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    2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31
Common Stock Value 786.09767.83602.38590.77573.58569.78568.07565.11563.85562.77561.26558.28556.62555.05459.93457.64455.50452.19450.41448.87447.13NANA
Weighted Average Number Of Diluted Shares Outstanding 34.9434.3531.21NA30.7030.6630.63NA30.5530.5430.5430.5230.4329.3928.9728.9428.8228.7928.8028.8028.6828.7228.72
Weighted Average Number Of Shares Outstanding Basic 34.9434.3131.19NA30.7030.6630.61NA30.5530.5430.4930.4530.4329.3428.9128.8528.8228.7928.7528.7228.6828.6528.63
Earnings Per Share Basic -0.560.051.801.32-0.67-0.021.941.70-0.59-0.161.561.21-0.630.041.491.24-0.41-0.031.44-3.14-0.300.101.41
Earnings Per Share Diluted -0.560.051.801.32-0.67-0.021.941.70-0.59-0.161.561.20-0.630.041.491.24-0.41-0.031.44-3.13-0.300.101.40

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Revenue From Contract With Customer Including Assessed Tax 109.95201.00346.83288.8594.75133.44311.11250.0988.28124.99281.00247.2787.98117.58302.49226.7088.52120.78263.93238.6386.21134.48295.72
Revenues 116.84194.96350.30294.09101.45148.92315.95260.2793.28134.97285.15247.2790.32123.44285.35226.7091.24124.57263.63238.6386.21134.48295.72
Operating Expenses 131.77181.42262.66223.91115.84136.29221.24185.72104.87126.03208.71186.3099.95107.34209.30164.4597.35116.30195.88NANANANA
Operating Costs And Expenses 50.7453.1757.4854.6647.3350.0552.1945.8741.3543.9848.9246.3440.8939.4951.48-252.8397.3538.0339.52-273.0890.75NANA
Operating Income Loss -14.9313.5487.6470.18-14.3912.6294.7174.55-11.598.9476.4560.97-9.6316.1076.0562.25-6.118.2767.7559.93-4.54NANA
Interest Paid Net 8.9114.897.9812.818.9412.998.9812.826.6714.798.3713.498.0111.757.9812.50NANANANANANANA
Interest Income Expense Nonoperating Net -13.05-11.58-11.52-11.16-11.18-11.03-11.13-10.71-9.16-12.71-10.47-10.88-10.95-10.65-10.21-10.01-9.01-8.77-9.27-9.21-9.21NANA
Income Tax Expense Benefit -6.760.4718.9214.29-7.13-0.2820.5213.99-5.36-1.6714.137.68-4.340.628.6813.00-4.29-0.1615.6316.55-5.72NANA
Income Taxes Paid Net 1.020.310.773.58-0.426.610.804.308.800.80-0.266.00-0.00-6.00-0.095.328.703.559.803.20NANANA
Net Income Loss -19.591.7256.2440.53-20.66-0.7259.5252.05-17.91-4.8547.5036.74-19.301.0943.2035.82-11.79-1.0041.54-90.17-8.492.7340.31
Comprehensive Income Net Of Tax -19.391.9156.4441.35-20.42-0.5059.7449.37-17.73-4.6947.6634.22-19.191.2143.3236.61-11.64-0.8441.69-92.08-8.35NANA

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Assets 4300.714100.524054.634064.603929.223783.503758.623756.383618.103641.354001.533428.453251.623238.133191.123242.663081.412986.763029.343039.753105.61NANA
Liabilities And Stockholders Equity 4300.714100.524054.634064.603929.223783.503758.623756.383618.103641.354001.533428.453251.623238.133191.123242.663081.412986.763029.343039.753105.61NANA
Stockholders Equity 1120.861138.78987.94935.15891.46922.83936.32888.73852.77884.00901.74866.00844.67876.75794.23762.63737.58759.53772.21742.78846.68NANA

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Assets Current 481.77357.99391.37437.28358.18273.84302.79323.25242.85316.44720.27293.69202.73239.06272.11295.92218.16180.84241.69269.94199.55NANA
Cash And Cash Equivalents At Carrying Value 108.5617.2124.3218.5619.5020.0817.9130.1735.93137.06471.089.6510.5260.8812.8212.6329.968.7611.213.4715.78NANA
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents 120.2730.0435.6427.1227.6728.3125.5135.4541.17142.55475.8612.64NANANA14.91NANANANANANANA
Other Assets Current 41.4136.0642.3359.2933.2822.4330.6644.7425.5320.3226.4638.0018.6218.3020.2928.4720.3811.6716.8824.9517.29NANA

