | -13.676 | -14.519 | -7.659 | -13.997 | -7.752 | -5.831 | -2.675 | -1.566 | -0.164 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 9.0 | 7.3 | 5.4 | 7.0 | 8.3 | 7.9 | 8.0 | 5.8 | 6.5 | 5.4 | -5.7 | 2.3 | -9.1 | 0.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -77.2 | 0.0 | 0.0 | -272.1 | -851.1 | 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 |
| Value | 23 | 35 | 31 | 26 | 18 | 23 | 27 | 27 | 26 | 19 | 20 | 18 | -18.053 | 6.939 | -26.612 | 1.875 | -0.217 | -1.829 | -4.133 | -24.525 | -11.02 | -3.627 |
| Percentage of NetIncomeLossAvailableToCommonStockholdersBasic | 116.0 | 116.3 | 116.5 | 116.9 | 117.3 | 117.3 | 117.3 | 117.4 | 117.8 | 118.6 | 118.8 | 119.0 | 119.2 | 119.3 | 121.0 | 122.1 | 116.7 | 122.8 | -172.9 | 115.9 | 105.9 | 82.9 |
| Percentage of Revenues | 0.0 | 0.0 | 10.5 | 8.5 | 6.4 | 8.2 | 9.7 | 9.3 | 9.4 | 6.9 | 7.8 | 6.4 | -6.8 | 2.7 | -11.0 | 0.8 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 0.0 | 8.5 | 6.4 | 8.2 | 0.0 | 9.3 | 9.4 | 6.9 | 0.0 | 6.4 | -6.8 | 2.7 | 0.0 | 0.8 | -0.1 | 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 |
| Value | 273 | 280 | 264 | 283 | 261 | 262 | 253 | 270 | 254 | 251 | 243 | 254 | 240 | 239 | 214 | 238 | 216 | 218 | 216 | 232 | 224 | 201 | 180 | 189 | 164 | 141 | 122 | 125 | 92 | 81 | 70 | 52 | 28 | 13 | 9.108 | 3.658 | 1.75 |
| Percentage of OperatingExpenses | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 88.3 | 91.1 | 92.5 | 90.8 | 89.3 | 90.7 | 90.3 | 90.2 | 89.9 | 91.0 | 90.9 | 93.0 | 88.2 | 96.4 | 91.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 159.6 | 0.0 | 0.0 | 372.1 | 951.1 |
| 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 | 273 | 280 | 264 | 283 | 261 | 262 | 253 | 270 | 254 | 251 | 243 | 254 | 240 | 239 | 214 | 238 | 216 | 218 | 216 | 232 |
| Percentage of OperatingExpenses | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | 88.3 | 91.1 | 92.5 | 90.8 | 89.3 | 90.7 | 90.3 | 90.2 | 89.9 | 91.0 | 90.9 | 93.0 | 88.2 | 96.4 | 91.2 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 0.0 | 91.1 | 92.5 | 90.8 | 0.0 | 90.7 | 90.3 | 90.2 | 0.0 | 91.0 | 90.9 | 93.0 | 0.0 | 96.4 | 91.2 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | -13229000.0 | 9230000.0 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | -13229000.0 | 9230000.0 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -13469000.0 | 8989000.0 | -240000.0 | -241000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.0 | -0.1 | -0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -13469000.0 | 8989000.0 | -240000.0 | -241000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.0 | -0.1 | -0.1 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | -0.1 | -0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -13469000.0 | 8989000.0 | -240000.0 | -241000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.0 | -0.1 | -0.1 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -11585000.0 | 7729000.0 | -205000.0 | -206000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 86.0 | 86.0 | 85.4 | 85.5 |
| Percentage of Revenues | 0.0 | 0.0 | -0.1 | -0.1 |
| Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -1884000.0 | 1260000.0 | -35000.0 | -35000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 14.0 | 14.0 | 14.6 | 14.5 |
| Percentage of Revenues | 0.0 | 0.0 | -0.0 | -0.0 |
| Percentage of Revenues us-gaap:NoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -11585000.0 | 7729000.0 | -205000.0 | -206000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 86.0 | 86.0 | 85.4 | 85.5 |
| Percentage of Revenues | 0.0 | 0.0 | -0.1 | -0.1 |
| Percentage of Revenues us-gaap:Parent | 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 |
| Value | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 14 | 14 | 17 | 15 | 13 | 13 | 13 | 7.412 | 5.569 | 5.569 | 5.569 | 5.569 | 5.569 | 5.569 | 5.569 | 4.669 | 3.121 | 1.16 | 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 | 100.0 | 100.0 | 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 |
| Percentage of Revenues | 0.0 | 0.0 | 4.6 | 4.4 | 4.9 | 4.8 | 4.9 | 4.6 | 4.9 | 4.9 | 5.1 | 4.4 | 4.5 | 5.7 | 6.0 | 7.0 | 6.4 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 14 | 14 | 17 | 15 | 13 | 13 | 13 |
| 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 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.0 | 4.6 | 4.4 | 4.9 | 4.8 | 4.9 | 4.6 | 4.9 | 4.9 | 5.1 | 4.4 | 4.5 | 5.7 | 6.0 | 7.0 | 6.4 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 0.0 | 4.4 | 4.9 | 4.8 | 0.0 | 4.6 | 4.9 | 4.9 | 0.0 | 4.4 | 4.5 | 5.7 | 0.0 | 7.0 | 6.4 | 0.0 | 0.0 | 0.0 |
| 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 |
| Value | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 14 | 14 | 17 | 15 | 13 | 13 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 4.4 | 4.9 | 4.8 | 4.6 | 4.9 | 4.9 | 5.1 | 4.4 | 4.5 | 5.7 | 6.0 | 7.0 | 6.4 | 0.0 | 0.0 |
| Percentage of Revenues us-gaap:Parent | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 14 | 14 | 17 | 15 | 13 | 13 | 13 | 7.412 | 5.569 | 5.569 | 5.569 | 5.569 | 5.569 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.0 | 4.4 | 4.9 | 4.8 | 4.6 | 4.9 | 4.9 | 5.1 | 4.4 | 4.5 | 5.7 | 6.0 | 7.0 | 6.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 |
| 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 | 51 | 48 | 45 | 40 | 31 | 37 | 41 | 41 | 40 | 33 | 34 | 30 | 25 | 21 | 30 | 19 | 15 | 11 | 9.338 | -0.167 | -3.753 | 5.028 | -11.347 | -19.938 | -8.398 | -8.265 | -9.992 | -12.796 | -3.369 | -6.935 | -9.471 | -3.861 | 1.123 | -6.857 | -5.831 | -2.675 | -1.566 | -0.164 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 15.1 | 12.9 | 11.2 | 13.0 | 14.6 | 13.9 | 14.3 | 11.9 | 12.8 | 10.8 | 9.8 | 8.3 | 12.6 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 6.2 | 0.0 | 0.0 | -272.1 | -851.1 | 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 |
| Value | 51 | 48 | 45 | 40 | 31 | 37 | 41 | 41 | 40 | 33 | 34 | 30 | 25 | 21 | 30 | 19 | 15 | 11 | 9.338 | -0.167 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 15.1 | 12.9 | 11.2 | 13.0 | 14.6 | 13.9 | 14.3 | 11.9 | 12.8 | 10.8 | 9.8 | 8.3 | 12.6 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 0.0 | 12.9 | 11.2 | 13.0 | 0.0 | 13.9 | 14.3 | 11.9 | 0.0 | 10.8 | 9.8 | 8.3 | 0.0 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 |
| 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 |
| Value | 3.218 | 4.925 | 3.819 | 2.656 | 3.501 | 4.099 | 4.004 | 3.026 | 3.32 | 2.881 | -3.15 | 1.114 | -4.485 | 0.309 | -0.03 | -0.301 | -6.64 | 7.316 | -0.761 | 3.836 | 3.558 | 3.109 | 3.73 | 3.956 | 3.751 | 3.382 | 4.212 | 3.62 | 3.888 | 3.798 |
| Percentage of ProfitLoss | 6.2 | 10.1 | 9.5 | 8.4 | 9.3 | 9.9 | 9.9 | 9.1 | 9.6 | 9.5 | -12.2 | 5.2 | -14.7 | 1.6 | -0.2 | -2.6 | -71.1 | -4380.8 | 20.3 | 76.3 | -31.4 | -15.6 | -44.4 | -47.9 | -37.5 | -26.4 | -125.0 | -52.2 | -41.1 | -98.4 |
| Percentage of Revenues | 0.0 | 0.0 | 1.2 | 0.9 | 1.2 | 1.4 | 1.4 | 1.1 | 1.2 | 1.0 | -1.2 | 0.4 | -1.8 | 0.1 | -0.0 | 0.0 | 0.0 | 0.0 | 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 Revenues us-gaap:NoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 48 | 43 | 36 | 29 | 34 | 37 | 36 | 30 | 31 | 27 | 29 | 20 | 35 | 18 | 15 | 12 | 15 |
| Percentage of ProfitLoss | 93.8 | 89.9 | 90.5 | 91.6 | 90.7 | 90.1 | 90.1 | 90.9 | 90.4 | 90.5 | 112.2 | 94.8 | 114.7 | 98.4 | 100.2 | 102.6 | 171.1 |
| Percentage of Revenues | 0.0 | 0.0 | 11.7 | 10.3 | 11.7 | 12.5 | 12.9 | 10.8 | 11.6 | 9.8 | 11.0 | 7.9 | 14.4 | 7.6 | 6.4 | 0.0 | 0.0 |
| Percentage of Revenues us-gaap:Parent | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 48 | 43 | 36 | 29 | 34 | 37 | 36 | 30 | 31 | 27 | 29 | 20 | 35 | 18 | 15 | 12 | 15 | -7.483 | -2.992 | 1.192 | -14.905 | -23.047 | -12.128 | -12.221 | -13.743 | -16.178 | -7.581 | -10.555 | -13.359 | -7.659 |
| Percentage of ProfitLoss | 93.8 | 89.9 | 90.5 | 91.6 | 90.7 | 90.1 | 90.1 | 90.9 | 90.4 | 90.5 | 112.2 | 94.8 | 114.7 | 98.4 | 100.2 | 102.6 | 171.1 | 4480.8 | 79.7 | 23.7 | 131.4 | 115.6 | 144.4 | 147.9 | 137.5 | 126.4 | 225.0 | 152.2 | 141.1 | 198.4 |
| Percentage of Revenues | 0.0 | 0.0 | 11.7 | 10.3 | 11.7 | 12.5 | 12.9 | 10.8 | 11.6 | 9.8 | 11.0 | 7.9 | 14.4 | 7.6 | 6.4 | 0.0 | 0.0 | 0.0 | 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 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 |
| 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 |
| Value | 2500000.0 | 2100000.0 | 1900000.0 | 1700000.0 | 1300000.0 | 900000.0 | 1200000.0 | 1000000.0 | 700000.0 | 700000.0 | 1200000.0 | 300000.0 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 0.6 | 0.5 | 0.5 | 0.3 | 0.4 | 0.3 | 0.2 | 0.3 | 0.4 | 0.1 |
| Percentage of Revenues us-gaap:ManagementService us-gaap:CorporateJointVenture | 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 | 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 | 2013-09-30 | 2013-06-30 | 2012-09-30 | 2012-06-30 |
| Value | 299 | 310 | 283 | 289 | 284 | 298 | 281 | 279 | 270 | 280 | 264 | 258 | 242 | 246 | 237 | 49 | 18 | 0.983 | 0.184 |
| 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 |
| 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 |
| 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 |
| Value | 299 | 310 | 283 | 289 | 284 | 298 | 281 | 279 | 270 | 280 | 264 | 258 | 242 | 246 | 237 |
| 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 |
| 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 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 100.0 | 100.0 | 100.0 | 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 | 2012-12-31 |
| Value | 9968 | 9686 | 9593 | 9600 | 9271 | 9201 | 9100 | 9140 | 9142 | 9191 | 9001 | 8971 | 8830 | 8958 | 8608 | 8509 | 8146 | 8490 | 8107 | 8086 | 8252 | 8097 | 6807 | 6965 | 6686 | 6576 | 6227 | 5536 | 4982 | 4524 | 4224 | 3885 | 3482 | 921 |
| 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 |
| 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 |
| 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 | 2016-12-31 |
| Value | 9968 | 9686 | 9593 | 9600 | 9271 | 9201 | 9100 | 9140 | 9142 | 9191 | 9001 | 8971 | 8830 | 8958 | 8608 | 8509 | 8107 |
| 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 |
| 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 |
| Percentage of Assets amh:AmericanHomes4RentLimitedPartnership | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2012-12-31 |
| Value | 3795 | 3200 | 3121 | 3145 | 3241 | 3176 | 3081 | 3132 | 3147 | 3215 | 3027 | 2982 | 2961 | 3117 | 2732 | 2671 | 2734 | 3219 | 3169 | 3233 | 3373 | 3657 | 2872 | 2950 | 2577 | 2436 | 2057 | 1349 | 1216 | 889 | 573 | 395 | 831 | 16 |
| Percentage of Liabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 38.1 | 33.0 | 32.5 | 32.8 | 35.0 | 34.5 | 33.9 | 34.3 | 34.4 | 35.0 | 33.6 | 33.2 | 33.5 | 34.8 | 31.7 | 31.4 | 33.6 | 37.9 | 39.1 | 40.0 | 40.9 | 45.2 | 42.2 | 42.4 | 38.5 | 37.1 | 33.0 | 24.4 | 24.4 | 19.7 | 13.6 | 10.2 | 23.9 | 1.8 |
| 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 | 2016-12-31 |
| Value | 3795 | 3200 | 3121 | 3145 | 3241 | 3176 | 3081 | 3132 | 3147 | 3215 | 3027 | 2982 | 2961 | 3117 | 2732 | 2671 | 3169 |
| Percentage of Liabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 38.1 | 33.0 | 32.5 | 32.8 | 35.0 | 34.5 | 33.9 | 34.3 | 34.4 | 35.0 | 33.6 | 33.2 | 33.5 | 34.8 | 31.7 | 31.4 | 39.1 |
| Percentage of Assets amh:AmericanHomes4RentLimitedPartnership | 38.1 | 33.0 | 32.5 | 32.8 | 35.0 | 34.5 | 33.9 | 34.3 | 34.4 | 35.0 | 33.6 | 33.2 | 33.5 | 34.8 | 31.7 | 31.4 | 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 | 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 | 9968 | 9686 | 9593 | 9600 | 9271 | 9201 | 9100 | 9140 | 9142 | 9191 | 9001 | 8971 | 8830 | 8958 | 8608 | 8509 | 8146 | 8490 | 8107 | 8086 | 8252 | 8097 | 6807 | 6965 | 6686 | 6576 | 6227 | 5536 | 4982 | 4524 | 4224 | 3885 | 3482 | 921 |
| 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 |
| 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 |
| 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 | 2016-12-31 |
| Value | 9968 | 9686 | 9593 | 9600 | 9271 | 9201 | 9100 | 9140 | 9142 | 9191 | 9001 | 8971 | 8830 | 8958 | 8608 | 8509 | 8107 |
| 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 |
| 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 |
| Percentage of Assets amh:AmericanHomes4RentLimitedPartnership | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2012-12-31 |
| Value | 5497 | 5806 | 5789 | 5769 | 5345 | 5340 | 5335 | 5325 | 5312 | 5259 | 5251 | 5268 | 5148 | 5116 | 5149 | 5103 | 4673 | 4529 | 4192 | 4098 | 4129 | 3686 | 3259 | 3303 | 3394 | 3422 | 3450 | 3476 | 3054 | 2920 | 2934 | 2771 | 1934 | 904 |
| 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 |
| Percentage of Assets | 55.1 | 59.9 | 60.3 | 60.1 | 57.7 | 58.0 | 58.6 | 58.3 | 58.1 | 57.2 | 58.3 | 58.7 | 58.3 | 57.1 | 59.8 | 60.0 | 57.4 | 53.4 | 51.7 | 50.7 | 50.0 | 45.5 | 47.9 | 47.4 | 50.8 | 52.0 | 55.4 | 62.8 | 61.3 | 64.6 | 69.5 | 71.3 | 55.6 | 98.2 |
| 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 |
| Value | 40 | 75 | 137 | 315 | 32 | 33 | 37 | 171 | 119 | 154 | 30 | 110 | 53 | 203 | 46 | 243 | 67 | 495 | 118 | 106 | 270 | 71 | 57 | 238 | 90 | 115 | 108 | 103 | 239 | 103 | 148 | 158 | 251 | 519 | 397 |
| 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 |
| Percentage of Assets | 0.4 | 0.8 | 1.4 | 3.3 | 0.3 | 0.4 | 0.4 | 1.9 | 1.3 | 1.7 | 0.3 | 1.2 | 0.6 | 2.3 | 0.5 | 2.9 | 0.8 | 5.8 | 1.5 | 1.3 | 3.3 | 0.9 | 0.8 | 3.4 | 1.4 | 1.8 | 1.7 | 1.9 | 4.8 | 2.3 | 3.5 | 4.1 | 7.2 | 0.0 | 43.1 |
| 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 | 2016-12-31 |
| Value | 40 | 75 | 137 | 315 | 32 | 33 | 37 | 171 | 119 | 154 | 30 | 110 | 53 | 203 | 46 | 243 | 118 |
| 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 |
| Percentage of Assets | 0.4 | 0.8 | 1.4 | 3.3 | 0.3 | 0.4 | 0.4 | 1.9 | 1.3 | 1.7 | 0.3 | 1.2 | 0.6 | 2.3 | 0.5 | 2.9 | 1.5 |
| Percentage of Assets amh:AmericanHomes4RentLimitedPartnership | 0.4 | 0.8 | 1.4 | 3.3 | 0.3 | 0.4 | 0.4 | 1.9 | 1.3 | 1.7 | 0.3 | 1.2 | 0.6 | 2.3 | 0.5 | 2.9 | 1.5 |
| 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 | 2015-12-31 | 2014-12-31 |
| Value | 183 | 212 | 265 | 442 | 161 | 161 | 164 | 298 | 284 | 312 | 175 | 266 | 212 | 360 | 182 | 363 | 195 | 630 | 250 | 168 | 185 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1.8 | 2.2 | 2.8 | 4.6 | 1.7 | 1.8 | 1.8 | 3.3 | 3.1 | 3.4 | 1.9 | 3.0 | 2.4 | 4.0 | 2.1 | 4.3 | 2.4 | 7.4 | 3.1 | 2.5 | 3.0 |
| 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 | 2015-12-31 | 2014-12-31 |
| Value | 183 | 212 | 265 | 442 | 161 | 161 | 164 | 298 | 284 | 312 | 175 | 266 | 212 | 360 | 182 | 363 | 195 | 630 | 250 | 168 | 185 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1.8 | 2.2 | 2.8 | 4.6 | 1.7 | 1.8 | 1.8 | 3.3 | 3.1 | 3.4 | 1.9 | 3.0 | 2.4 | 4.0 | 2.1 | 4.3 | 2.4 | 7.4 | 3.1 | 2.5 | 3.0 |
| Percentage of Assets amh:AmericanHomes4RentLimitedPartnership | 1.8 | 2.2 | 2.8 | 4.6 | 1.7 | 1.8 | 1.8 | 3.3 | 3.1 | 3.4 | 1.9 | 3.0 | 2.4 | 4.0 | 2.1 | 4.3 | 0.0 | 0.0 | 3.1 | 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 | 2012-12-31 |
| Value | 1911 | 1860 | 1836 | 1813 | 1794 | 1784 | 1756 | 1736 | 1727 | 1729 | 1713 | 1689 | 1670 | 1670 | 1665 | 1600 | 1553 | 1523 | 1512 | 1497 | 1475 | 1474 | 1229 | 1218 | 1192 | 1166 | 1104 | 982 | 847 | 797 | 728 | 668 | 580 | 96 |
| Percentage of Land | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 19.2 | 19.2 | 19.1 | 18.9 | 19.4 | 19.4 | 19.3 | 19.0 | 18.9 | 18.8 | 19.0 | 18.8 | 18.9 | 18.6 | 19.3 | 18.8 | 19.1 | 17.9 | 18.7 | 18.5 | 17.9 | 18.2 | 18.1 | 17.5 | 17.8 | 17.7 | 17.7 | 17.8 | 17.0 | 17.6 | 17.2 | 17.2 | 16.7 | 10.4 |
| 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 | 2016-12-31 |
| Value | 1911 | 1860 | 1836 | 1813 | 1794 | 1784 | 1756 | 1736 | 1727 | 1729 | 1713 | 1689 | 1670 | 1670 | 1665 | 1600 | 1512 |
| Percentage of Land | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 19.2 | 19.2 | 19.1 | 18.9 | 19.4 | 19.4 | 19.3 | 19.0 | 18.9 | 18.8 | 19.0 | 18.8 | 18.9 | 18.6 | 19.3 | 18.8 | 18.7 |
| Percentage of Assets amh:AmericanHomes4RentLimitedPartnership | 19.2 | 19.2 | 19.1 | 18.9 | 19.4 | 19.4 | 19.3 | 19.0 | 18.9 | 18.8 | 19.0 | 18.8 | 18.9 | 18.6 | 19.3 | 18.8 | 18.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 103 | 100 | 93 | 74 | 69 | 65 | 67 |
| Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.0 | 1.0 | 1.0 | 0.8 | 0.8 | 0.7 | 0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2016-12-31 |
| Value | 103 | 100 | 93 | 74 | 69 | 67 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets | 1.0 | 1.0 | 1.0 | 0.8 | 0.8 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets amh:AmericanHomes4RentLimitedPartnership | 1.0 | 1.0 | 1.0 | 0.8 | 0.8 | 0.7 | 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 |
| Value | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1.2 | 1.2 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.4 | 1.3 | 1.4 | 1.4 | 1.5 | 1.4 | 1.5 | 1.5 | 1.5 | 1.5 | 1.8 | 1.7 | 1.8 | 1.8 | 1.9 | 2.2 | 2.4 | 2.7 | 2.9 | 3.1 | 3.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2013-12-31 | 2013-09-30 | 2013-06-30 |
| Value | 14 | 4.317 | 4.864 | 5.352 | 6.18 | 6.84 | 7.777 | 8.986 | 10 | 12 | 13 | 13 | 20 | 24 | 21 |
| Percentage of FiniteLivedIntangibleAssetsNet | 100.0 | 100.0 | 100.0 | 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 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.5 | 0.6 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 17 | 18 | 18 | 3.836 |