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Assets Noncurrent 3818.943742.523663.273627.333571.053509.663455.833433.133375.253324.913281.263134.763048.892999.072919.012946.742863.252805.922787.642769.812906.06NANA
Property Plant And Equipment Gross 4207.334129.244041.893997.243919.103849.793788.283734.043680.873608.903551.073476.753416.723355.813439.463414.493370.393298.863251.073204.643148.55NANA
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment 1166.151150.561137.141125.871112.731093.861091.901079.271073.621062.301050.851037.851027.331016.181005.12993.12996.99985.00972.77960.48954.78NANA
Property Plant And Equipment Net 3041.182978.682904.762871.372806.362755.932696.382654.772607.252546.602500.222438.902389.392339.632434.342421.372373.392313.862278.302244.162193.76NANA
Goodwill 74.7370.7170.5770.5769.7969.3169.3369.2270.2970.1869.2249.9349.3349.398.958.956.560.000.000.000.00NANA
Other Assets Noncurrent 88.1775.7074.9256.7653.4250.5249.7749.1350.9551.4547.7338.4627.8418.1616.0814.1512.8411.597.036.504.19NANA

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Liabilities Current 511.36539.30658.27724.76734.97572.47585.66627.08551.30486.90798.87482.17358.41307.03526.09509.08382.94297.88316.85381.85202.95NANA
Long Term Debt Current 50.610.350.340.340.2860.2795.2795.3495.1735.210.2075.1194.67104.40104.1629.9984.9474.7874.7896.7022.00NANA
Accounts Payable Current 118.27135.36130.56133.4994.9097.8588.5997.9783.8179.9086.77113.3776.2076.43103.21115.8880.1470.5577.86111.0287.12NANA
Accrued Income Taxes Current 18.0811.3214.2615.5216.5615.1423.5513.8113.7718.5423.8411.9713.387.0011.0011.0213.076.9212.0218.8811.93NANA
Other Liabilities Current 39.8047.6252.7854.4339.2243.9548.9852.3349.8754.3262.6262.7039.8736.6154.5454.4935.5032.9439.1739.9427.22NANA

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Long Term Debt 1337.601045.901045.001044.90916.30975.80955.90955.40955.40954.10954.20881.10900.70910.40736.60736.24809.59758.68NA779.89779.42NANA
Long Term Debt Noncurrent 1287.011045.531044.671044.59916.03915.50860.65860.08860.24918.89953.96805.96806.01806.00632.48706.25724.65683.89683.50683.18757.43NANA
Deferred Income Tax Liabilities Net 349.63355.47353.75340.23323.93325.60328.11319.29296.52298.00300.17295.64284.62292.79293.66NANANANANANANANA
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent 160.20162.51164.53166.68202.29203.85210.81217.29202.94218.49224.49228.13215.01217.91220.73221.89212.25218.06221.73223.33212.26NANA
Other Liabilities Noncurrent 110.83111.70112.75114.98115.11117.66118.99120.77123.04120.85119.03123.39123.35129.84120.57147.76140.47140.16137.15135.29134.12NANA
Operating Lease Liability Noncurrent 78.4778.8379.1679.4779.7980.0980.4180.6280.8580.1679.110.840.730.721.500.000.000.000.00NANANANA

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Stockholders Equity 1120.861138.78987.94935.15891.46922.83936.32888.73852.77884.00901.74866.00844.67876.75794.23762.63737.58759.53772.21742.78846.68NANA
Stockholders Equity Including Portion Attributable To Noncontrolling Interest 1120.861138.78987.94935.15891.46922.83936.32888.73852.77884.00901.74866.00844.67876.75794.23762.63737.58759.53772.21742.78NANANA
Common Stock Value 786.09767.83602.38590.77573.58569.78568.07565.11563.85562.77561.26558.28556.62555.05459.93457.64455.50452.19450.41448.87447.13NANA
Retained Earnings Accumulated Deficit 345.57381.96396.77355.78330.11365.50380.94336.52299.15331.65351.05318.45296.26330.02342.73312.18290.06315.46330.08302.35406.08NANA
Accumulated Other Comprehensive Income Loss Net Of Tax -10.81-11.01-11.21-11.40-12.23-12.46-12.68-12.90-10.23-10.41-10.57-10.73-8.21-8.32-8.44-7.19-7.98-8.13-8.28-8.44-6.53-6.68NA

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Net Cash Provided By Used In Operating Activities -30.6055.53141.04-21.37-12.5657.22137.06-5.52-11.0156.68102.8630.010.1850.31104.7910.24-4.1258.13104.5213.85NANANA
Net Cash Provided By Used In Investing Activities -87.32-99.94-69.75-96.60-75.64-64.01-63.88-67.51-66.35-58.99-101.43-78.49-71.89-102.34-51.06-56.38-58.62-44.97-57.49-67.60NANANA
Net Cash Provided By Used In Financing Activities 208.1638.80-62.76117.4287.569.59-83.1367.27-23.78-331.71460.0047.6121.35100.09-53.5528.8083.95-15.62-39.29NANANANA