| Percentage of OperatingLeaseRightOfUseAsset | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.2 | 0.2 | 0.2 | 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 | 2013-12-31 |
| Value | 3428 | 2892 | 2817 | 2821 | 2954 | 2934 | 2833 | 2837 | 2841 | 2943 | 2803 | 2671 | 2674 | 2824 | 2475 | 2339 | 2434 | 2944 | 2922 | 2926 | 3094 | 3393 | 2580 | 2587 | 2291 | 2164 | 1778 | 375 |
| 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 |
| Percentage of Assets | 34.4 | 29.9 | 29.4 | 29.4 | 31.9 | 31.9 | 31.1 | 31.0 | 31.1 | 32.0 | 31.1 | 29.8 | 30.3 | 31.5 | 28.8 | 27.5 | 29.9 | 34.7 | 36.0 | 36.2 | 37.5 | 41.9 | 37.9 | 37.1 | 34.3 | 32.9 | 28.6 | 8.9 |
| 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 | 2012-12-31 |
| Value | 675 | 679 | 683 | 685 | 684 | 684 | 683 | 681 | 683 | 715 | 721 | 720 | 720 | 724 | 726 | 734 | 738 | 741 | 744 | 754 | 749 | 753 | 675 | 712 | 715 | 717 | 719 | 710 | 711 | 713 | 715 | 717 | 716 | 0.49 |
| Percentage of MinorityInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 6.8 | 7.0 | 7.1 | 7.1 | 7.4 | 7.4 | 7.5 | 7.5 | 7.5 | 7.8 | 8.0 | 8.0 | 8.2 | 8.1 | 8.4 | 8.6 | 9.1 | 8.7 | 9.2 | 9.3 | 9.1 | 9.3 | 9.9 | 10.2 | 10.7 | 10.9 | 11.6 | 12.8 | 14.3 | 15.8 | 16.9 | 18.5 | 20.6 | 0.1 |
| Period End | 2020-12-31 |
| Value | 2862000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | 100.0 |
| Percentage of Assets | 0.0 |
| Period End | 2020-12-31 |
| Value | 2533000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree | 100.0 |
| Percentage of Assets | 0.0 |
| Period End | 2020-12-31 |
| Value | 2452000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour | 100.0 |
| Percentage of Assets | 0.0 |
| Period End | 2020-12-31 |
| Value | 2100000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive | 100.0 |
| Percentage of Assets | 0.0 |
| Period End | 2020-12-31 |
| Value | 9889000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | 100.0 |
| Percentage of Assets | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 19 | 19 | 19 | 3.916 |
| Percentage of OperatingLeaseLiability | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.2 | 0.2 | 0.2 | 0.0 |
| Period End | 2020-12-31 |
| Value | 21 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 100.0 |
| Percentage of Assets | 0.2 |
| Period End | 2020-12-31 |
| Value | 2774000.0 |
| Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount | 100.0 |
| Percentage of Assets | 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 | 2012-12-31 |
| Value | 5497 | 5806 | 5789 | 5769 | 5345 | 5340 | 5335 | 5325 | 5312 | 5259 | 5251 | 5268 | 5148 | 5116 | 5149 | 5103 | 4673 | 4529 | 4192 | 4098 | 4129 | 3686 | 3259 | 3303 | 3394 | 3422 | 3450 | 3476 | 3054 | 2920 | 2934 | 2771 | 1934 | 904 |
| 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 |
| Percentage of Assets | 55.1 | 59.9 | 60.3 | 60.1 | 57.7 | 58.0 | 58.6 | 58.3 | 58.1 | 57.2 | 58.3 | 58.7 | 58.3 | 57.1 | 59.8 | 60.0 | 57.4 | 53.4 | 51.7 | 50.7 | 50.0 | 45.5 | 47.9 | 47.4 | 50.8 | 52.0 | 55.4 | 62.8 | 61.3 | 64.6 | 69.5 | 71.3 | 55.6 | 98.2 |
| 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 | 2011-12-31 |
| Value | 6173 | 6486 | 6472 | 6454 | 6029 | 6024 | 6018 | 6007 | 5995 | 5975 | 5973 | 5989 | 5868 | 5840 | 5875 | 5838 | 5411 | 5271 | 4937 | 4852 | 4879 | 4440 | 3935 | 4015 | 4109 | 4139 | 4169 | 4186 | 3766 | 3634 | 3650 | 3489 | 2651 | 905 | 3.474 |
| 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 |
| Percentage of Assets | 61.9 | 67.0 | 67.5 | 67.2 | 65.0 | 65.5 | 66.1 | 65.7 | 65.6 | 65.0 | 66.4 | 66.8 | 66.5 | 65.2 | 68.3 | 68.6 | 66.4 | 62.1 | 60.9 | 60.0 | 59.1 | 54.8 | 57.8 | 57.6 | 61.5 | 62.9 | 67.0 | 75.6 | 75.6 | 80.3 | 86.4 | 89.8 | 76.1 | 98.2 | 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 | 2012-12-31 |
| Value | 3.222 | 3.166 | 3.16 | 3.156 | 3.005 | 3.003 | 3.001 | 3.0 | 2.998 | 2.966 | 2.96 | 2.959 | 2.954 | 2.844 | 2.861 | 2.736 | 2.585 | 2.583 | 2.427 | 2.378 | 2.377 | 2.389 | 2.072 | 2.074 | 2.108 | 2.108 | 2.108 | 2.108 | 1.848 | 1.848 | 1.848 | 0.387 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 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 |
| Percentage of Assets us-gaap:CommonClassA 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 |
| 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 | 2012-12-31 |
| Value | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.006 | 0.0 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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:CommonClassB 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 |
| 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 |
| Value | 1.991 | 13 | 5.84 | 6.041 | 6.247 | 6.452 | 6.658 | 6.862 | 7.062 | 7.202 | 7.393 | 9.026 | 9.267 | 9.508 | 0.075 | 0.0 | 0.0 | 0.0 | 0.095 | 0.028 | 0.0 | -0.062 | -0.102 | -0.148 | -0.199 | -0.229 | -0.229 | -0.196 | -0.212 | 0.0 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 0.0 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 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: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 |
| 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 | 2011-12-31 |
| Value | 5949 | 6234 | 6223 | 6214 | 5797 | 5792 | 5790 | 5788 | 5784 | 5739 | 5732 | 5750 | 5630 | 5565 | 5600 | 5517 | 5075 | 4919 | 4568 | 4464 | 4462 | 3997 | 3554 | 3566 | 3619 | 3618 | 3618 | 3614 | 3160 | 3004 | 2996 | 2809 | 1965 | 914 | 3.516 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 96.4 | 96.1 | 96.2 | 96.3 | 96.1 | 96.1 | 96.2 | 96.4 | 96.5 | 96.0 | 96.0 | 96.0 | 95.9 | 95.3 | 95.3 | 94.5 | 93.8 | 93.3 | 92.5 | 92.0 | 91.5 | 90.0 | 90.3 | 88.8 | 88.1 | 87.4 | 86.8 | 86.3 | 83.9 | 82.7 | 82.1 | 80.5 | 74.1 | 101.0 | 101.2 |
| Percentage of Assets | 59.7 | 64.4 | 64.9 | 64.7 | 62.5 | 63.0 | 63.6 | 63.3 | 63.3 | 62.4 | 63.7 | 64.1 | 63.8 | 62.1 | 65.1 | 64.8 | 62.3 | 57.9 | 56.4 | 55.2 | 54.1 | 49.4 | 52.2 | 51.2 | 54.1 | 55.0 | 58.1 | 65.3 | 63.4 | 66.4 | 70.9 | 72.3 | 56.4 | 99.3 | 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 |
| 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 | 675 | 679 | 683 | 685 | 684 | 684 | 683 | 681 | 683 | 715 | 721 | 720 | 720 | 724 | 726 | 734 | 738 | 741 | 744 | 754 | 749 | 753 | 675 | 712 | 715 | 717 | 719 | 710 | 711 | 713 | 715 | 717 | 716 | 0.49 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 10.9 | 10.5 | 10.6 | 10.6 | 11.3 | 11.4 | 11.4 | 11.4 | 11.4 | 12.0 | 12.1 | 12.0 | 12.3 | 12.4 | 12.4 | 12.6 | 13.6 | 14.1 | 15.1 | 15.5 | 15.4 | 17.0 | 17.2 | 17.7 | 17.4 | 17.3 | 17.3 | 17.0 | 18.9 | 19.6 | 19.6 | 20.6 | 27.0 | 0.1 |
| Percentage of Assets | 6.8 | 7.0 | 7.1 | 7.1 | 7.4 | 7.4 | 7.5 | 7.5 | 7.5 | 7.8 | 8.0 | 8.0 | 8.2 | 8.1 | 8.4 | 8.6 | 9.1 | 8.7 | 9.2 | 9.3 | 9.1 | 9.3 | 9.9 | 10.2 | 10.7 | 10.9 | 11.6 | 12.8 | 14.3 | 15.8 | 16.9 | 18.5 | 20.6 | 0.1 |
| Percentage of Assets us-gaap:NoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 5497 | 5806 | 5789 | 5769 | 5345 | 5340 | 5335 | 5325 | 5312 | 5259 | 5251 | 5268 | 5148 | 5116 | 5149 | 5103 | 4673 | 4529 | 4192 | 4098 | 3259 | 3450 | 2934 | 904 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 89.1 | 89.5 | 89.4 | 89.4 | 88.7 | 88.6 | 88.6 | 88.6 | 88.6 | 88.0 | 87.9 | 88.0 | 87.7 | 87.6 | 87.6 | 87.4 | 86.4 | 85.9 | 84.9 | 84.5 | 82.8 | 82.7 | 80.4 | 99.9 |
| Percentage of Assets | 55.1 | 59.9 | 60.3 | 60.1 | 57.7 | 58.0 | 58.6 | 58.3 | 58.1 | 57.2 | 58.3 | 58.7 | 58.3 | 57.1 | 59.8 | 60.0 | 57.4 | 53.4 | 51.7 | 50.7 | 47.9 | 55.4 | 69.5 | 98.2 |
| Percentage of Assets us-gaap:Parent | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2012-12-31 |
| Value | 0.154 | 0.354 | 0.354 | 0.354 | 0.354 | 0.354 | 0.354 | 0.354 | 0.354 | 0.354 | 0.354 | 0.354 | 0.308 | 0.384 | 0.384 | 0.478 | 0.432 | 0.37 | 0.37 | 0.37 | 0.37 | 0.171 | 0.171 | 0.171 | 0.171 | 0.171 | 0.171 | 0.171 | 0.171 | 0.095 | 0.091 | 0.0 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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:PreferredStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2012-12-31 | 2011-12-31 |
| Value | -457.404 | -445.103 | -443.522 | -454.697 | -461.435 | -461.706 | -465.368 | -473.893 | -482.354 | -489.82 | -491.214 | -493.995 | -494.326 | -462.504 | -453.953 | -417.609 | -405.426 | -392.282 | -378.578 | -368.795 | -335.684 | -313.364 | -296.865 | -265.988 | -226.797 | -198.526 | -170.162 | -140.277 | -107.956 | -86.43 | -63.479 | -39.686 | -32.027 | -10.278 | -0.042 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -7.4 | -6.9 | -6.9 | -7.0 | -7.7 | -7.7 | -7.7 | -7.9 | -8.0 | -8.2 | -8.2 | -8.2 | -8.4 | -7.9 | -7.7 | -7.2 | -7.5 | -7.4 | -7.7 | -7.6 | -6.9 | -7.1 | -7.5 | -6.6 | -5.5 | -4.8 | -4.1 | -3.4 | -2.9 | -2.4 | -1.7 | -1.1 | -1.2 | -1.1 | -1.2 |
| Percentage of Assets | -4.6 | -4.6 | -4.6 | -4.7 | -5.0 | -5.0 | -5.1 | -5.2 | -5.3 | -5.3 | -5.5 | -5.5 | -5.6 | -5.2 | -5.3 | -4.9 | -5.0 | -4.6 | -4.7 | -4.6 | -4.1 | -3.9 | -4.4 | -3.8 | -3.4 | -3.0 | -2.7 | -2.5 | -2.2 | -1.9 | -1.5 | -1.0 | -0.9 | -1.1 | 0.0 |
| Percentage of Assets 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 |
| 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 | 3222000.0 | 3166000.0 | 3160000.0 | 3156000.0 | 3005000.0 | 3003000.0 | 3001000.0 | 3000000.0 | 2998000.0 | 2966000.0 | 2960000.0 | 2959000.0 | 2954000.0 | 2844000.0 | 2861000.0 | 2736000.0 | 2585000.0 | 2583000.0 | 2427000.0 | 2378000.0 | 2377000.0 | 2389000.0 | 2072000.0 | 2074000.0 | 2108000.0 | 2108000.0 | 2108000.0 | 2108000.0 | 1848000.0 | 1848000.0 | 1848000.0 | 1848000.0 | 1294000.0 | 387000.0 |
| 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 |
| 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 |
| Percentage of Assets us-gaap:CommonClassA | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2012-12-31 |
| Value | 5949 | 6234 | 6223 | 6214 | 5797 | 5792 | 5790 | 5788 | 5784 | 5739 | 5732 | 5750 | 5630 | 5565 | 5600 | 5517 | 5075 | 4919 | 4568 | 4464 | 4462 | 3997 | 3554 | 3566 | 3619 | 3618 | 3618 | 3614 | 3160 | 3004 | 2996 | 2809 | 1965 | 914 |
| 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 |
| Percentage of Assets | 59.7 | 64.4 | 64.9 | 64.7 | 62.5 | 63.0 | 63.6 | 63.3 | 63.3 | 62.4 | 63.7 | 64.1 | 63.8 | 62.1 | 65.1 | 64.8 | 62.3 | 57.9 | 56.4 | 55.2 | 54.1 | 49.4 | 52.2 | 51.2 | 54.1 | 55.0 | 58.1 | 65.3 | 63.4 | 66.4 | 70.9 | 72.3 | 56.4 | 99.3 |
| 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 | -457400000.0 | -445100000.0 | -443520000.0 | -454700000.0 | -461440000.0 | -461710000.0 | -465370000.0 | -473890000.0 | -482350000.0 | -489820000.0 | -491210000.0 | -494000000.0 | -494330000.0 | -462500000.0 | -453950000.0 | -417610000.0 | -405430000.0 | -392280000.0 | -378580000.0 | -368800000.0 | -335680000.0 | -313360000.0 | -296860000.0 | -265990000.0 | -226800000.0 | -198530000.0 | -170160000.0 | -140280000.0 | -107960000.0 | -86430000.0 | -63479000.0 | -39686000.0 | -32027000.0 | -10278000.0 |
| Percentage of RetainedEarningsAccumulatedDeficit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -4.6 | -4.6 | -4.6 | -4.7 | -5.0 | -5.0 | -5.1 | -5.2 | -5.3 | -5.3 | -5.5 | -5.5 | -5.6 | -5.2 | -5.3 | -4.9 | -5.0 | -4.6 | -4.7 | -4.6 | -4.1 | -3.9 | -4.4 | -3.8 | -3.4 | -3.0 | -2.7 | -2.5 | -2.2 | -1.9 | -1.5 | -1.0 | -0.9 | -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 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 1.991 | 13 | 5.84 | 6.041 | 6.247 | 6.452 | 6.658 | 6.862 | 7.062 | 7.202 | 7.393 | 9.026 | 9.267 | 9.508 | 0.075 | 0.0 | 0.0 | 0.0 | 0.095 | 0.028 | 0.0 | -0.062 | -0.102 | -0.148 | -0.199 | -0.229 | -0.229 | -0.196 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 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 | 2016-12-31 |
| Value | 2.38 | 15 | 6.86 | 7.101 | 7.342 | 7.582 | 7.823 | 8.064 | 8.305 | 8.545 | 8.786 | 9.026 | 9.267 | 9.508 | 0.075 | 0.0 | 0.095 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax | 119.5 | 116.7 | 117.5 | 117.5 | 117.5 | 117.5 | 117.5 | 117.5 | 117.6 | 118.6 | 118.8 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.2 | 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 |
| Percentage of Assets amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.2 | 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 |
| 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 | 675 | 679 | 683 | 685 | 684 | 684 | 683 | 681 | 683 | 715 | 721 | 720 | 720 | 724 | 726 | 734 | 738 | 741 | 744 | 754 | 749 | 753 | 675 | 712 | 715 | 717 | 719 | 710 | 711 | 713 | 715 | 717 | 716 | 0.49 |
| Percentage of MinorityInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 6.8 | 7.0 | 7.1 | 7.1 | 7.4 | 7.4 | 7.5 | 7.5 | 7.5 | 7.8 | 8.0 | 8.0 | 8.2 | 8.1 | 8.4 | 8.6 | 9.1 | 8.7 | 9.2 | 9.3 | 9.1 | 9.3 | 9.9 | 10.2 | 10.7 | 10.9 | 11.6 | 12.8 | 14.3 | 15.8 | 16.9 | 18.5 | 20.6 | 0.1 |
| Period End | 2021-06-30 | 2020-09-30 | 2018-12-31 | 2018-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 |
| Value | 193 | 413 | 0.0 | 110 | 5.177 | 350 | -0.016 | 0.102 | 3.27 | 0.0 | 154 | 7.92 | 0.0 | 844 |
| Percentage of StockIssuedDuringPeriodValueNewIssues | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 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 |
| Period End | 2020-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 0.15 | 0.002 | 0.155 |
| Percentage of StockIssuedDuringPeriodValueNewIssues | 0.0 | 0.0 | 0.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2020-09-30 | 2018-12-31 | 2018-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 |
| Value | 193 | 413 | 0.0 | 110 | 5.175 | 349 | -0.016 | 3.27 | 0.0 | 154 | 7.916 | 0.0 | 844 |
| Percentage of StockIssuedDuringPeriodValueNewIssues | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 99.9 | 0.0 | 99.9 |
| 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: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 |
| Value | 0.055 |
| Percentage of StockIssuedDuringPeriodValueNewIssues | 0.0 |
| Percentage of Assets | 0.0 |
| Percentage of Assets us-gaap:CommonStock | 0.0 |
| Period End | 2021-06-30 | 2020-09-30 | 2018-12-31 | 2018-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 |
| Value | 193 | 413 | 0.0 | 110 | 5.177 | 350 | -0.016 |
| Percentage of StockIssuedDuringPeriodValueNewIssues | 100.0 | 100.0 | 0.0 | 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 |
| Percentage of Assets us-gaap:Parent | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 2013-03-31 |
| Value | 3151000.0 | 8110000.0 | 2170000.0 | 2090000.0 | 1808000.0 | 1288000.0 | 1269000.0 | 952000.0 | 683000.0 | 832000.0 | 943000.0 | 975000.0 | 1037000.0 | 1116000.0 | 1121000.0 | 938000.0 | 892000.0 | 891000.0 | 983000.0 | 870000.0 | 782000.0 | 913000.0 | 734000.0 | 696000.0 | 691000.0 | 751000.0 | 612000.0 | 532000.0 | 174000.0 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 |
| Value | 3151000.0 | 8110000.0 | 2170000.0 | 2090000.0 | 1808000.0 | 1288000.0 | 1269000.0 | 952000.0 | 683000.0 | 832000.0 | 943000.0 | 975000.0 | 1037000.0 | 1116000.0 | 1121000.0 | 938000.0 | 892000.0 | 891000.0 | 983000.0 | 870000.0 | 782000.0 | 913000.0 | 734000.0 | 696000.0 | 691000.0 | 751000.0 | 612000.0 | 532000.0 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 |
| 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 |
| Value | 3151000.0 | 8110000.0 | 2170000.0 | 2090000.0 | 1808000.0 | 1288000.0 | 1269000.0 | 952000.0 | 683000.0 | 832000.0 | 943000.0 | 975000.0 | 1037000.0 | 1116000.0 | 1121000.0 | 938000.0 | 892000.0 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Percentage of Assets us-gaap:Parent | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 5.138 | 5.172 | 2.602 | 2.601 | 2.602 | 2.601 | 2.611 | 2.741 | 2.766 | 2.768 | 2.767 | 2.768 | 2.767 | 2.778 | 2.776 | 2.779 | 2.778 | 2.677 | 2.914 | 2.991 | 5.42 | 6.055 | 6.054 | 6.054 | 6.054 | 6.022 | 6.021 | 5.784 | 6.021 | 5.337 |
| Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 |
| Value | 5.138 | 5.172 | 2.602 | 2.601 | 2.602 | 2.601 | 2.611 | 2.741 | 2.766 | 2.768 | 2.767 | 2.768 | 2.767 | 2.778 | 2.776 | 2.779 | 2.778 | 2.677 | 2.914 | 2.991 | 5.42 | 6.055 | 6.054 | 6.054 | 6.054 | 6.022 | 6.021 | 5.784 | 6.021 | 5.337 |
| Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Percentage of Assets us-gaap:NoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 179 | 151 | 46 | 148 | 152 | 126 | 37 | 132 | 139 | 147 | 34 | 126 | 137 | 112 | 36 | 124 | 115 | 110 | 35 | 93 | 93 | 55 | 45 | 52 | 74 | 28 | 28 | 42 | 41 | 47 | 11 | 2.283 | -3.34 | 5.379 | -2.736 | -2.185 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 15.6 | 47.7 | 53.9 | 43.7 | 13.2 | 44.6 | 49.5 | 53.0 | 12.7 | 45.2 | 52.0 | 43.6 | 15.1 | 50.3 | 48.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -18.4 | 0.0 | 0.0 | -222.3 |
| 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 | 179 | 151 | 46 | 148 | 152 | 126 | 37 | 132 | 139 | 147 | 34 | 126 | 137 | 112 | 36 | 124 | 115 | 110 | 23 |
| 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 | 66.5 |
| Percentage of Revenues | 0.0 | 0.0 | 15.6 | 47.7 | 53.9 | 43.7 | 13.2 | 44.6 | 49.5 | 53.0 | 12.7 | 45.2 | 52.0 | 43.6 | 15.1 | 50.3 | 48.6 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 15.6 | 47.7 | 53.9 | 43.7 | 13.2 | 44.6 | 49.5 | 53.0 | 12.7 | 45.2 | 52.0 | 43.6 | 15.1 | 50.3 | 48.6 | 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 |
| Value | -376.928 | -208.23 | -205.833 | -114.626 | -143.252 | -179.214 | -152.77 | -54.063 | -39.164 | -130.869 | -192.497 | -156.284 | -103.996 | -221.631 | -350.583 | -264.38 | -152.519 | -69.997 | -70.363 | -41.847 | -33.868 | -376.32 | -141.016 | -166.394 | -204.36 | -373.172 | -639.388 | -538.407 | -343.883 | -379.074 | -362.275 | -503.649 | -917.102 | -586.345 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | -68.8 | -36.9 | -50.6 | -61.9 | -53.8 | -18.1 | -13.9 | -46.9 | -71.2 | -55.8 | -39.3 | -85.9 | -144.4 | -107.1 | -64.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -5061.3 | 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 |
| Value | -376.928 | -208.23 | -205.833 | -114.626 | -143.252 | -179.214 | -152.77 | -54.063 | -39.164 | -130.869 | -192.497 | -156.284 | -103.996 | -221.631 | -350.583 | -264.38 | -152.519 | -69.997 | -78.389 |
| 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 | 111.4 |
| Percentage of Revenues | 0.0 | 0.0 | -68.8 | -36.9 | -50.6 | -61.9 | -53.8 | -18.1 | -13.9 | -46.9 | -71.2 | -55.8 | -39.3 | -85.9 | -144.4 | -107.1 | -64.4 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | -68.8 | -36.9 | -50.6 | -61.9 | -53.8 | -18.1 | -13.9 | -46.9 | -71.2 | -55.8 | -39.3 | -85.9 | -144.4 | -107.1 | -64.4 | 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 |
| Value | 168 | 3.26 | -17.806 | 247 | -9.94 | 50 | -18.593 | -65.76 | -128.229 | 120 | 67 | 83 | -181.119 | 286 | 133 | 307 | -397.66 | 340 | 67 | -215.752 | 138 | 334 | -85.131 | 262 | 104 | 351 | 615 | 360 | 438 | 286 | 341 | 408 | 652 | 703 | 497 | 2.185 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | -5.9 | 79.5 | -3.5 | 17.4 | -6.5 | -22.0 | -45.5 | 43.1 | 24.8 | 29.8 | -68.5 | 111.0 | 55.1 | 124.6 | -167.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 3600.7 | 0.0 | 0.0 | 222.3 |
| 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 | 168 | 3.26 | -17.806 | 247 | -9.94 | 50 | -18.593 | -65.76 | -128.229 | 120 | 67 | 83 | -181.119 | 286 | 133 | 307 | -397.66 | 340 | 67 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | -5.9 | 79.5 | -3.5 | 17.4 | -6.5 | -22.0 | -45.5 | 43.1 | 24.8 | 29.8 | -68.5 | 111.0 | 55.1 | 124.6 | -167.8 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | -5.9 | 79.5 | -3.5 | 17.4 | -6.5 | -22.0 | -45.5 | 43.1 | 24.8 | 29.8 | -68.5 | 111.0 | 55.1 | 124.6 | -167.8 | 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 |
| Value | -28.568 | -52.973 | -176.95 | 280 | -0.484 | -2.39 | -133.891 | 13 | -27.837 | 137 | -90.95 | 53 | -147.641 | 177 | -180.298 | 167 | -435.01 | 380 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | -59.1 | 90.3 | -0.2 | -0.8 | -47.1 | 4.4 | -9.9 | 49.3 | -33.6 | 19.2 | -55.8 | 68.7 | -74.3 | 67.8 | -183.5 | 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 | -28.568 | -52.973 | -176.95 | 280 | -0.484 | -2.39 | -133.891 | 13 | -27.837 | 137 | -90.95 | 53 | -147.641 | 177 | -180.298 | 167 | -435.01 | 380 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 0.0 | -59.1 | 90.3 | -0.2 | -0.8 | -47.1 | 4.4 | -9.9 | 49.3 | -33.6 | 19.2 | -55.8 | 68.7 | -74.3 | 67.8 | -183.5 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | -59.1 | 90.3 | -0.2 | -0.8 | -47.1 | 4.4 | -9.9 | 49.3 | -33.6 | 19.2 | -55.8 | 68.7 | -74.3 | 67.8 | -183.5 | 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 |
| Value | 1.999 | 1.829 | 1.867 | 1.867 | 1.848 | 1.849 | 1.492 | 1.989 | 2.02 | 1.956 | 1.95 | 1.95 | 1.988 | 1.9 | 1.878 | 1.875 | 1.848 | 2.562 | 2.563 | 2.633 | 2.441 | 2.838 | 2.536 | 2.269 | 2.123 | 1.377 | 0.848 | 0.473 | 0.283 | 0.163 | 0.0 | 0.0 | 0.0 | 0.186 |
| Percentage of AmortizationOfFinancingCosts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 1.999 | 1.829 | 1.867 | 1.867 | 1.848 | 1.849 | 1.492 | 1.989 | 2.02 | 1.956 | 1.95 | 1.95 | 1.988 | 1.9 | 1.878 | 1.875 | 1.848 | 2.562 | 2.563 |
| Percentage of AmortizationOfFinancingCosts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 1.5 | 1.5 | 1.4 | 1.5 | 1.5 | 1.5 | 1.4 | 1.5 | 1.5 | 1.5 | 1.4 | 1.5 | 1.5 | 1.4 | 1.4 | 1.4 | 1.4 | 2.2 |
| Percentage of AmortizationOfFinancingCosts | 75.0 | 82.0 | 75.0 | 80.3 | 81.2 | 81.1 | 93.8 | 75.4 | 74.3 | 76.7 | 71.8 | 76.9 | 75.5 | 73.7 | 74.5 | 74.7 | 75.8 | 85.9 |
| 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 |
| Value | 91 | 90 | 88 | 86 | 84 | 82 | 83 | 82 | 82 | 81 | 81 | 79 | 78 | 79 | 75 | 74 | 72 | 73 | 74 | 75 | 79 | 69 | 62 | 67 | 59 | 53 | 47 | 44 | 38 | 35 | 33 | 24 | 10 | 2.905 | 1.519 | 0.49 |
| 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 |
| 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 | 91 | 90 | 88 | 86 | 84 | 82 | 83 | 82 | 82 | 81 | 81 | 79 | 78 | 79 | 75 | 74 | 72 | 73 | 74 |
| 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 |
| 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 | 1.202 | 8.17 | -5.364 | 14 | 2.674 | 3.746 | -6.684 | 2.984 | 0.915 | 5.569 | -4.142 | 10 | 1.636 | 3.886 | -0.909 | 7.432 | 1.84 | 2.657 | -2.406 | 5.133 | 3.7 | 3.277 | -2.529 | 7.766 | 2.727 | 2.578 | 6.188 | 1.898 | 1.584 | 0.445 |
| Percentage of IncreaseDecreaseInAccountsReceivable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1.202 | 8.17 | -5.364 | 14 | 2.674 | 3.746 | -6.684 | 2.984 | 0.915 | 5.569 | -4.142 | 10 | 1.636 | 3.886 | -0.909 | 7.432 | 1.84 | 2.657 | -2.406 |
| Percentage of IncreaseDecreaseInAccountsReceivable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 179 | 151 | 46 | 148 | 152 | 126 | 37 | 132 | 139 | 147 | 34 | 126 | 137 | 112 | 36 | 124 | 115 | 110 | 35 | 93 | 93 | 55 | 45 | 52 | 74 | 28 | 28 | 42 | 41 | 47 | 11 | 2.283 | -3.34 | 5.379 | -2.736 | -2.185 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 15.6 | 47.7 | 53.9 | 43.7 | 13.2 | 44.6 | 49.5 | 53.0 | 12.7 | 45.2 | 52.0 | 43.6 | 15.1 | 50.3 | 48.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -18.4 | 0.0 | 0.0 | -222.3 |
| 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 | 179 | 151 | 46 | 148 | 152 | 126 | 37 | 132 | 139 | 147 | 34 | 126 | 137 | 112 | 36 | 124 | 115 | 110 | 23 |
| 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 | 66.5 |
| Percentage of Revenues | 0.0 | 0.0 | 15.6 | 47.7 | 53.9 | 43.7 | 13.2 | 44.6 | 49.5 | 53.0 | 12.7 | 45.2 | 52.0 | 43.6 | 15.1 | 50.3 | 48.6 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 15.6 | 47.7 | 53.9 | 43.7 | 13.2 | 44.6 | 49.5 | 53.0 | 12.7 | 45.2 | 52.0 | 43.6 | 15.1 | 50.3 | 48.6 | 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 |
| Value | 51 | 48 | 45 | 40 | 31 | 37 | 41 | 41 | 40 | 33 | 34 | 30 | 25 | 21 | 30 | 19 | 15 | 11 | 9.338 | -0.167 | -3.753 | 5.028 | -11.347 | -19.938 | -8.398 | -8.265 | -9.992 | -12.796 | -3.369 | -6.935 | -9.471 | -3.861 | 1.123 | -6.857 | -5.831 | -2.675 | -1.566 | -0.164 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 15.1 | 12.9 | 11.2 | 13.0 | 14.6 | 13.9 | 14.3 | 11.9 | 12.8 | 10.8 | 9.8 | 8.3 | 12.6 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 6.2 | 0.0 | 0.0 | -272.1 | -851.1 | 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 |
| Value | 51 | 48 | 45 | 40 | 31 | 37 | 41 | 41 | 40 | 33 | 34 | 30 | 25 | 21 | 30 | 19 | 15 | 11 | 9.338 | -0.167 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | 15.1 | 12.9 | 11.2 | 13.0 | 14.6 | 13.9 | 14.3 | 11.9 | 12.8 | 10.8 | 9.8 | 8.3 | 12.6 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | 15.1 | 12.9 | 11.2 | 13.0 | 14.6 | 13.9 | 14.3 | 11.9 | 12.8 | 10.8 | 9.8 | 8.3 | 12.6 | 7.7 | 6.4 | 0.0 | 0.0 | 0.0 |
| 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 |
| Value | 3.218 | 4.925 | 3.819 | 2.656 | 3.501 | 4.099 | 4.004 | 3.026 | 3.32 | 2.881 | -3.15 | 1.114 | -4.485 | 0.309 | -0.03 | -0.301 | -6.64 | 7.316 | -0.761 | 3.836 | 3.558 | 3.109 | 3.73 | 3.956 | 3.751 | 3.382 | 4.212 | 3.62 | 3.888 | 3.798 |
| Percentage of ProfitLoss | 6.2 | 10.1 | 9.5 | 8.4 | 9.3 | 9.9 | 9.9 | 9.1 | 9.6 | 9.5 | -12.2 | 5.2 | -14.7 | 1.6 | -0.2 | -2.6 | -71.1 | -4380.8 | 20.3 | 76.3 | -31.4 | -15.6 | -44.4 | -47.9 | -37.5 | -26.4 | -125.0 | -52.2 | -41.1 | -98.4 |
| Percentage of Revenues | 0.0 | 0.0 | 1.2 | 0.9 | 1.2 | 1.4 | 1.4 | 1.1 | 1.2 | 1.0 | -1.2 | 0.4 | -1.8 | 0.1 | -0.0 | 0.0 | 0.0 | 0.0 | 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 Revenues us-gaap:NoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 48 | 43 | 36 | 29 | 34 | 37 | 36 | 30 | 31 | 27 | 29 | 20 | 35 | 18 | 15 | 12 | 15 |
| Percentage of ProfitLoss | 93.8 | 89.9 | 90.5 | 91.6 | 90.7 | 90.1 | 90.1 | 90.9 | 90.4 | 90.5 | 112.2 | 94.8 | 114.7 | 98.4 | 100.2 | 102.6 | 171.1 |
| Percentage of Revenues | 0.0 | 0.0 | 11.7 | 10.3 | 11.7 | 12.5 | 12.9 | 10.8 | 11.6 | 9.8 | 11.0 | 7.9 | 14.4 | 7.6 | 6.4 | 0.0 | 0.0 |
| Percentage of Revenues us-gaap:Parent | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 48 | 43 | 36 | 29 | 34 | 37 | 36 | 30 | 31 | 27 | 29 | 20 | 35 | 18 | 15 | 12 | 15 | -7.483 | -2.992 | 1.192 | -14.905 | -23.047 | -12.128 | -12.221 | -13.743 | -16.178 | -7.581 | -10.555 | -13.359 | -7.659 |
| Percentage of ProfitLoss | 93.8 | 89.9 | 90.5 | 91.6 | 90.7 | 90.1 | 90.1 | 90.9 | 90.4 | 90.5 | 112.2 | 94.8 | 114.7 | 98.4 | 100.2 | 102.6 | 171.1 | 4480.8 | 79.7 | 23.7 | 131.4 | 115.6 | 144.4 | 147.9 | 137.5 | 126.4 | 225.0 | 152.2 | 141.1 | 198.4 |
| Percentage of Revenues | 0.0 | 0.0 | 11.7 | 10.3 | 11.7 | 12.5 | 12.9 | 10.8 | 11.6 | 9.8 | 11.0 | 7.9 | 14.4 | 7.6 | 6.4 | 0.0 | 0.0 | 0.0 | 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 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 |
| 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 | 3.151 | 8.11 | 3.766 | 2.17 | 2.09 | 1.808 | 1.299 | 1.288 | 1.269 | 0.952 | 0.683 | 0.832 | 0.943 | 0.975 | 1.037 | 1.116 | 1.121 | 0.938 | 0.892 | 0.891 | 0.983 | 0.87 | 0.782 | 0.913 | 0.734 | 0.696 | 0.691 | 0.751 | 0.612 | 0.532 | 0.473 | 0.153 | 0.279 | 0.174 |
| Percentage of ShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 3.151 | 8.11 | 3.766 | 2.17 | 2.09 | 1.808 | 1.299 | 1.288 | 1.269 | 0.952 | 0.683 | 0.832 | 0.943 | 0.975 | 1.037 | 1.116 | 1.121 | 0.938 | 0.892 |
| Percentage of ShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -376.928 | -208.23 | -205.833 | -114.626 | -143.252 | -179.214 | -152.77 | -54.063 | -39.164 | -130.869 | -192.497 | -156.284 | -103.996 | -221.631 | -350.583 | -264.38 | -152.519 | -69.997 | -70.363 | -41.847 | -33.868 | -376.32 | -141.016 | -166.394 | -204.36 | -373.172 | -639.388 | -538.407 | -343.883 | -379.074 | -362.275 | -503.649 | -917.102 | -586.345 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | -68.8 | -36.9 | -50.6 | -61.9 | -53.8 | -18.1 | -13.9 | -46.9 | -71.2 | -55.8 | -39.3 | -85.9 | -144.4 | -107.1 | -64.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -5061.3 | 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 |
| Value | -376.928 | -208.23 | -205.833 | -114.626 | -143.252 | -179.214 | -152.77 | -54.063 | -39.164 | -130.869 | -192.497 | -156.284 | -103.996 | -221.631 | -350.583 | -264.38 | -152.519 | -69.997 | -78.389 |
| 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 | 111.4 |
| Percentage of Revenues | 0.0 | 0.0 | -68.8 | -36.9 | -50.6 | -61.9 | -53.8 | -18.1 | -13.9 | -46.9 | -71.2 | -55.8 | -39.3 | -85.9 | -144.4 | -107.1 | -64.4 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | -68.8 | -36.9 | -50.6 | -61.9 | -53.8 | -18.1 | -13.9 | -46.9 | -71.2 | -55.8 | -39.3 | -85.9 | -144.4 | -107.1 | -64.4 | 0.0 | 0.0 |
| Period End | 2021-07-31 | 2021-04-30 | 2021-02-19 | 2020-10-31 | 2020-02-21 |
| Value | 143 | 64 | 89 | 57 | 84 |
| Percentage of PaymentsToAcquireRealEstate | 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 |
| Value | 168 | 3.26 | -17.806 | 247 | -9.94 | 50 | -18.593 | -65.76 | -128.229 | 120 | 67 | 83 | -181.119 | 286 | 133 | 307 | -397.66 | 340 | 67 | -215.752 | 138 | 334 | -85.131 | 262 | 104 | 351 | 615 | 360 | 438 | 286 | 341 | 408 | 652 | 703 | 497 | 2.185 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | -5.9 | 79.5 | -3.5 | 17.4 | -6.5 | -22.0 | -45.5 | 43.1 | 24.8 | 29.8 | -68.5 | 111.0 | 55.1 | 124.6 | -167.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 3600.7 | 0.0 | 0.0 | 222.3 |
| 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 | 168 | 3.26 | -17.806 | 247 | -9.94 | 50 | -18.593 | -65.76 | -128.229 | 120 | 67 | 83 | -181.119 | 286 | 133 | 307 | -397.66 | 340 | 67 |
| 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 |
| Percentage of Revenues | 0.0 | 0.0 | -5.9 | 79.5 | -3.5 | 17.4 | -6.5 | -22.0 | -45.5 | 43.1 | 24.8 | 29.8 | -68.5 | 111.0 | 55.1 | 124.6 | -167.8 | 0.0 | 0.0 |
| Percentage of Revenues amh:AmericanHomes4RentLimitedPartnership | 0.0 | 0.0 | -5.9 | 79.5 | -3.5 | 17.4 | -6.5 | -22.0 | -45.5 | 43.1 | 24.8 | 29.8 | -68.5 | 111.0 | 55.1 | 124.6 | -167.8 | 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 |
| Value | 32 | 47 | 0.032 | 15 | 15 | 30 | 0.0 | 30 | 14 | 14 | 14 | 14 | 14 | 14 | 0.011 | 13 | 12 | 12 | 12 | 11 | 11 | 12 | 10 | 10 | 10 | 10 | 10 | 10 | 9.277 | 9.274 | 0.0 |
| Percentage of PaymentsOfDividendsCommonStock | 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 | 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 |
| Value | 37 | 55 | 0.032 | 18 | 17 | 35 | 0.0 | 35 | 17 | 17 | 17 | 17 | 14 | 19 | 0.011 | 16 | 15 | 14 | 14 |
| Percentage of PaymentsOfDividendsCommonStock | 115.9 | 116.3 | 100.0 | 116.5 | 117.2 | 117.2 | 0.0 | 117.3 | 118.4 | 118.5 | 118.6 | 118.7 | 100.5 | 138.1 | 100.0 | 120.3 | 121.4 | 122.8 | 122.8 |
| 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 |
| Value | 17.68 | 17.4 | 17.39 | 17.35 | 16.93 | 16.92 | 16.92 | 16.79 | 16.76 | 16.65 | 16.64 | 16.62 | 16.62 | 15.69 | 15.7 | 15.71 | 15.74 | 16.22 | 16.23 | 16.23 | 16.22 | 16.17 | 16.17 | 16.17 | 15.99 | 15.48 | 15.0 | 15.0 | 15.0 | 15.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.053 | 0.105 | 13 | 0.0 | -0.009 | 0.041 | 12 | -26.721 | 0.147 | 26 | 15 | 0.222 |
| Percentage of AccruedDistributionsToNonAffiliatesPayable | 100.0 | 100.0 | 100.0 | 0.0 | 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 |
| Value | 0.053 | 0.105 | 13 | 0.0 | -0.009 | 0.041 | 12 | -26.721 | 0.147 | 26 | 15 | 0.222 |
| Percentage of AccruedDistributionsToNonAffiliatesPayable | 100.0 | 100.0 | 100.0 | 0.0 | 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 | 2.968 | 4.846 | 3.579 | 1.616 | 1.956 | 2.147 | 0.769 | 0.651 | 0.97 | 0.834 | 1.538 | 1.055 | 1.321 | 1.311 | 0.809 | 1.306 | 1.412 | 1.096 | 0.544 | 1.757 | 3.489 | 5.653 |
| Percentage of AcquisitionCostBusinessCombinationPropertyAcquisition | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2.968 | 4.846 | 3.579 | 1.616 | 1.956 | 2.147 | 0.769 | 0.651 | 0.97 | 0.834 | 1.538 | 1.055 | 1.321 | 1.311 | 0.809 | 1.306 | 1.412 | 1.096 | 0.544 | 1.757 |
| Percentage of AcquisitionCostBusinessCombinationPropertyAcquisition | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 |
| Value | 600000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 500000.0 | 400000.0 | 400000.0 | 2600000.0 | 2400000.0 | 2400000.0 | 2000000.0 | 1700000.0 | 1400000.0 | 900000.0 | 600000.0 | 600000.0 | 2200000.0 | 700000.0 |
| Percentage of AmortizationOfDeferredFinancingCosts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 1.1 | 1.0 | 0.9999999999999996 | 1.0 | 1.1 | 1.0 | 1.3 | 1.8 | 2.4 | 2.5 | 3.3 | 2.9 | 2.5 | 2.2 | 2.0 | 2.1 | 2.2 | 2.9 | 4.5 | 6.9 | 12 | 7.6 | 3.1 | 2.8 | 4.0 | 3.2 | 3.4 | 4.0 | 3.5 | 4.1 | 5.6 | 3.2 | 1.9 |
| Percentage of AmortizationOfIntangibleAssetsAndDeferredLeasingFees | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 8.517 | 37 | 26 | 22 | 15 | 20 | 23 | 23 | 22 | 16 | 17 | 14 | -15.333 | 13 | -21.905 | 1.535 | -0.185 | -1.603 | 2.47 | -21.116 |
| Percentage of ComprehensiveIncomeLossNetOfTaxAvailableForCommonShareholders | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 9.851 | 44 | 31 | 26 | 17 | 23 | 27 | 27 | 26 | 19 | 20 | 17 | -18.294 | 16 | -26.537 | 1.875 | -0.217 | -1.924 | 1.682 | -24.497 |
| Percentage of ComprehensiveIncomeLossNetOfTaxAvailableForCommonShareholders | 115.7 | 116.3 | 116.5 | 116.9 | 117.3 | 117.3 | 117.3 | 117.4 | 117.8 | 118.6 | 118.8 | 118.9 | 119.3 | 119.3 | 121.1 | 122.1 | 117.3 | 120.0 | 68.1 | 116.0 |
| Period End | 2020-10-31 |
| Value | 22 |
| Percentage of ContributionOfLandAndInProcessDevelopmentProjectToJointVentures | 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 |
| Value | 11 | 15 | 10 | 12 | 10 | 13 | 10 | 13 | 13 | 5.6 | 7.5 | 3.4 | 3.2 | 2.1 | 0.5 | 1.9 | 2.2 | -1.0 |
| Percentage of GainLossOnPropertiesSoldExcludingJointVentureProperties | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -62000.0 | -77000.0 | 0 | 0 | 0 | 7000.0 | 126000.0 | 15000.0 | 156000.0 | 70000.0 | 0 | 82000.0 | 0 |
| Percentage of GainLossOnPropertiesSoldLand | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 |
| Period End | 2020-09-30 |
| Value | 3.5 |
| Percentage of GuarantorObligationsBasisSpreadOnVariableRate | 100.0 |
| Period End | 2021-06-30 | 2020-06-30 |
| Value | 1056300.0 | 400700.0 |
| Percentage of IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsAndForwardSaleEquityContracts | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2020-06-30 |
| Value | 1056300.0 | 400700.0 |
| Percentage of IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsAndForwardSaleEquityContracts | 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 | 2018-03-31 | 2017-03-31 |
| Value | 20 | 30 | 22 | 15 | 20 | 23 | 22 | 16 | 5.791 | -1.49 |
| Percentage of NetIncomeLossAvailableToCommonStockholdersIncludingAllocationToParticipatingSecuritiesBasicAndDiluted | 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 | 2018-03-31 | 2017-03-31 |
| Value | 23 | 35 | 26 | 17 | 23 | 27 | 26 | 19 | 6.916 | -1.829 |
| Percentage of NetIncomeLossAvailableToCommonStockholdersIncludingAllocationToParticipatingSecuritiesBasicAndDiluted | 116.1 | 116.4 | 117.0 | 117.3 | 117.3 | 117.5 | 117.8 | 118.6 | 119.4 | 122.8 |
| 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 |
| Value | 0.06 | 0.09 | 0.09 | 0.07 | 0.05 | 0.07 | 0.08 | 0.08 | 0.08 | 0.05 | 0.06 | 0.05 | -0.05 | 0.02 | -0.08 | 0 | 0 | -0.01 | 0.01 | -0.09 |
| Percentage of NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitDilutedNetOfTax | 100.0 | 100.0 | 100.0 | 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 |
| Period End | 2020-07-31 | 2020-04-30 | 2020-02-21 | 2019-10-31 | 2019-07-31 | 2019-04-30 | 2019-02-22 | 2018-10-31 | 2017-07-31 | 2017-04-30 | 2017-02-22 | 2016-10-31 |
| Value | 91.0 | 60.0 | 297.0 | 116.0 | 110.0 | 44.0 | 61.0 | 138.0 | 27.0 | 41.0 | 60.0 | 36.0 |
| Percentage of NumberOfRealEstatePropertiesSold | 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 |
| Value | 37 | 36 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
| Percentage of PartnersCapitalAccountDistributionsCommonUnits | 100.0 | 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 |
| Value | 32 | 31 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 |
| Percentage of PartnersCapitalAccountDistributionsCommonUnits | 86.3 | 86.0 | 85.9 | 85.3 | 85.3 | 85.3 | 85.2 | 84.5 | 84.3 | 84.3 | 84.3 | 83.8 | 83.8 |
| 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 |
| Value | 5.138 | 5.172 | 2.602 | 2.601 | 2.602 | 2.601 | 2.611 | 2.741 | 2.766 | 2.768 | 2.767 | 2.768 | 2.767 |
| Percentage of PartnersCapitalAccountDistributionsCommonUnits | 13.7 | 14.0 | 14.1 | 14.7 | 14.7 | 14.7 | 14.8 | 15.5 | 15.7 | 15.7 | 15.7 | 16.2 | 16.2 |
| 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 |
| Value | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 14 | 14 |
| Percentage of PartnersCapitalAccountDistributionsPreferredUnits | 100.0 | 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 |
| Value | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 14 | 14 |
| Percentage of PartnersCapitalAccountDistributionsPreferredUnits | 100.0 | 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 | 168 | 141 | 143 | 148 | 132 | 138 | 146 | 96 | 59 | 79 | 66 | 54 | 95 | 0.0 |
| Percentage of PaymentsForDevelopmentActivities | 100.0 | 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 |
| Value | 168 | 141 | 143 | 148 | 132 | 138 | 146 | 96 | 59 | 79 | 66 | 54 | 95 | 0.0 |
| Percentage of PaymentsForDevelopmentActivities | 100.0 | 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 | 2013-12-31 |
| Value | 30 | 26 | 25 | 32 | 25 | 21 | 19 | 18 | 17 | 15 | 13 | 17 | 12 | 11 | 10 | 11 | 8.554 | 6.484 | 5.781 | 9.351 | 8.149 | 4.526 | 4.361 | 7.083 | 9.468 | 6.457 | 4.26 | 0.0 |
| Percentage of PaymentsForMaintenanceCapitalExpenditures | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 30 | 26 | 25 | 32 | 25 | 21 | 19 | 18 | 17 | 15 | 13 | 17 | 12 | 11 | 10 | 11 | 8.554 | 6.484 | 5.781 |
| Percentage of PaymentsForMaintenanceCapitalExpenditures | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 69 | 72 | 58 | 106 | 80 | 75 | 60 | 55 | 28 | 23 | 29 | 27 | 28 | 8.693 | 1.526 | 3.01 | 0.0 | 0.0 | 0.0 |
| Percentage of TransferOfCompletedHomebuildingDeliveriesToProperties | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 | 69 | 72 | 58 | 106 | 80 | 75 | 60 | 55 | 28 | 23 | 29 | 27 | 28 | 8.693 | 1.526 | 3.01 | 0.0 | 0.0 | 0.0 |
| Percentage of TransferOfCompletedHomebuildingDeliveriesToProperties | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 | 5.5 | 5.2 | 4.699999999999998 | 4.3 | 3.3 | 4.0 | 3.6 | 3.7 | 3.5 | 3.0 |
| Percentage of VariableLeasePaymentsLateFeesAndApplicationFees | 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 | 38 | 45 | 35 | 49 | 35 | 40 | 36 | 48 | 35 | 40 |
| Percentage of VariableLeasePaymentsTenantChargebacks | 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 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 372 | 369 | 3.262305 | 360 | 353 | 353 | 0.096662 | 353 | 352 | 352 | 0.948993 | 352 | 350 | 342 | 7.437478 | 344 | 299 | 5.918187 | 285 |
| Percentage of WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingDiluted | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.2 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts | 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 |
| Value | 10 | 31 | 21 | 2.247 | 2.996 | 9.618 | 3.454 | 4.985 | 3.068 | 6.769 | 2.028 | -1.086 |
| Percentage of CapitalExpendituresIncurredButNotYetPaid | 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 |
| Value | 10 | 31 | 21 | 2.247 | 2.996 | 9.618 | 3.454 | 4.985 | 3.068 | 6.769 | 2.028 | -1.086 |
| Percentage of CapitalExpendituresIncurredButNotYetPaid | 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 | 2021-02-24 | 2019-02-21 | 2018-11-01 | 2018-02-22 | 2017-02-23 | 2016-11-01 | 2016-08-02 | 2016-05-03 | 2016-02-25 | 2015-04-30 | 2015-01-31 | 2014-10-31 | 2014-08-04 | 2014-05-08 |
| Value | 0.1 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| 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 |
| Period End | 2021-02-24 | 2019-02-21 | 2018-11-01 | 2018-05-03 | 2018-02-22 | 2017-02-23 | 2016-11-01 | 2016-08-02 | 2016-05-03 | 2016-02-25 | 2015-05-07 | 2015-01-31 | 2014-10-31 |
| Value | 0.1 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| Percentage of CommonStockDividendsPerShareDeclared | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2017-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 6.179 | 23 | 53 | 60 | 9.143 | 9.835 | 1.849 | 13 | 5.19 | 0.0 | 0.0 | 40 | 0.0 | 1.719 | 7.05 | 23 |
| Percentage of ContributionOfProperty | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 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 | 2017-12-31 |
| Value | 6.179 | 23 | 53 | 60 | 9.143 | 9.835 | 1.849 | 13 | 5.19 | 0.0 | 0.0 | 40 | 0.0 |
| Percentage of ContributionOfProperty | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 | 2016-09-30 | 2014-12-31 | 2014-09-30 | 2013-12-31 | 2013-09-30 | 2013-06-30 |
| Value | 15 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 32 | 42 | 8.391 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10 |
| Percentage of ConvertiblePreferredStockConvertedToOtherSecurities | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 | 2016-09-30 |
| Value | 15 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 32 | 42 | 8.391 | 0.0 | 0.0 | 0.0 |
| Percentage of ConvertiblePreferredStockConvertedToOtherSecurities | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 |
| 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 |
| Value | 87 | 86 | 83 | 81 | 79 | 78 | 78 | 76 |
| Percentage of Depreciation | 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 | 2.6 | 2.8 | 2.5 | 2.3 | 2.1 | 2.0 | 1.9 | 2.0 | 1.8 | 1.9 | 1.8 | 1.8 | 1.7 |
| Percentage of Depreciation | 3.0 | 3.2 | 0.0 | 2.7 | 2.6 | 2.5 | 0.0 | 2.6 | 2.3 | 2.5 | 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 | 2012-12-31 | 2012-09-30 | 2012-06-30 |
| Value | 91 | 90 | 88 | 86 | 84 | 82 | 83 | 82 | 82 | 81 | 81 | 79 | 78 | 79 | 75 | 74 | 72 | 73 | 74 | 75 | 79 | 69 | 62 | 67 | 59 | 53 | 47 | 44 | 38 | 35 | 33 | 24 | 10 | 1.519 | 0.49 | 0.077 |
| Percentage of DepreciationAndAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 91 | 90 | 88 | 86 | 84 | 82 | 83 | 82 | 82 | 81 | 81 | 79 | 78 | 79 | 75 | 74 | 72 | 73 | 74 | 75 |
| Percentage of DepreciationAndAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 32 | 31 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 12 | 12 | 12 | 11 | 11 | 12 | 10 | 10 | 10 | 10 | 10 | 10 | 9.276 | 9.275 |
| 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 | 100.0 | 100.0 | 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 |
| Value | 32 | 31 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 12 | 12 | 12 |
| 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 | 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 |
| Value | 32 | 31 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 12 | 12 | 12 | 11 | 11 | 12 | 10 | 10 | 10 | 10 | 10 | 10 | 9.276 | 9.275 |
| 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 | 100.0 | 100.0 | 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 |
| Value | 8.479 | 25 | 47 | 63 | 16 | 0.887 | 5.168 | 11 | 6.032 | 0.282 | 0.666 | 33 | 1.21 | 1.23 | 3.311 | 3.837 | 0.952 | 1.192 | 1.947 | 0.63 | 5.77 | 0.0 | 0.0 | 0.0 |
| 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 | 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 |
| Value | 8.479 | 25 | 47 | 63 | 16 | 0.887 | 5.168 | 11 | 6.032 | 0.282 | 0.666 | 33 | 1.21 | 1.23 | 3.311 | 3.837 | 0.952 | 1.192 | 1.947 |
| 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 |
| Period End | 2020-10-31 | 2020-07-31 |
| Value | 18 | 46 |
| Percentage of EquityMethodInvestmentDividendsOrDistributions | 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 |
| Value | 10 | 16 | 10 | 12 | 10 | 10 | 10 | 13 | 13 | 5.649 | 7.497 | 4.953 | 3.24 | 2.256 | 0.451 | 1.895 | 2.454 | 2.026 | 1.995 | 11 | 0.658 | 0.234 | 0.0 | 0.0 |
| Percentage of GainLossOnSaleOfProperties | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 10 | 16 | 10 | 12 | 10 | 10 | 10 | 13 | 13 | 5.649 | 7.497 | 4.953 | 3.24 | 2.256 | 0.451 | 1.895 | 2.454 | 2.026 | 1.995 | 11 |
| Percentage of GainLossOnSaleOfProperties | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 |
| Value | 105000.0 | 216000.0 | 654000.0 | 4446000.0 | 580000.0 | 1650000.0 | 929000.0 | 504000.0 | 3062000.0 | 560000.0 | 1536000.0 | 700000.0 | 894000.0 | 1299000.0 | 1558000.0 | 929000.0 | 3503000.0 | 567000.0 | 726000.0 | 174000.0 | 0 |
| Percentage of ImpairmentOfRealEstate | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 105000.0 | 216000.0 | 654000.0 | 4446000.0 | 580000.0 | 1650000.0 | 929000.0 | 504000.0 | 3062000.0 | 560000.0 | 1536000.0 | 700000.0 | 894000.0 | 1299000.0 | 1558000.0 | 929000.0 | 3503000.0 |
| Percentage of ImpairmentOfRealEstate | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2015-03-31 | 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 | 3.218 | 4.925 | 4.479 | 3.819 | 2.656 | 3.501 | 4.092 | 4.099 | 4.004 | 3.026 | 3.32 | 2.881 | -3.15 | 1.114 | -4.485 | 0.309 | -0.03 | -0.301 | -6.64 | 7.316 | -0.761 | 3.836 | 3.956 | 3.751 | 3.382 | 4.212 | 3.62 | 3.888 | 3.798 | 4.664 | 0.895 |
| Percentage of IncomeLossAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2013-12-31 |
| Value | 294000.0 | 366000.0 | 189000.0 | 127000.0 | 141000.0 | -1231000.0 | -262000.0 | 918000.0 | -121000.0 | -26000.0 | 123000.0 | -164000.0 | 273000.0 | 314000.0 | 275000.0 | -256000.0 | 1328000.0 | 295000.0 | 442000.0 | 679000.0 | -29000.0 | -232000.0 | -206000.0 | -658000.0 | 369000.0 | -96000.0 | -76000.0 | -45000.0 | 0 |
| 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 | 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 |
| Value | 294000.0 | 366000.0 | 189000.0 | 127000.0 | 141000.0 | -1231000.0 | -262000.0 | 918000.0 | -121000.0 | -26000.0 | 123000.0 | -164000.0 | 273000.0 | 314000.0 | 275000.0 | -256000.0 | 1328000.0 | 295000.0 | 442000.0 |
| 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 |
| 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 | 43 | 23 | -82.208 | 35 | 42 | 18 | -78.094 | 21 | 32 | 42 | -75.666 | 26 | 31 | 29 | -61.511 | 30 | 18 | 22 | -61.211 | 23 | 28 | -4.011 | -21.557 | 20 | 23 | -17.117 | 0.378 | 10 | 3.912 | 3.972 | 29 | 0.903 | 5.192 | 4.762 |
| Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 43 | 23 | -82.208 | 35 | 42 | 18 | -78.094 | 21 | 32 | 42 | -75.666 | 26 | 31 | 29 | -61.511 | 30 | 18 | 22 | -61.211 |
| Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.905 | 0.975 | 1.011 | 1.157 | 0.992 | 0.91 | 0.851 | 1.115 | 1.13 | 0.999 | 3.047 | 3.722 | 3.111 | 2.723 | 2.029 | 1.96 | 1.919 | 1.482 | 1.806 | 2.119 | 2.151 | 1.929 | 1.844 | 2.312 | 3.011 | 2.41 | 1.151 | 1.593 | 2.531 | 0.972 | 3.362 | 3.151 |
| Percentage of IncreaseDecreaseInDeferredLeasingFees | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.905 | 0.975 | 1.011 | 1.157 | 0.992 | 0.91 | 0.851 | 1.115 | 1.13 | 0.999 | 3.047 | 3.722 | 3.111 | 2.723 | 2.029 | 1.96 | 1.919 | 1.482 | 1.806 |
| Percentage of IncreaseDecreaseInDeferredLeasingFees | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | -645000.0 | 338000.0 | -736000.0 | 545000.0 | 299000.0 | 182000.0 | 553000.0 | -273000.0 |
| Percentage of IncreaseDecreaseInDueFromRelatedParties | 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 | -645000.0 | 338000.0 | -736000.0 | 545000.0 | 299000.0 | 182000.0 | 553000.0 | -273000.0 |
| Percentage of IncreaseDecreaseInDueFromRelatedParties | 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 | -1.128 | -5.742 | 5.227 | -10.009 | -3.85 | 5.98 | 7.429 | -5.399 | 7.044 | 1.096 | 10 | -4.74 | -1.309 | 13 | 5.605 | -1.75 | -0.916 | 8.356 | 5.567 | 4.236 | -3.148 | -0.659 | 3.072 | 7.686 | -5.365 | 2.819 | 2.146 | -0.303 | -2.791 | -3.237 | 13 | 2.318 | 0.197 | 0.278 |
| Percentage of IncreaseDecreaseInPrepaidExpensesOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -1.128 | -5.742 | 5.227 | -10.009 | -3.85 | 5.98 | 7.429 | -5.399 | 7.044 | 1.096 | 10 | -4.74 | -1.309 | 13 | 5.605 | -1.75 | -0.916 | 8.356 | 5.567 |
| Percentage of IncreaseDecreaseInPrepaidExpensesOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-03-31 |
| Value | 458940.0 | 5047.0 | 461280.0 | 400700.0 | 492000.0 | -1519.0 | 451880.0 | 524560.0 | 611190.0 | -34501.0 | 753140.0 | 0 | 544430.0 | 0 | 0 | 0 |
| Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 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 | 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 | 2017-12-31 | 2017-09-30 | 2017-03-31 |
| Value | 458940.0 | 5047.0 | 461280.0 | 400700.0 | 492000.0 | -1519.0 | 451880.0 | 524560.0 | 611190.0 | -34501.0 | 753140.0 | 0 | 544430.0 | 0 | 0 | 0 |
| Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 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 | 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 |
| Value | 6.887 | 5.878 | 5.467 | 4.808 | 5.072 | 4.649 | 3.002 | 2.748 | 2.65 | 2.697 | 1.458 | 1.414 | 1.363 | 2.436 | 2.485 | 1.533 | 1.035 | 0.603 | 0.713 | 0.582 |
| Percentage of InterestCostsCapitalizedAdjustment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 34 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 35 | 34 | 32 | 32 | 33 | 31 | 28 | 28 | 29 | 32 | 32 | 33 | 35 | 31 | 28 | 25 | 23 | 20 | 13 | 8.5 | 6.298 | 4.43 | 2.591 | 5.027 | 2.028 | 0.37 |
| Percentage of InterestCostsIncurred | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.2 | 86.0 | 0.1 |
| Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | -0.2 | 14.0 | -0.1 |
| Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest | 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 |
| Value | 36 | 146 | -18.1 | 79 | -50.5 | 71 | 71 | 0.2 | -11.8 | 15 | -23.0 | -13.9 |
| Percentage of LongTermPurchaseCommitmentAmount | 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 |
| Value | 107 | 90 | 6.8 | 9.9 | 16 | 38 | -21.0 | 9.1 | 5.4 | 50 | -9.2 | 24 | 0.1 | 42 | 10 | 4.8 |
| Percentage of LongTermPurchaseCommitmentAmount | 297.8 | 61.3 | -37.6 | 12.5 | -33.3 | 54.4 | -29.3 | 4550.0 | -45.8 | 336.4 | 40.0 | -178.4 | 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 |
| Value | 0.06 | 0.1 | 0.09 | 0.07 | 0.05 | 0.07 | 0.08 | 0.08 | 0.08 | 0.05 | 0.06 | 0.05 | -0.05 | 0.02 | -0.08 | 0.01 | 0 | -0.01 | 0.01 | -0.09 |
| Percentage of NetIncomeLossPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasic | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 |
| Value | 313 | 312 | 307 | 280 | 287 | 293 | 279 | 277 | 278 | 262 |
| Percentage of OperatingLeaseLeaseIncome | 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 |
| Value | 313 | 312 | 307 | 280 | 287 | 293 | 279 | 277 | 278 | 262 |
| Percentage of OperatingLeaseLeaseIncome | 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 | 2018-03-31 |
| Value | -13229000.0 | 9230000.0 | 9600000.0 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | -13229000.0 | 9230000.0 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax | 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 | 240000.0 | 241000.0 | 241000.0 | 241000.0 | 240000.0 | 241000.0 | 241000.0 | 241000.0 | 240000.0 | 241000.0 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax | 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 | 240000.0 | 241000.0 | 241000.0 | 241000.0 | 240000.0 | 241000.0 | 241000.0 | 241000.0 | 240000.0 | 241000.0 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax | 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 | 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 | 2013-09-30 |
| Value | -241000.0 | -240000.0 | -241000.0 | -241000.0 | -240000.0 | -241000.0 | -240000.0 | -241000.0 | -241000.0 | 9433000.0 | 75000.0 | 0 | 0 | -95000.0 | 67000.0 | 28000.0 | 62000.0 | 40000.0 | 46000.0 | 51000.0 | 30000.0 | 0 | -33000.0 | 16000.0 | -212000.0 | 0 | 0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 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 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Period End | 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 |
| Value | -241000.0 | -240000.0 | -241000.0 | -241000.0 | -240000.0 | -241000.0 | -240000.0 | -241000.0 | -241000.0 | 9433000.0 | 75000.0 | 0 | 0 | -95000.0 | 67000.0 | 28000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 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 |
| Period End | 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 |
| Value | -241000.0 | -240000.0 | -241000.0 | -241000.0 | -240000.0 | -241000.0 | -240000.0 | -241000.0 | -241000.0 | 9433000.0 | 75000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 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 | 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 | 2014-12-31 | 2014-09-30 |
| Value | -206000.0 | -205000.0 | -206000.0 | -205000.0 | -203000.0 | -203000.0 | -1633000.0 | -241000.0 | -241000.0 | 9433000.0 | 75000.0 | 0 | 0 | -95000.0 | 67000.0 | 28000.0 | 62000.0 | 40000.0 | 46000.0 | 51000.0 | -33000.0 | 16000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 85.5 | 85.4 | 85.5 | 85.1 | 84.6 | 84.2 | 680.4 | 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 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | -35000.0 | -35000.0 | -35000.0 | -36000.0 | -37000.0 | -38000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 14.5 | 14.6 | 14.5 | 14.9 | 15.4 | 15.8 |
| Period End | 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 |
| Value | -206000.0 | -205000.0 | -206000.0 | -205000.0 | -203000.0 | -203000.0 | -1633000.0 | -241000.0 | -241000.0 | 9433000.0 | 75000.0 | 0 | 0 | -95000.0 | 67000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | 85.5 | 85.4 | 85.5 | 85.1 | 84.6 | 84.2 | 680.4 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 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 | 2.044 | 4.479 | 1.403 | 6.11 | 1.585 | 2.61 | 1.514 | 1.024 | 3.745 | 1.069 | 1.624 | 0.827 | 0.803 | 1.285 | 1.359 | 1.558 | 5.496 | 3.142 | 2.087 | 1.253 |
| 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 |
| 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 |
| Value | 2.044 | 4.479 | 1.403 | 6.11 | 1.585 | 2.61 | 1.514 | 1.024 | 3.745 | 1.069 | 1.624 | 0.827 | 0.803 | 1.285 | 1.359 | 1.558 | 5.496 | 3.142 |
| 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 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 2.877 | 2.409 | 2.252 | 5.24 | 1.946 | 1.51 | 1.865 | 1.601 |
| Percentage of OtherOperatingIncome | 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 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 2.877 | 2.409 | 2.252 | 5.24 | 1.946 | 1.51 | 1.865 | 1.601 |
| Percentage of OtherOperatingIncome | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 800000.0 | 799000.0 | 1660000.0 | 588000.0 |
| Percentage of OtherOperatingIncomeExpenseNet | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 800000.0 | 799000.0 | 1660000.0 | 588000.0 |
| Percentage of OtherOperatingIncomeExpenseNet | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 |
| Value | 268 |
| Percentage of PartnersCapitalAccountRedemptions | 100.0 |
| Period End | 2021-06-30 |
| Value | 230 |
| Percentage of PartnersCapitalAccountRedemptions | 85.6 |
| Period End | 2021-06-30 |
| Value | 8.509 |
| Percentage of PartnersCapitalAccountRedemptions | 3.2 |
| Period End | 2021-06-30 |
| Value | 260 |
| Percentage of PartnersCapitalAccountRedemptions | 96.8 |
| Period End | 2021-06-30 |
| Value | 7.37 |
| Percentage of PartnersCapitalAccountRedemptions | 2.7 |
| Period End | 2021-06-30 |
| Value | 222 |
| Percentage of PartnersCapitalAccountRedemptions | 82.8 |
| Period End | 2021-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-06-30 | 2017-12-31 |
| Value | -4.617 | -2.606 | -33.736 | -6.51 | -186.119 | -1.391 |
| Percentage of PartnersCapitalAccountRedemptions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2017-12-31 |
| Value | 4.617 | 2.606 | 33 | 6.51 | 1.391 |
| Percentage of PartnersCapitalAccountRedemptions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2020-09-30 |
| Value | 193 | 413 |
| Percentage of PartnersCapitalAccountSaleOfUnits | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2020-09-30 |
| Value | 193 | 413 |
| Percentage of PartnersCapitalAccountSaleOfUnits | 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 |
| Value | 3151000.0 | 8110000.0 | 2170000.0 | 2090000.0 | 1808000.0 | 1288000.0 | 1269000.0 | 952000.0 | 683000.0 | 832000.0 | 943000.0 | 975000.0 | 1037000.0 |
| Percentage of PartnersCapitalAccountUnitBasedCompensation | 100.0 | 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 |
| Value | 3151000.0 | 8110000.0 | 2170000.0 | 2090000.0 | 1808000.0 | 1288000.0 | 1269000.0 | 952000.0 | 683000.0 | 832000.0 | 943000.0 | 975000.0 | 1037000.0 |
| Percentage of PartnersCapitalAccountUnitBasedCompensation | 100.0 | 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 | 4.241 | 9.069 | 5.946 | 2.976 | 7.188 | 0.858 | 2.551 | 2.819 | 6.786 | 9.727 | 11 | 7.868 | 12 | 20 | 16 | 12 | 10 | 7.677 | 18 | 4.181 | 5.411 | 12 | 22 | 31 | 33 | 60 | 49 | 44 | 46 | 45 | 60 | 84 | 187 | 49 |
| Percentage of PaymentsForCapitalImprovements | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 4.241 | 9.069 | 5.946 | 2.976 | 7.188 | 0.858 | 2.551 | 2.819 | 6.786 | 9.727 | 11 | 7.868 | 12 | 20 | 16 | 12 | 10 | 7.677 | 18 |
| Percentage of PaymentsForCapitalImprovements | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 3818000.0 | 5341000.0 | 2978000.0 | 740000.0 | -1085000.0 | -2259000.0 | 2628000.0 | 4345000.0 | -672000.0 | 870000.0 |
| Percentage of PaymentsForProceedsFromDepositsOnRealEstateAcquisitions | 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 | 3818000.0 | 5341000.0 | 2978000.0 | 740000.0 | -1085000.0 | -2259000.0 | 2628000.0 | 4345000.0 | -672000.0 | 870000.0 |
| Percentage of PaymentsForProceedsFromDepositsOnRealEstateAcquisitions | 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 |
| Value | 5.138 | 7.758 | 0.0 | 2.602 | 2.601 | 5.178 | 0.0 | 5.212 | 2.741 | 2.748 | 2.768 | 2.767 | 0.079 | 5.457 | 0.0 | 2.778 | 2.776 | 2.779 | 2.778 | 2.677 | 2.914 | 2.991 | 5.42 | 6.055 | 6.054 | 6.054 | 6.054 | 6.022 | 5.83 | 5.975 | 5.332 | 0.639 |
| Percentage of PaymentsOfDividendsMinorityInterest | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 |
| Value | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 27 | 13 | 0.0 | 26 | 11 | 14 | 14 | 0.0 | 17 | 15 | 13 | 13 | 13 | 7.412 | 5.569 | 5.569 | 5.569 | 5.569 | 5.569 | 5.569 | 5.569 | 4.669 | 3.121 | 1.16 |
| Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock | 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 | 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 |
| 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 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 27 | 13 | 0.0 | 26 | 11 | 14 | 14 | 0.0 | 17 | 15 | 13 | 13 |
| Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock | 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 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2018-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 0.6 | 4.022 | 0.114 | 0.236 | 15 | 0.0 | 0.0 |
| Percentage of PaymentsOfStockIssuanceCosts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 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 | 2014-08-31 |
| Value | 0.2 | 0.2 | 0.0 | 9.2 | 0.0 | 0.0 | 0.193 | 9.2 | 0.05 | 0.3 | 0.227 | 4.7 |
| Percentage of PaymentsOfStockIssuanceCosts | 0.0 | 33.3 | 0.0 | 228.7 | 0.0 | 0.0 | 0.0 | 0.0 | 43.9 | 127.1 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 0.0 | 0.4 | 0.0 | 0.3 | 0.1 | 0.2 |
| Percentage of PaymentsOfStockIssuanceCosts | 0.0 | 66.7 | 0.0 | 0.0 | 87.7 | 84.7 |
| Period End | 2021-05-31 |
| Value | 0.2 |
| Percentage of PaymentsOfStockIssuanceCosts | 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 | 14000.0 | 2642000.0 | 13000.0 | 12000.0 | 14000.0 | 1612000.0 | 0 | -1909000.0 | 1913000.0 | 830000.0 | 0 | -276000.0 | 408000.0 | 414000.0 |
| Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 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 | 14000.0 | 2642000.0 | 13000.0 | 12000.0 | 14000.0 | 1612000.0 | 0 | -1909000.0 | 1913000.0 | 830000.0 | 0 | -276000.0 | 408000.0 | 414000.0 |
| Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 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 | 2017-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 6.606 | 7.99 | 14 | 10 | 4.155 | 1.0 | 8.346 | 2.503 | 2.265 | 0.0 | 4.6 | 3.8 | 0.0 | 44 | 0.0 |
| Percentage of PaymentsToAcquireInterestInJointVenture | 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 | 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 | 2017-12-31 |
| Value | 6.606 | 7.99 | 14 | 10 | 4.155 | 1.0 | 8.346 | 2.503 | 2.265 | 0.0 | 4.6 | 3.8 | 0.0 |
| Percentage of PaymentsToAcquireInterestInJointVenture | 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 |
| 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 | 3.357 | 8.258 | 6.002 | 5.133 | 5.148 | 2.411 | 5.95 | 0.042 | 0.089 | 0.04 | -146.319 | 54 | 41 | 53 | 16 | 21 | 3.226 | 13 | 12 | 0.0 | 0.0 | 0.0 |
| Percentage of PaymentsToAcquireOtherProductiveAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 | 3.357 | 8.258 | 6.002 | 5.133 | 5.148 | 2.411 | 5.95 | 0.042 | 0.089 | 0.04 | -146.319 | 54 | 41 | 53 | 16 | 21 | 3.226 | 13 | 12 |
| Percentage of PaymentsToAcquireOtherProductiveAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 196 | 82 | 98 | 33 | 34 | 102 | 42 | 6.522 | 13 | 57 | 156 | 126 | 56 | 149 | 321 | 235 | 153 | 73 | 64 | 125 | 27 | 34 | 56 | 114 | 145 | 292 | 435 | 316 | 256 | 341 | 299 | 418 | 768 | 525 |
| Percentage of PaymentsToAcquireResidentialRealEstate | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 196 | 82 | 98 | 33 | 34 | 102 | 42 | 6.522 | 13 | 57 | 156 | 126 | 56 | 149 | 321 | 235 | 153 | 73 | 64 |
| Percentage of PaymentsToAcquireResidentialRealEstate | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 8500000.0 |
| Percentage of PreferredStockRedemptionPremium | 100.0 |
| Period End | 2021-06-30 |
| Value | 7400000.0 |
| Percentage of PreferredStockRedemptionPremium | 87.1 |
| 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 |
| Value | 0 | 0 | 297000.0 | 3408000.0 | 0 | 2171000.0 | 0 | 0 | 522000.0 | 0 | 0 | 4000000.0 | 0 | 0 | 0 | 0 |
| Percentage of ProceedsFromInsuranceSettlementInvestingActivities | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 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 | 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 | 0 | 0 | 297000.0 | 3408000.0 | 0 | 2171000.0 | 0 | 0 | 522000.0 | 0 | 0 | 4000000.0 | 0 | 0 | 0 | 0 |
| Percentage of ProceedsFromInsuranceSettlementInvestingActivities | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 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 | 2014-12-31 | 2013-12-31 |
| Value | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 339 | 4.977 | 350 | 102 | -0.002 | 0.001 | 0.001 | -0.182 | 0.0 |
| Percentage of ProceedsFromIssuanceOfCommonStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2018-09-30 | 2018-03-31 | 2017-09-30 | 2017-03-31 | 2014-08-31 |
| Value | 411 | 411 | 312 | 336 | 312 | 336 | 313 |
| Percentage of ProceedsFromIssuanceOfCommonStock | 0.0 | 0.0 | 0.0 | 0.0 | 92.0 | 96.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 0.0 | 2.4 | 0.0 | 26 | 5.1 | 14 |
| Percentage of ProceedsFromIssuanceOfCommonStock | 0.0 | 0.0 | 0.0 | 7.9 | 102.5 | 4.1 |
| Period End | 2021-07-31 |
| Value | 731 |
| Percentage of ProceedsFromIssuanceOfUnsecuredDebt | 100.0 |
| 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 |
| Value | 710 | 80 | 0.0 | 25 | 105 | 0.0 | 0.0 | 0.0 | 0.0 | 250 | 55 | 0.0 | 100 | 140 | 0.0 | 62 | 0.0 | 0.0 |
| Percentage of ProceedsFromLinesOfCredit | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| 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 |
| Value | 710 | 80 | 0.0 | 25 | 105 | 0.0 | 0.0 | 0.0 | 0.0 | 250 | 55 | 0.0 | 100 | 140 | 0.0 | 62 | 0.0 | 0.0 | 325 |
| Percentage of ProceedsFromLinesOfCredit | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 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 | 55000.0 | 264000.0 | 0 | 0 | 0 | 71000.0 | 1694000.0 | 316000.0 | 899000.0 | 296000.0 | 0 | 263000.0 | 0 |
| Percentage of ProceedsFromSaleOfLandHeldforinvestment | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 28 | 46 | 43 | 56 | 47 | 81 | 68 | 64 | 82 | 32 | 58 | 17 | 18 | 11 | 18 | 14 | 15 | 24 | 16 | 56 | 7.9 | 7.6 |
| Percentage of ProceedsFromSaleOfRealEstate | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2021-07-31 | 2021-04-30 | 2020-10-31 | 2020-07-31 | 2020-04-30 | 2019-10-31 | 2019-07-31 | 2019-04-30 | 2019-02-22 | 2018-10-31 | 2017-07-31 | 2017-04-30 | 2017-02-22 | 2016-10-31 | 2016-07-31 |
| Value | 8.9 | 10 | 18 | 20 | 13 | 20 | 21 | 8.7 | 11 | 21 | 4.6 | 4.9 | 6.3 | 5.7 | 14 |
| Percentage of ProceedsFromSaleOfRealEstate | 0.0 | 0.0 | 0.0 | 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 |
| Value | 28 | 46 | 43 | 56 | 47 | 81 | 70 | 64 | 54 | 32 |
| Percentage of ProceedsFromSaleOfRealEstateHeldforinvestment | 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 | 28 | 46 | 43 | 56 | 47 | 81 | 70 | 64 | 54 | 32 |
| Percentage of ProceedsFromSaleOfRealEstateHeldforinvestment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-02-19 | 2020-02-21 |
| Value | 25 | 55 |
| Percentage of ProceedsFromSaleOfRealEstateHeldforinvestment | 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 | 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 | 0.909 | 1.121 | 1.412 | 1.258 | 2.892 | 1.449 | 0.419 | 0.769 | 10 | 0.06 | 1.29 | 6.938 | -0.44 | -0.87 | 1.6 | 0.258 | 0.394 | 1.095 | 1.973 | -0.291 | 0.026 | 0.225 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of ProceedsFromStockOptionsExercised | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 |
| Value | 0.909 | 1.121 | 1.412 | 1.258 | 2.892 | 1.449 | 0.419 | 0.769 | 10 | 0.06 | 1.29 | 6.938 | -0.44 | -0.87 | 1.6 | 0.258 | 0.394 |
| Percentage of ProceedsFromStockOptionsExercised | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2014-12-31 | 2013-12-31 |
| Value | 6.16 | 6.118 | 5.391 | 5.347 | 6.328 | 5.435 | 5.23 | 5.551 | 5.18 | 5.556 | 5.178 | 5.179 | 5.178 | 5.312 | 5.409 | 5.677 | 460 | 6.231 | 7.086 | 361 | 6.381 | 6.381 | 2.113 | 0.0 |
| Percentage of RepaymentsOfAccountsReceivableSecuritization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 6.16 | 6.118 | 5.391 | 5.347 | 6.328 | 5.435 | 5.23 | 5.551 | 5.18 | 5.556 | 5.178 | 5.179 | 5.178 | 5.312 | 5.409 | 5.677 | 460 | 6.231 | 7.086 |
| Percentage of RepaymentsOfAccountsReceivableSecuritization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 |
| Value | 0.0 | 130 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 250 | 0.0 | 55 | 0.0 | 240 | 0.0 | 92 | 20 | 0.0 | 75 |
| Percentage of RepaymentsOfLinesOfCredit | 0.0 | 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 | 100.0 | 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 |
| Value | 0.0 | 130 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 250 | 0.0 | 55 | 0.0 | 240 | 0.0 | 92 | 20 | 0.0 | 75 | 392 |
| Percentage of RepaymentsOfLinesOfCredit | 0.0 | 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 | 100.0 | 0.0 | 100.0 | 0.0 |
| Period End | 2020-07-31 | 2019-02-22 | 2018-02-23 |
| Value | 25 | 250 | 240 |
| Percentage of RepaymentsOfLinesOfCredit | 0.0 | 0.0 | 0.0 |
| Period End | 2021-07-31 | 2017-07-31 |
| Value | 620 | 92 |
| Percentage of RepaymentsOfLinesOfCredit | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.537 | 1.308 | 1.603 |
| Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.537 | 1.308 | 1.603 |
| Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-05-31 |
| Value | 194 |
| Percentage of SaleOfStockConsiderationReceivedOnTransaction | 100.0 |
| Period End | 2021-07-31 |
| Value | 467 |
| Percentage of SaleOfStockConsiderationReceivedOnTransaction | 0.0 |
| Period End | 2021-03-31 |
| Value | 200.0 |
| Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage | 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 |
| Value | 0.895 | -1.521 | 1.246 | 2.878 | -0.163 | 0.66 | 10 | -0.76 | 1.058 | 8.229 | 3.068 | -0.408 | 0.17 | 0.537 | 0.188 | -0.095 | 0.394 | 1.093 | 1.357 | 0.19 | 0.025 | 0.22 | 0.0 | -0.134 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 |
| Value | 0.895 | -1.521 | 1.246 | 2.878 | -0.163 | 0.66 | 10 | -0.76 | 8.229 | 3.068 | -0.408 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 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 |
| Value | 0.895 | -1.521 | 1.246 | 2.878 | -0.163 | 0.66 | 10 | -0.76 | 8.229 | 3.068 | -0.408 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 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 |
| Value | 0.001 | 0.002 | 0.001 | 0.002 | 0.002 | 0.0 | 0.006 | 0.001 | 0.001 | 0.005 | 0.001 | 0.001 | 0.0 | 0.0 | 0.0 | 0.001 | 0.0 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 0.1 | -0.1 | 0.1 | 0.1 | -1.2 | 0.0 | 0.1 | -0.1 | 0.1 | 0.1 | 0.0 | -0.2 | 0.0 | 0.0 | 0.0 | -1.1 | 0.0 |
| 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 |
| Value | 0.894 | -1.523 | 1.245 | 2.876 | -0.165 | 0.66 | 10 | -0.761 | 1.057 | 8.224 | 3.067 | -0.409 | 0.17 | 0.537 | 0.188 | -0.096 | 0.394 | 1.093 | 1.356 | 0.189 | 0.025 | 0.22 | 0.0 | -0.134 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 99.9 | 100.1 | 99.9 | 99.9 | 101.2 | 100.0 | 99.9 | 100.1 | 99.9 | 99.9 | 100.0 | 100.2 | 100.0 | 100.0 | 100.0 | 101.1 | 100.0 | 100.0 | 99.9 | 99.5 | 100.0 | 100.0 | 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 |
| Value | 0.895 | -1.521 | 1.246 | 2.878 | -0.163 | 0.66 | 10 | -0.76 | 1.058 | 8.229 | 3.068 | -0.408 | 0.17 | 0.537 | 0.188 | -0.095 | 0.394 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 268 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 100.0 |
| Period End | 2021-06-30 |
| Value | 230 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 85.6 |
| Period End | 2021-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-06-30 |
| Value | -0.004 | -0.002 | -0.026 | -0.005 | -0.109 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 |
| Value | 260 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 96.8 |
| Period End | 2021-06-30 |
| Value | 268 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 100.0 |
| Period End | 2021-06-30 |
| Value | 0.108 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 0.0 |
| Period End | 2021-06-30 |
| Value | 8.509 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 3.2 |
| Period End | 2021-06-30 |
| Value | 222 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 82.8 |
| Period End | 2021-06-30 |
| Value | 230 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 85.6 |
| Period End | 2021-06-30 |
| Value | 0.092 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 0.0 |
| Period End | 2021-06-30 |
| Value | 7.37 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 2.7 |
| Period End | 2021-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | -0.007 | -0.005 | -0.063 | -0.012 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-06-30 |
| Value | -4.613 | -2.604 | -33.71 | -6.505 | -60.44 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 4.624 | 2.611 | 33 | 6.522 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-06-30 |
| Value | -4.624 | -2.611 | -33.799 | -6.522 | -28.258 |
| Percentage of StockRedeemedOrCalledDuringPeriodValue | 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 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 0.101 | 0.093 | 0.065 | 0.056 | 0.042 | 0.054 | 0.044 | 0.048 | 0.045 | 0.031 | 0.019 | 0.02 | 0.0 | 0.023 | 0.0 | 0.012 | 0.0 | 0.0 | 0.0 |
| Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic | 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 | 0.0 | 100.0 | 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 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 0.101 | 0.093 | 0.065 | 0.056 | 0.042 | 0.054 | 0.044 | 0.048 | 0.045 | 0.031 | 0.019 | 0.021 | 0.0 | 0.023 | 0.0 | 0.012 | 0.0 | 10 | 0.0 |
| Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 105.0 | 0.0 | 100.0 | 0.0 | 100.0 | 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 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | 371 | 368 | 3.257258 | 360 | 353 | 352 | 0.098181 | 352 | 352 | 352 | 0.983494 | 351 | 350 | 341 | 7.437478 | 322 | 299 | 5.918187 | 285 |
| Percentage of WeightedAverageLimitedPartnershipAndGeneralPartnershipUnitsOutstandingBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2013-12-31 |
| Value | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 0.0 |
| Percentage of AssetBackedSecuritizationCertificates | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2020-12-31 |
| Value | 57 | 52 |
| Percentage of CommercialRealEstateVehiclesAndFurnitureFixturesAndEquipmentNet | 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 |
| Value | 57 | 52 | 48 | 46 | 43 | 42 | 42 | 43 | 44 | 44 | 44 | 44 | 45 | 43 |
| Percentage of CommercialRealEstateVehiclesandFurnitureFixturesAndEquipmentNet | 100.0 | 100.0 | 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 | 2017-06-30 | 2017-03-31 | 2016-11-30 |
| Value | 497 | 497 | 497 | 497 | 500 | 500 | 500 | 276 | 281 | 400 |
| Percentage of CommonStockCapitalSharesAmountAvailableForFutureIssuance | 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 | 2018-12-31 | 2017-12-31 |
| Value | 25.9 | 26.2 | 26.3 | 26.3 | 0.274 | 0.274 | 0.263 | 0.273 | 0.261 |
| Percentage of CommonStockOutstandingPercentageOfSharesHeld | 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 | 2018-12-31 | 2017-12-31 |
| Value | 14.1 | 14.3 | 14.3 | 14.2 | 0.149 | 0.149 | 0.136 | 0.14 | 0.121 |
| Percentage of CommonStockOutstandingPercentageOfSharesHeld | 54.4 | 54.6 | 54.4 | 54.0 | 54.4 | 54.4 | 51.7 | 51.3 | 46.4 |
| Period End | 2021-07-31 |
| Value | 5600000.0 |
| Percentage of DebtIssuanceCostsUnderwritingFees | 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 | 14 | 4.317 | 4.864 | 5.352 | 5.662 | 6.18 | 6.84 |
| Percentage of DeferredCostAndOtherIntangiblesNet | 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 |
| Value | 11 | 10 | 10 | 9.524 | 11 | 10 | 10 | 10 | 11 | 12 | 12 | 10 | 9.393 | 10 | 10 | 20 | 17 | 15 | 12 | 34 | 37 | 24 | 25 | 29 | 26 | 22 | 32 | 27 | 22 | 18 | 15 |
| Percentage of DeferredCostsAndIntangibleAssetsAccumulatedAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 26 | 15 | 15 | 14 | 16 | 16 | 17 | 18 | 20 | 23 | 25 | 24 | 22 | 23 | 23 | 33 | 31 | 25 | 23 | 49 | 53 | 51 | 92 | 100 | 88 | 87 | 86 | 70 | 52 | 37 | 35 |
| Percentage of DeferredCostsAndIntangibleAssetsGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 14 | 4.317 | 4.864 | 5.352 | 5.662 | 6.18 | 6.84 | 7.777 | 8.986 | 10 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 10 | 11 | 15 | 16 | 26 | 66 | 70 | 62 | 65 | 54 | 42 | 30 | 18 | 20 |
| Percentage of DeferredCostsAndIntangibleAssetsNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 779000.0 |
| Percentage of DeferredFinancingCostsAmortizationExpenseAfterYearFour | 100.0 |
| Period End | 2020-12-31 |
| Value | 1964000.0 |
| Percentage of DeferredFinancingCostsAmortizationExpenseFiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths | 100.0 |
| Period End | 2021-06-30 |
| Value | 1367000.0 |
| Percentage of DeferredFinancingCostsAmortizationExpenseRemainderOfFiscalYear | 100.0 |
| Period End | 2021-03-31 | 2020-09-30 |
| Value | 1479000.0 | 495000.0 |
| Percentage of DeferredFinancingCostsAmortizationExpenseRemainderofFiscalYear | 100.0 | 100.0 |
| Period End | 2021-06-30 |
| Value | 2709000.0 |
| Percentage of DeferredFinancingCostsAmortizationExpenseYearFour | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 |
| Value | 2709000.0 | 968000.0 | 1964000.0 |
| Percentage of DeferredFinancingCostsAmortizationExpenseYearOne | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 |
| Value | 2717000.0 |
| Percentage of DeferredFinancingCostsAmortizationExpenseYearThree | 100.0 |
| Period End | 2021-06-30 | 2020-12-31 | 2020-09-30 |
| Value | 2709000.0 | 968000.0 | 968000.0 |
| Percentage of DeferredFinancingCostsAmortizationExpenseYearTwo | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 1932000.0 |
| Percentage of DeferredLeasingFeesAmortizationExpenseNextTwelveMonths | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 |
| Value | 1370000.0 | 1797000.0 | 832000.0 |
| Percentage of DeferredLeasingFeesAmortizationExpenseRemainderofFiscalYear | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 |
| Value | 375000.0 | 73000.0 | 1093000.0 |
| Percentage of DeferredLeasingFeesAmortizationExpenseYearOne | 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 |
| Value | 182 | 177 | 163 | 135 | 141 | 151 | 202 | 182 | 181 | 145 | 146 | 251 | 246 | 241 | 171 | 149 | 137 | 142 | 133 | 120 | 144 | 142 | 121 | 118 | 118 | 114 | 118 | 60 | 56 | 24 | 39 |
| Percentage of DepositsPrepaidExpenseAndOtherAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 |
| Value | 182 | 177 | 163 | 135 | 141 | 151 | 201 | 182 | 181 | 145 | 145 | 248 | 246 | 241 | 171 | 149 | 128 |
| Percentage of DepositsPrepaidExpenseAndOtherAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 99.9 | 100.0 | 99.9 | 99.8 | 99.8 | 99.0 | 100.0 | 100.0 | 100.0 | 99.9 | 96.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2016-12-31 |
| Value | 0.188 | 0.105 | 13 | 0.0 | 0.0 | 13 | 0.059 | 26 | 12 | 25 | 24 | 27 | 26 | 0.0 |
| Percentage of DistributionsPayable | 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 | 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 |
| Value | 57 | 62 | 51 | 45 | 54 | 66 | 54 | 40 | 43 | 45 | 44 | 40 | 45 | 49 | 33 |
| Percentage of EscrowDepositsPrepaidExpensesAndOtherAssets | 100.0 | 100.0 | 100.0 | 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 | 2020-12-31 |
| Value | 14 | 24 |
| Percentage of ExpectedProceedsFromSaleOfPropertyHeldForSale | 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 |
| Value | 20 | 24 | 26 | 28 | 25 | 57 | 51 | 36 | 53 | 13 | 23 | 24 | 5.1 | 7.0 | 17 | 20 | 11 | 6.6 |
| Percentage of ExpectedProceedsfromSaleofPropertyHeldforsale | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 779000.0 |
| Percentage of FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 |
| Value | 2440 | 1821 | 1832 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 30.0 |
| Percentage of PercentageOfVotingInterests | 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 | 2017-12-31 |
| Value | 322 | 251 | 239 | 208 | 215 | 161 | 131 | 106 | 91 | 64 | 56 | 12 |
| Percentage of RealEstateInvestmentPropertyPropertiesUnderDevelopment | 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 | 2017-12-31 |
| Value | 647 | 554 | 510 | 449 | 453 | 407 | 355 | 262 | 235 | 205 | 153 | 51 |
| Percentage of RealEstateInvestmentPropertyPropertiesUnderDevelopmentAndUndevelopedLand | 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 | 2017-12-31 |
| Value | 647 | 554 | 510 | 449 | 453 | 407 | 355 | 262 | 235 | 205 | 153 | 51 |
| Percentage of RealEstateInvestmentPropertyPropertiesUnderDevelopmentAndUndevelopedLand | 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 | 2017-12-31 |
| Value | 325 | 303 | 270 | 241 | 237 | 246 | 224 | 155 | 144 | 140 | 97 | 39 |
| Percentage of RealEstateInvestmentPropertyUndevelopedLand | 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 | 494 | 494 | 494 | 494 | 493 | 493 | 493 | 493 | 493 | 497 | 497 |
| Percentage of UnsecuredDebtFairValueDisclosure | 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 | 2018-12-31 |
| Value | 561 | 549 | 575 | 568 | 534 | 508 | 531 | 539 | 517 | 479 |
| Percentage of UnsecuredDebtFairValueDisclosure | 113.6 | 111.2 | 116.4 | 115.1 | 108.3 | 103.0 | 107.8 | 109.4 | 105.0 | 96.4 |
| 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 |
| Value | 395 | 395 | 395 | 395 | 395 | 395 | 394 | 394 | 394 | 397 | 0.0 |
| Percentage of UnsecuredDebtFairValueDisclosure | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 80.0 | 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 | 465 | 456 | 482 | 477 | 452 | 392 | 446 | 455 | 434 | 0.0 |
| Percentage of UnsecuredDebtFairValueDisclosure | 94.0 | 92.2 | 97.6 | 96.5 | 91.6 | 79.4 | 90.5 | 92.4 | 88.1 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 889 | 888 |
| Percentage of UnsecuredDebtFairValueDisclosure | 180.0 | 180.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 1057 | 978 |
| Percentage of UnsecuredDebtFairValueDisclosure | 213.9 | 198.3 |
| 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 |
| Value | 890 | 890 | 889 | 889 | 889 | 888 | 888 | 888 | 887 | 895 | 497 | 497 | 497 | 497 | 0.0 |
| Percentage of UnsecuredDebtFairValueDisclosure | 180.0 | 180.0 | 180.0 | 180.0 | 180.0 | 180.0 | 180.0 | 180.0 | 180.0 | 180.0 | 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 | 2018-12-31 |
| Value | 1027 | 1005 | 1057 | 1045 | 987 | 900 | 978 | 995 | 952 | 479 |
| Percentage of UnsecuredDebtFairValueDisclosure | 207.6 | 203.4 | 213.9 | 211.6 | 199.9 | 182.4 | 198.3 | 201.8 | 193.1 | 96.4 |
| Period End | 2020-08-05 | 2020-05-06 | 2020-02-26 | 2019-11-06 | 2019-07-31 | 2019-04-30 | 2019-02-20 | 2018-10-31 | 2018-08-01 | 2018-05-02 | 2018-02-21 | 2017-11-01 | 2017-08-02 | 2017-05-03 | 2017-02-22 | 2016-11-02 | 2016-08-03 | 2016-05-04 | 2016-02-24 | 2015-11-03 | 2015-08-05 | 2015-05-06 | 2015-02-26 | 2014-11-11 | 2014-08-04 | 2014-05-09 | 2014-03-24 | 2013-11-13 | 2013-08-22 |
| Value | 300 | 300 | 300 | 300 | 299 | 299 | 296 | 295 | 295 | 295 | 286 | 286 | 259 | 258 | 242 | 237 | 237 | 237 | 205 | 207 | 210 | 210 | 210 | 210 | 184 | 184 | 184 | 184 | 184 |
| Percentage of EntityCommonStockSharesOutstanding | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 3092 | 3062 | 3041 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 3092 | 3062 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 191 | 187 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 6.2 | 6.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 41 | 35 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 1.3 | 1.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 7.824 | 7.748 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 0.3 | 0.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 82 | 82 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 2.7 | 2.7 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 286 | 283 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 9.3 | 9.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 236 | 234 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 7.7 | 7.7 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 142 | 140 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 4.6 | 4.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 289 | 286 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 9.3 | 9.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 184 | 182 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 6.0 | 6.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 53 | 52 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 1.7 | 1.7 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 72 | 72 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 2.4 | 2.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 174 | 172 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 5.6 | 5.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 297 | 294 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 9.6 | 9.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 61 | 60 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 2.0 | 2.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 17 | 17 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 0.6 | 0.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 22 | 21 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 0.7 | 0.7 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 17 | 16 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 0.6 | 0.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 3.602 | 3.581 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 0.1 | 0.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 184 | 182 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 6.0 | 6.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 46 | 46 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 1.5 | 1.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 56 | 55 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 1.8 | 1.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 24 | 24 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 0.8 | 0.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 213 | 211 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 6.9 | 6.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 158 | 157 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 5.1 | 5.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 54 | 59 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 1.8 | 1.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 42 | 41 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 1.4 | 1.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 28 | 28 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 0.9 | 0.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 46 | 45 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 1.5 | 1.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 12 | 11 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 0.4 | 0.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 43 | 42 |
| Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 1.4 | 1.4 |
| Period End | 2020-12-31 |
| Value | 10700 |
| Percentage of RealEstateFederalIncomeTaxBasis | 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 | 2012-12-31 |
| Value | 366 | 307 | 298 | 324 | 287 | 241 | 243 | 295 | 301 | 266 | 219 | 305 | 282 | 262 | 222 | 263 | 222 | 199 | 177 | 241 | 215 | 200 | 154 | 234 | 158 | 141 | 149 | 135 | 117 | 112 | 103 | 91 | 75 | 11 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 |
| Value | 366 | 307 | 298 | 324 | 287 | 241 | 243 | 295 | 301 | 266 | 219 | 305 | 282 | 262 | 222 | 263 | 177 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2012-12-31 |
| Value | 4.598 | 0.194 | 0.432 | 1.598 | 1.484 | 1.274 | 5.037 | 0.41 | 1.75 | 1.805 | 0.195 | 0.151 | 0.194 | 0.272 | 1.726 | 1.091 | 0.897 | 0.25 | 0.009 | 0.0 | 0.288 | 0.139 | 1.173 | 0.396 | 0.092 | 0.149 | 4.925 | 0.146 | 1.402 | 1.893 | 0.901 | 6.064 | 12 | 0.259 |
| Percentage of AccountsPayableCurrentAndNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 2018-12-31 |
| Value | 50 | 49 | 41 | 46 | 32 | 29 | 29 | 36 | 29 |
| Percentage of AccountsReceivableNet | 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 | 2018-12-31 |
| Value | 50 | 49 | 41 | 46 | 32 | 29 | 29 | 36 | 29 |
| Percentage of AccountsReceivableNet | 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 | 2012-12-31 |
| Value | 109 | 78 | 48 | 132 | 100 | 72 | 44 | 123 | 93 | 69 | 40 | 115 | 90 | 67 | 47 | 110 | 86 | 63 | 46 | 108 | 85 | 64 | 46 | 74 | 55 | 45 | 49 | 56 | 38 | 30 | 28 | 30 | 20 | 4.76 |
| Percentage of AccrualForTaxesOtherThanIncomeTaxesCurrentAndNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 23 | 24 | 24 | 21 | 23 | 22 | 19 | 22 | 23 | 24 | 22 | 23 | 24 | 21 | 20 | 20 | 21 | 22 | 19 | 19 | 15 | 16 | 16 | 6.613 |
| Percentage of AccruedRentCurrentAndNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2012-12-31 |
| Value | 54 | 41 | 42 | 18 | 16 | 12 | 20 | 15 | 15 | 10 | 18 | 20 | 20 | 29 | 17 | 17 | 13 | 9.113 | 9.899 | 12 | 10 | 10 | 11 | 16 | 16 | 23 | 23 | 11 | 12 | 15 | 16 | 15 | 12 | 3.059 |
| Percentage of ConstructionPayableCurrentAndNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 3456 | 2922 | 2848 | 2853 | 2989 | 2970 | 2870 | 2876 | 2881 | 2986 | 2842 | 2712 | 2717 | 2871 | 2517 | 2382 | 2480 | 2999 | 2981 | 2988 | 3166 | 3469 | 2580 |
| 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 |
| 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 |
| Value | 620 | 80 | 130 | 105 | 0.0 | 0.0 | 0.0 | 0.0 | 250 | 0.0 | 0.0 | 0.0 | 140 | 0.0 | 92 | 0.0 | 0.0 |
| Percentage of DebtInstrumentCarryingAmount | 17.9 | 2.7 | 4.3 | 3.5 | 0.0 | 0.0 | 0.0 | 0.0 | 8.8 | 0.0 | 0.0 | 0.0 | 5.6 | 0.0 | 3.7 | 0.0 | 0.0 |
| Period End | 2020-07-31 |
| Value | 105 |
| Percentage of DebtInstrumentCarryingAmount | 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 |
| Value | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 0.0 |
| Percentage of DebtInstrumentCarryingAmount | 14.5 | 17.1 | 17.6 | 17.5 | 16.7 | 16.8 | 17.4 | 17.4 | 17.4 | 16.7 | 17.6 | 18.4 | 18.4 | 17.4 | 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 |
| Value | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 0.0 |
| Percentage of DebtInstrumentCarryingAmount | 11.6 | 13.7 | 14.0 | 14.0 | 13.4 | 13.5 | 13.9 | 13.9 | 13.9 | 13.4 | 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 | 2016-12-31 |
| Value | 517 | 519 | 520 | 522 | 523 | 525 | 526 | 527 | 529 | 530 | 532 | 533 | 534 | 536 | 537 | 539 | 540 | 542 | 543 |
| Percentage of DebtInstrumentCarryingAmount | 15.0 | 17.8 | 18.3 | 18.3 | 17.5 | 17.7 | 18.3 | 18.4 | 18.4 | 17.8 | 18.7 | 19.7 | 19.7 | 18.7 | 21.4 | 22.6 | 21.8 | 18.1 | 18.2 |
| 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 |
| Value | 492 | 493 | 495 | 496 | 497 | 499 | 501 | 502 | 504 | 505 | 506 | 508 | 509 | 510 | 512 | 513 | 514 | 516 | 517 |
| Percentage of DebtInstrumentCarryingAmount | 14.2 | 16.9 | 17.4 | 17.4 | 16.7 | 16.8 | 17.5 | 17.5 | 17.5 | 16.9 | 17.8 | 18.7 | 18.7 | 17.8 | 20.3 | 21.5 | 20.8 | 17.2 | 17.4 |
| 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 |
| Value | 476 | 478 | 479 | 481 | 482 | 484 | 485 | 487 | 488 | 489 | 491 | 492 | 493 | 495 | 496 | 497 | 499 | 500 | 501 |
| Percentage of DebtInstrumentCarryingAmount | 13.8 | 16.4 | 16.9 | 16.9 | 16.2 | 16.3 | 16.9 | 16.9 | 17.0 | 16.4 | 17.3 | 18.2 | 18.2 | 17.2 | 19.7 | 20.9 | 20.1 | 16.7 | 16.8 |
| 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 |
| Value | 449 | 450 | 452 | 453 | 454 | 456 | 457 | 458 | 459 | 460 | 462 | 463 | 464 | 465 | 467 | 468 | 469 | 470 | 472 |
| Percentage of DebtInstrumentCarryingAmount | 13.0 | 15.4 | 15.9 | 15.9 | 15.2 | 15.4 | 15.9 | 15.9 | 16.0 | 15.4 | 16.3 | 17.1 | 17.1 | 16.2 | 18.6 | 19.7 | 18.9 | 15.7 | 15.8 |
| 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 |
| Value | 1936 | 1942 | 1948 | 1953 | 1959 | 1965 | 1970 | 1976 | 1981 | 1986 | 1992 | 1997 | 2002 | 2008 | 2013 | 2018 | 2024 | 2485 | 2491 |
| Percentage of DebtInstrumentCarryingAmount | 56.0 | 66.5 | 68.4 | 68.5 | 65.5 | 66.2 | 68.7 | 68.7 | 68.8 | 66.5 | 70.1 | 73.6 | 73.7 | 69.9 | 80.0 | 84.7 | 81.6 | 82.8 | 83.6 |
| Period End | 2021-07-31 |
| Value | 450 |
| Percentage of DebtInstrumentFaceAmount | 100.0 |
| Period End | 2021-07-31 |
| Value | 300 |
| Percentage of DebtInstrumentFaceAmount | 66.7 |
| 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 | 2015-12-31 |
| Value | 512 | 513 | 515 | 516 | 517 | 518 | 519 | 520 | 521 | 530 | 532 | 533 | 534 | 536 | 537 | 539 | 540 | 542 | 543 | 544 | 549 |
| Percentage of DebtInstrumentFairValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 |
| Value | 525 | 527 | 529 | 531 | 532 | 532 | 534 | 534 | 535 | 534 |
| Percentage of DebtInstrumentFairValue | 102.5 | 102.6 | 102.8 | 102.9 | 102.9 | 102.6 | 102.9 | 102.6 | 102.7 | 100.5 |
| 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 | 2015-12-31 |
| Value | 487 | 489 | 490 | 491 | 492 | 493 | 495 | 496 | 497 | 505 | 506 | 508 | 509 | 510 | 512 | 513 | 514 | 516 | 517 | 519 | 523 |
| Percentage of DebtInstrumentFairValue | 95.1 | 95.2 | 95.1 | 95.1 | 95.1 | 95.2 | 95.3 | 95.3 | 95.3 | 95.2 | 95.2 | 95.2 | 95.2 | 95.2 | 95.2 | 95.2 | 95.2 | 95.2 | 95.3 | 95.3 | 95.3 |
| 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 | 2018-12-31 |
| Value | 500 | 502 | 504 | 506 | 507 | 508 | 510 | 512 | 512 | 511 |
| Percentage of DebtInstrumentFairValue | 97.6 | 97.8 | 97.9 | 98.0 | 98.1 | 98.1 | 98.3 | 98.5 | 98.2 | 96.1 |
| 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 | 2015-12-31 |
| Value | 472 | 473 | 475 | 476 | 477 | 478 | 479 | 480 | 481 | 489 | 491 | 492 | 493 | 495 | 496 | 497 | 499 | 500 | 501 | 503 | 507 |
| Percentage of DebtInstrumentFairValue | 92.2 | 92.2 | 92.2 | 92.3 | 92.2 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.3 | 92.4 |
| 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 | 483 | 485 | 488 | 490 | 491 | 489 | 491 | 492 | 493 | 494 |
| Percentage of DebtInstrumentFairValue | 94.3 | 94.5 | 94.7 | 94.9 | 94.9 | 94.4 | 94.6 | 94.7 | 94.6 | 93.0 |
| 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 | 444 | 445 | 446 | 447 | 448 | 449 | 450 | 451 | 452 | 460 | 462 | 463 | 464 | 465 | 467 | 468 | 469 | 470 | 472 | 473 | 476 |
| Percentage of DebtInstrumentFairValue | 86.7 | 86.7 | 86.7 | 86.7 | 86.7 | 86.7 | 86.8 | 86.8 | 86.8 | 86.8 | 86.9 | 86.9 | 86.9 | 86.9 | 86.9 | 86.9 | 86.9 | 86.9 | 86.9 | 86.9 | 86.9 |
| 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 | 2018-12-31 |
| Value | 458 | 460 | 461 | 462 | 464 | 466 | 466 | 468 | 467 | 467 |
| Percentage of DebtInstrumentFairValue | 89.5 | 89.5 | 89.5 | 89.6 | 89.7 | 89.9 | 89.8 | 89.9 | 89.6 | 87.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 1927 | 1945 |
| Percentage of DebtInstrumentFairValue | 374.1 | 374.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 1983 | 2002 |
| Percentage of DebtInstrumentFairValue | 384.8 | 385.5 |
| 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 | 2015-12-31 |
| Value | 1917 | 1922 | 1927 | 1931 | 1935 | 1940 | 1945 | 1949 | 1953 | 1986 | 1992 | 1997 | 2002 | 2008 | 2013 | 2018 | 2024 | 2485 | 2491 | 2498 | 2530 |
| Percentage of DebtInstrumentFairValue | 374.0 | 374.1 | 374.1 | 374.1 | 374.1 | 374.3 | 374.4 | 374.4 | 374.4 | 374.3 | 374.4 | 374.4 | 374.4 | 374.4 | 374.4 | 374.4 | 374.4 | 458.4 | 458.4 | 458.5 | 460.8 |
| 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 | 2018-12-31 |
| Value | 1968 | 1976 | 1983 | 1990 | 1995 | 1996 | 2002 | 2007 | 2009 | 2008 |
| Percentage of DebtInstrumentFairValue | 383.8 | 384.5 | 384.8 | 385.4 | 385.6 | 385.0 | 385.5 | 385.6 | 385.2 | 377.3 |
| 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 |
| Value | 4.08 | 4.08 | 4.08 | 0.0408 | 0.0408 | 0.0408 | 0.0408 | 0.0408 | 0.0408 | 0.0408 | 0.0408 | 0.0408 | 0.0408 |
| Percentage of DebtInstrumentInterestRateEffectivePercentage | 100.0 | 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 | 3.416 | 3.537 | 3.658 | 3.78 | 3.9 | 4.022 | 4.143 | 4.264 | 4.385 | 4.506 | 2.546 | 2.751 | 3.092 | 3.412 | 0.895 | 1.156 | 1.414 | 1.656 | 1.883 |
| Percentage of DebtInstrumentUnamortizedDiscount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2021-07-31 |
| Value | 12 |
| Percentage of DebtInstrumentUnamortizedDiscountPremiumNet | 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 | 2016-12-31 | 2015-12-31 |
| Value | 22 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 6.552 | 12 |
| Percentage of DebtIssuanceCostsLineOfCreditArrangementsGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 12 | 2.447 | 2.932 | 3.427 |
| Percentage of DebtIssuanceCostsLineOfCreditArrangementsNet | 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 |
| Value | 3.677 | 3.889 | 3.782 | 3.632 | 3.506 | 3.607 | 3.738 | 5.301 | 7.521 | 9.741 | 11 | 11 | 9.171 | 9.753 | 7.03 | 12 | 10 | 8.952 | 7.47 | 14 | 12 | 10 | 8.692 | 14 | 12 | 12 | 18 | 16 | 14 | 13 | 12 |
| Percentage of DeferredCostsLeasingGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1745000.0 | 1870000.0 | 1932000.0 | 1925000.0 |
| Percentage of DeferredCostsLeasingNet | 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 |
| Value | 24 | 25 | 27 | 28 | 30 | 31 | 33 | 34 | 36 | 38 | 36 | 37 | 39 | 41 | 38 | 39 | 40 | 49 | 51 | 53 | 52 | 54 | 56 |
| Percentage of DeferredFinanceCostsNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2021-07-31 |
| Value | 1.1 |
| Percentage of DeferredFinanceCostsNet | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 4000000.0 | 9200000.0 |
| Percentage of DerivativeFairValueOfDerivativeNet | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2017-12-31 |
| Value | 400 | 350 |
| Percentage of DerivativeNotionalAmount | 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 | 2016-12-31 |
| Value | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 28 | 25 | 25 | 25 | 25 | 30 |
| Percentage of DueFromAffiliates | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2020-06-30 | 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 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 4834000.0 | 0 | 0 | 4629000.0 | 273000.0 | 4824000.0 | 4944000.0 | 4967000.0 | 4784000.0 | 4571000.0 | 2001000.0 | 4700000.0 | 0 | 4093000.0 | 0 |
| Percentage of DueToAffiliateCurrentAndNoncurrent | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 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 | 2016-12-31 |
| Value | 4834000.0 | 0 | 0 | 4629000.0 | 273000.0 | 4824000.0 | 4944000.0 | 4967000.0 | 4784000.0 | 4571000.0 | 2001000.0 | 4720000.0 | 0 |
| Percentage of DueToAffiliateCurrentAndNoncurrent | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.4 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 4800000.0 | 4600000.0 | 5000000.0 |
| Percentage of DueToAffiliateCurrentAndNoncurrent | 99.3 | 99.4 | 100.7 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 4800000.0 | 4600000.0 | 5000000.0 |
| Percentage of DueToAffiliateCurrentAndNoncurrent | 99.3 | 99.4 | 100.7 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2014-12-31 |
| Value | 0.2 | 0.6 | 1.4 | 2.9 | 4.1 | 7.1 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized | 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 | 2014-12-31 |
| Value | 10 | 9.3 | 5.6 | 3.7 | 1.3 | 1.1 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized | 5150.0 | 1550.0 | 400.0 | 127.6 | 31.7 | 15.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 |
| Value | 20.0 | 20.0 | 20.0 | 20.0 | 0.2 |
| Percentage of EquityMethodInvestmentOwnershipPercentage | 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 |
| Value | 103 | 100 | 93109 | 74 | 69 | 67 |
| Percentage of EquityMethodInvestments | 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 |
| Value | 23 | 26 | 26020 | 26 | 27 | 29 |
| Percentage of EquityMethodInvestments | 22.8 | 26.3 | 27.9 | 35.8 | 39.3 | 43.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 50 | 43 | 32977 | 19 | 2.739 | 0.0 |
| Percentage of EquityMethodInvestments | 49.1 | 43.0 | 35.4 | 25.7 | 3.9 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 29 | 30 | 34112 | 28 | 39 | 33 |
| Percentage of EquityMethodInvestments | 28.1 | 30.6 | 36.6 | 38.4 | 56.7 | 49.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2018-12-31 |
| Value | 3084000.0 | 1041000.0 | 3896000.0 | 3057000.0 | 3908000.0 | 7652000.0 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 2.737 | 3.276 | 1.327 | 3.172 | 1.643 | 3.5 | 5.54 | 2.826 | 4.573 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 2709000.0 | 968000.0 | 968000.0 | 968000.0 | 968000.0 | 1964000.0 | 1964000.0 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 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 | 2717000.0 | 968000.0 | 968000.0 | 1964000.0 | 1964000.0 | 1964000.0 | 1965000.0 | 2101000.0 | 2101000.0 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2020-12-31 | 2020-09-30 | 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 | 2709000.0 | 968000.0 | 968000.0 | 2040000.0 | 1964000.0 | 3202000.0 | 2554000.0 | 2181000.0 | 2101000.0 | 5579000.0 | 3537000.0 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo | 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 | 2016-12-31 |
| Value | 5124 | 4938 | 4928 | 4908 | 4484 | 4479 | 4474 | 4463 | 4450 | 4398 | 4390 | 4405 | 4395 | 4205 | 4248 | 4008 | 3357 |
| Percentage of GeneralPartnersCapitalAccount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 |
| Value | 371 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 743 | 901 | 901 | 1095 | 834 |
| Percentage of GeneralPartnersCapitalAccount | 7.3 | 17.3 | 17.3 | 17.4 | 19.1 | 19.1 | 19.1 | 19.1 | 19.2 | 19.4 | 19.5 | 19.4 | 16.9 | 21.4 | 21.2 | 27.3 | 24.9 |
| 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 | 2018-12-31 |
| Value | 59 | 47 | 36 | 36 | 34 | 23 | 14 | 9.9 | 5.1 |
| Percentage of GuaranteeObligationsCurrentCarryingValue | 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 | 139 | 116 | 85 | 85 |
| Percentage of GuaranteeObligationsMaximumExposure | 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 | 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 | 5.9 | 2.5 | 0.8 | 4.8 | 2.7 | 2.7 | 4.9 | 4.9 | 4.9 | 5.4 | 4.9 | 4.9 | 8.9 | 11 |
| Percentage of InsuranceSettlementsReceivable | 100.0 | 100.0 | 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 | 2018-12-31 |
| Value | 23 | 12 | 23 | 12 | 23 | 12 | 23 | 12 | 24 | 16 |
| Percentage of InterestPayableCurrentAndNoncurrent | 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 | 1000000.0 |
| Percentage of InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet | 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 | 2012-12-31 |
| Value | 8548 | 8301 | 8163 | 8022 | 7904 | 7814 | 7691 | 7612 | 7566 | 7561 | 7483 | 7385 | 7276 | 7286 | 7303 | 7020 | 6815 | 6672 | 6614 | 6542 | 6450 | 6434 | 5469 | 5401 | 5263 | 5117 | 4808 | 4296 | 3758 | 3507 | 3188 | 2896 | 2472 | 411 |
| Percentage of InvestmentBuildingAndBuildingImprovements | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 |
| Value | 8548 | 8301 | 8163 | 8022 | 7904 | 7814 | 7691 | 7612 | 7566 | 7561 | 7483 | 7385 | 7276 | 7286 | 7303 | 7020 | 6614 |
| Percentage of InvestmentBuildingAndBuildingImprovements | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 2104000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2019-03-31 | 2018-12-31 |
| Value | 646 | 579 | 582 | 631 | 460 | 451 |
| Percentage of LessorOperatingLeasePaymentsToBeReceived | 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 | 221 | 85 | 550 | 381 |
| Percentage of LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2019-03-31 | 2018-12-31 |
| Value | 413 | 492 | 232 | 414 | 446 |
| Percentage of LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2019-03-31 | 2018-12-31 |
| Value | 49000.0 | 13000.0 | 130000.0 | 82000.0 | 1235000.0 | 251000.0 |
| Percentage of LessorOperatingLeasePaymentsToBeReceivedThreeYears | 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 | 2019-03-31 | 2018-12-31 |
| Value | 10 | 2.417 | 32 | 17 | 45 | 4.857 |
| Percentage of LessorOperatingLeasePaymentsToBeReceivedTwoYears | 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 | 2018-12-31 |
| Value | 1200000.0 | 1500000.0 | 1500000.0 | 1500000.0 | 3700000.0 | 3700000.0 | 6200000.0 | 4800000.0 | 1100000.0 |
| Percentage of LettersOfCreditOutstandingAmount | 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 | 2016-12-31 |
| Value | 675 | 677 | 682 | 684 | 683 | 683 | 682 | 680 | 681 | 714 | 720 | 720 | 720 | 725 | 727 | 736 | 746 |
| Percentage of LimitedPartnersCapitalAccount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2020-06-30 | 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 | 2016-12-31 |
| Value | 620 | 80 | 130 | 105 | 0.0 | 0.0 | 0.0 | 0.0 | 250 | 0.0 | 0.0 | 0.0 | 140 | 0.0 | 0.0 |
| Percentage of LineOfCredit | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 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 |
| Value | 620 | 80 | 130 | 105 | 0.0 | 0.0 | 0.0 | 0.0 | 250 | 0.0 | 0.0 | 0.0 | 140 | 0.0 | 92 | 0.0 | 0.0 |
| Percentage of LineOfCredit | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-07-31 | 2021-04-30 |
| Value | 20 | 100 |
| Percentage of LineOfCredit | 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 | 2017-06-30 | 2016-12-31 | 2016-09-30 | 2015-12-31 |
| Value | 620 | 80 | 130 | 105 | 0.0 | 0.0 | 0.0 | 0.0 | 250 | 0.0 | 0.0 | 0.0 | 140 | 92 | 0.0 | 75 | 0.0 |
| Percentage of LinesOfCreditFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 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 | 2018-12-31 |
| Value | 620 | 80 | 130 | 105 | 0.0 | 0.0 | 0.0 | 250 |
| Percentage of LinesOfCreditFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2020-09-30 |
| Value | 2900000.0 |
| Percentage of LitigationReserve | 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 | 3428 | 2892 | 2817 | 2821 | 2954 | 2934 | 2833 | 2837 | 2841 | 2982 | 2839 | 2709 | 2713 | 2866 | 2513 | 2378 | 2475 | 2993 | 2974 | 2980 | 2580 |
| Percentage of LongTermDebtFairValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 |
| Value | 3615 | 3062 | 3040 | 3035 | 3112 | 3002 | 2981 | 3003 | 2962 | 2837 |
| Percentage of LongTermDebtFairValue | 105.5 | 105.9 | 107.9 | 107.6 | 105.3 | 102.3 | 105.2 | 105.9 | 104.3 | 99.9 |
| Period End | 2020-12-31 |
| Value | 1821 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 20 | 100 | 20 | 20 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 10 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 10 | 10 | 954 | 954 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 953 | 953 | 20 | 20 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 |
| Value | 10 | 15 | 5.179 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 0.2 | 0.002 | 0.003 |
| Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners | 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 | 2018-12-31 |
| Value | 0.2 | 0.2 | 0.2 | 0.2 | 0.002 | 0.002 | 0.002 | 0.002 | 0.003 |
| Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 13.9 | 0.146 | 0.154 |
| Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners | 6950.0 | 7300.0 | 5133.3 |
| 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 | 2018-12-31 |
| Value | 13.6 | 13.8 | 13.9 | 14.0 | 0.146 | 0.146 | 0.146 | 0.146 | 0.154 |
| Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners | 0.0 | 0.0 | 6950.0 | 0.0 | 0.0 | 0.0 | 7300.0 | 0.0 | 5133.3 |
| 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 | 2018-12-31 |
| Value | 34 | 34 | 35 | 35 | 35 | 35 | 36 | 36 | 35 | 6.012 |
| Percentage of NotesReceivableNet | 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 |
| Value | 2.9 | 3.3 |
| Percentage of OperatingLeaseWeightedAverageDiscountRatePercent | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 60 | 188 | 275 |
| Percentage of OperatingLossCarryforwards | 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 | 2012-12-31 |
| Value | 34 | 37 | 36 | 47 | 33 | 33 | 32 | 34 | 29 | 47 | 41 | 39 | 38 | 37 | 31 | 40 | 26 | 32 | 31 | 31 | 33 | 41 | 26 | 89 | 33 | 24 | 28 | 27 | 27 | 23 | 21 | 17 | 15 | 1.473 |
| Percentage of OtherAccruedLiabilitiesCurrentAndNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 |
| Value | 6173 | 6486 | 6472 | 6454 | 6029 | 6024 | 6018 | 6007 | 5995 | 5975 | 5973 | 5989 | 5868 | 5842 | 5877 | 5839 | 4939 |
| Percentage of PartnersCapital | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 6173 | 6486 | 6472 | 6454 | 6029 | 6024 | 6018 | 6007 | 5995 | 5975 | 5973 | 5989 | 5868 | 5840 | 5875 | 5838 | 4937 | 3935 | 4169 |
| Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 2.38 | 15 | 6.86 | 7.101 | 7.342 | 7.582 | 7.823 | 8.064 | 8.305 | 8.545 | 8.786 | 9.026 | 9.267 | 9.508 | 0.075 | 0.0 | 0.095 | -0.102 | -0.229 |
| Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest | 0.0 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 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 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 5124 | 4938 | 4928 | 4908 | 4484 | 4479 | 4474 | 4463 | 4450 | 4398 | 4390 | 4405 | 4395 | 4205 | 4248 | 4008 | 3357 | 2907 | 3098 |
| Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest | 83.0 | 76.1 | 76.2 | 76.0 | 74.4 | 74.4 | 74.3 | 74.3 | 74.2 | 73.6 | 73.5 | 73.6 | 74.9 | 72.0 | 72.3 | 68.7 | 68.0 | 73.9 | 74.3 |
| 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 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 675 | 677 | 682 | 684 | 683 | 683 | 682 | 680 | 681 | 714 | 720 | 720 | 720 | 725 | 727 | 736 | 746 | 217 | 224 |
| Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest | 10.9 | 10.4 | 10.5 | 10.6 | 11.3 | 11.3 | 11.3 | 11.3 | 11.4 | 12.0 | 12.1 | 12.0 | 12.3 | 12.4 | 12.4 | 12.6 | 15.1 | 5.5 | 5.4 |
| 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 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 371 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 854 | 743 | 901 | 901 | 1095 | 834 | 352 | 352 |
| Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest | 6.0 | 13.2 | 13.2 | 13.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.3 | 14.3 | 14.3 | 14.3 | 12.7 | 15.4 | 15.3 | 18.8 | 16.9 | 8.9 | 8.4 |
| Period End | 2021-06-30 |
| Value | 25.0 |
| Percentage of PreferredStockLiquidationPreference | 100.0 |
| Period End | 2021-06-30 |
| Value | 25.0 |
| Percentage of PreferredStockLiquidationPreference | 100.0 |
| Period End | 2021-05-06 |
| Value | 25.0 |
| Percentage of PreferredStockLiquidationPreference | 0.0 |
| Period End | 2021-05-06 |
| Value | 25.0 |
| Percentage of PreferredStockLiquidationPreference | 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 |
| Value | 385 | 883 | 883 | 883 | 883 | 883 | 883 | 883 | 883 | 883 | 883 | 883 | 768 | 987 | 986 |
| Percentage of PreferredStockLiquidationPreferenceValue | 100.0 | 100.0 | 100.0 | 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 | 2017-12-31 |
| Value | 115 | 115 | 115 | 115 | 115 | 115 | 115 | 115 | 115 | 115 | 115 | 115 | 0.0 |
| Percentage of PreferredStockLiquidationPreferenceValue | 29.9 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 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 |
| Value | 154000.0 | 354000.0 | 354000.0 | 354000.0 | 354000.0 | 354000.0 | 354000.0 | 354000.0 | 354000.0 | 354000.0 | 354000.0 | 354000.0 | 308000.0 | 384000.0 | 384000.0 | 478000.0 | 432000.0 | 370000.0 | 370000.0 | 370000.0 | 370000.0 | 171000.0 | 171000.0 | 171000.0 | 171000.0 | 171000.0 | 171000.0 | 171000.0 | 171000.0 | 95000.0 | 91000.0 |
| Percentage of PreferredStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1773 | 1493 | 1176 | 939 | 666 | 416 | 206 | 62 | 2.132 | 0.021 |
| Percentage of RealEstateAccumulatedDepreciation | 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 | 1754 | 1462 | 1176 | 939 | 666 |
| Percentage of RealEstateAccumulatedDepreciation | 98.9 | 97.9 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 19 | 31 |
| Percentage of RealEstateAccumulatedDepreciation | 1.1 | 2.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 7.918 | 6.832 |
| Percentage of RealEstateAccumulatedDepreciation | 0.4 | 0.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 148 | 120 |
| Percentage of RealEstateAccumulatedDepreciation | 8.3 | 8.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 27 | 20 |
| Percentage of RealEstateAccumulatedDepreciation | 1.5 | 1.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 12 | 9.69 |
| Percentage of RealEstateAccumulatedDepreciation | 0.7 | 0.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 35 | 28 |
| Percentage of RealEstateAccumulatedDepreciation | 2.0 | 1.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 116 | 94 |
| Percentage of RealEstateAccumulatedDepreciation | 6.6 | 6.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 77 | 65 |
| Percentage of RealEstateAccumulatedDepreciation | 4.3 | 4.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 1.087 | 0.933 |
| Percentage of RealEstateAccumulatedDepreciation | 0.1 | 0.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 65 | 53 |
| Percentage of RealEstateAccumulatedDepreciation | 3.7 | 3.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 149 | 126 |
| Percentage of RealEstateAccumulatedDepreciation | 8.4 | 8.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 41 | 34 |
| Percentage of RealEstateAccumulatedDepreciation | 2.3 | 2.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 74 | 65 |
| Percentage of RealEstateAccumulatedDepreciation | 4.2 | 4.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 24 | 20 |
| Percentage of RealEstateAccumulatedDepreciation | 1.4 | 1.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 24 | 21 |
| Percentage of RealEstateAccumulatedDepreciation | 1.4 | 1.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 103 | 88 |
| Percentage of RealEstateAccumulatedDepreciation | 5.8 | 5.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 101 | 87 |
| Percentage of RealEstateAccumulatedDepreciation | 5.7 | 5.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 3.34 | 4.955 |
| Percentage of RealEstateAccumulatedDepreciation | 0.2 | 0.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 71 | 57 |
| Percentage of RealEstateAccumulatedDepreciation | 4.0 | 3.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 15 | 13 |
| Percentage of RealEstateAccumulatedDepreciation | 0.9 | 0.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 42 | 35 |
| Percentage of RealEstateAccumulatedDepreciation | 2.4 | 2.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 20 | 16 |
| Percentage of RealEstateAccumulatedDepreciation | 1.1 | 1.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 7.293 | 6.462 |
| Percentage of RealEstateAccumulatedDepreciation | 0.4 | 0.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 6.053 | 5.415 |
| Percentage of RealEstateAccumulatedDepreciation | 0.3 | 0.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 100 | 83 |
| Percentage of RealEstateAccumulatedDepreciation | 5.7 | 5.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 54 | 45 |
| Percentage of RealEstateAccumulatedDepreciation | 3.1 | 3.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 88 | 71 |
| Percentage of RealEstateAccumulatedDepreciation | 5.0 | 4.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 8.718 | 7.093 |
| Percentage of RealEstateAccumulatedDepreciation | 0.5 | 0.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 71 | 60 |
| Percentage of RealEstateAccumulatedDepreciation | 4.0 | 4.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 58 | 46 |
| Percentage of RealEstateAccumulatedDepreciation | 3.3 | 3.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 29 | 27 |
| Percentage of RealEstateAccumulatedDepreciation | 1.7 | 1.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 23 | 18 |
| Percentage of RealEstateAccumulatedDepreciation | 1.4 | 1.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 24 | 18 |
| Percentage of RealEstateAccumulatedDepreciation | 1.4 | 1.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 79 | 65 |
| Percentage of RealEstateAccumulatedDepreciation | 4.5 | 4.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 14 | 12 |
| Percentage of RealEstateAccumulatedDepreciation | 0.8 | 0.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 24 | 20 |
| Percentage of RealEstateAccumulatedDepreciation | 1.4 | 1.4 |
| 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 |
| Value | 8516 | 8020 | 7742 | 7332 | 6686 | 5476 | 4812 | 3195 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 239 | 131 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 2.8 | 1.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 8163 | 7691 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 95.8 | 95.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 114 | 196 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.3 | 2.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 28 | 27 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.3 | 0.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 763 | 705 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 9.0 | 8.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 152 | 118 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.8 | 1.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 70 | 71 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.8 | 0.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 201 | 178 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 2.4 | 2.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 610 | 573 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 7.2 | 7.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 290 | 284 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 3.4 | 3.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 3.71 | 3.698 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 301 | 290 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 3.5 | 3.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 610 | 602 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 7.2 | 7.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 203 | 196 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 2.4 | 2.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 264 | 264 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 3.1 | 3.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 102 | 102 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.2 | 1.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 100 | 98 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.2 | 1.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 433 | 439 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 5.1 | 5.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 363 | 356 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 4.3 | 4.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 15 | 29 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.2 | 0.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 370 | 325 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 4.3 | 4.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 68 | 68 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.8 | 0.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 176 | 154 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 2.1 | 1.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 89 | 88 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.0 | 1.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 26 | 27 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.3 | 0.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 21 | 21 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.3 | 0.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 511 | 468 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 6.0 | 5.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 261 | 244 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 3.1 | 3.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 430 | 407 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 5.1 | 5.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 50 | 42 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.6 | 0.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 322 | 308 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 3.8 | 3.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 321 | 263 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 3.8 | 3.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 124 | 132 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.5 | 1.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 138 | 129 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.6 | 1.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 161 | 154 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.9 | 1.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 408 | 360 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 4.8 | 4.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 55 | 44 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 0.7 | 0.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 107 | 106 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements | 1.3 | 1.3 |
| 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 |
| Value | 2142 | 2025 | 1773 | 1672 | 1528 | 1229 | 1104 | 728 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 270 | 224 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 12.6 | 11.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 1836 | 1756 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 85.8 | 86.7 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 34 | 44 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 1.6 | 2.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 158 | 149 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 7.4 | 7.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 30 | 27 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 1.4 | 1.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 18 | 19 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 0.9 | 1.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 51 | 45 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 2.4 | 2.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 146 | 137 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 6.8 | 6.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 61 | 61 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 2.9 | 3.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 60 | 58 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 2.8 | 2.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 110 | 110 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 5.2 | 5.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 46 | 44 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 2.2 | 2.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 54 | 54 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 2.5 | 2.7 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 20 | 20 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 0.9 | 1.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 16 | 16 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 0.8 | 0.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 61 | 62 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 2.9 | 3.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 74 | 74 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 3.5 | 3.7 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 11 | 21 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 0.5 | 1.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 75 | 67 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 3.5 | 3.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 12 | 12 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 0.6 | 0.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 38 | 32 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 1.8 | 1.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 21 | 21 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 1.0 | 1.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 2.21 | 2.318 |
| Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand | 0.1 | 0.1 |