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Net Cash Provided By Used In Operating Activities -30.6055.53141.04-21.37-12.5657.22137.06-5.52-11.0156.68102.8630.010.1850.31104.7910.24-4.1258.13104.5213.85NANANA
Net Income Loss -19.591.7256.2440.53-20.66-0.7259.5252.05-17.91-4.8547.5036.74-19.301.0943.2035.82-11.79-1.0041.54-90.17-8.492.7340.31
Depreciation Depletion And Amortization 29.0328.1128.43NA28.4428.1428.10NA25.9325.8424.68NA23.3822.3921.57NANANANANANANANA
Increase Decrease In Other Operating Capital Net 3.5611.20-3.074.2412.7911.20-2.17-1.604.103.356.63-2.431.9213.69-8.89-4.142.604.95-3.964.12NANANA
Increase Decrease In Inventories 32.7432.61-23.89-2.7420.9712.79-16.45-2.391.079.62-9.572.6818.226.18-21.11-8.349.948.34-13.14-10.97NANANA
Increase Decrease In Accounts Payable -16.282.76-16.4930.18-0.82-14.91-2.334.40-1.394.51-23.4315.28-3.92-12.96-14.8839.723.68-7.57-19.0430.37NANANA

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Net Cash Provided By Used In Investing Activities -87.32-99.94-69.75-96.60-75.64-64.01-63.88-67.51-66.35-58.99-101.43-78.49-71.89-102.34-51.06-56.38-58.62-44.97-57.49-67.60NANANA

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Net Cash Provided By Used In Financing Activities 208.1638.80-62.76117.4287.569.59-83.1367.27-23.78-331.71460.0047.6121.35100.09-53.5528.8083.95-15.62-39.29NANANANA
Payments Of Dividends Common Stock 16.1215.8614.4514.0913.9813.9813.8613.9113.8313.8513.8313.7313.6912.9812.9412.9212.8112.8012.7813.57NANANA

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Revenues 116.84194.96350.30294.09101.45148.92315.95260.2793.28134.97285.15247.2790.32123.44285.35226.7091.24124.57263.63238.6386.21134.48295.72
Northwest Natural Gas Company 110.43190.25346.62290.0996.04144.58312.35256.6988.37131.16282.53245.2687.59122.24284.85226.1591.23124.56263.63238.7986.16134.42295.67
Northwest Natural Gas Company, Operating, Alternativerevenue, Natural Gas Distribution 2.59-10.33-0.830.852.3111.080.455.580.405.37-0.47-4.86-2.613.73-17.253.701.993.66-0.37NANANANA
Northwest Natural Gas Company, Corporate Non, Other Northwest Natural 7.135.625.235.204.994.9611.014.864.614.174.044.824.534.265.807.026.156.055.70NANANANA
Northwest Natural Gas Company, Operating, Natural Gas Distribution 103.30184.63341.40284.8991.04139.61301.34251.8383.76126.99278.49240.4483.06117.98279.04219.1285.08118.52257.93NANANANA
Northwest Natural Gas Company, Alternativerevenue, Northwest Natural Gas Company 2.59-10.33-0.830.852.3111.080.455.580.405.37-0.47-4.86-2.613.73-17.253.701.993.66-0.37NANANANA
Northwest Natural Gas Company, Northwest Natural Gas Company 110.43190.25346.62290.0996.04144.58312.35256.6988.37131.16282.53245.2687.59122.24284.85226.1591.23124.56263.63NANANANA
116.84194.96350.30294.09101.45148.92315.95260.2793.28134.97285.15247.2690.32123.44285.35226.7091.24124.57263.63NANANANA
Corporate Non, Other Northwest Holdings 6.414.713.684.005.414.343.603.584.923.812.622.002.731.200.500.560.010.000.00NANANANA
Corporate Non, Other Northwest Natural 7.135.625.235.204.994.9611.014.864.614.174.044.824.534.265.807.026.156.055.70NANANANA
Operating, Natural Gas Distribution 103.30184.63341.40284.8991.04139.61301.34251.8383.76126.99278.49240.4483.06117.98279.04219.1285.08118.52257.93NANANANA
Operating, Northwest Natural Gas Company 110.43190.25346.62290.0996.04144.58312.35256.6988.37131.16282.53245.2687.59122.24284.85226.1591.23124.56263.63NANANANA
Alternativerevenue 2.59-10.33-0.830.852.3111.080.455.580.405.37-0.47-4.86-2.613.73-17.253.701.993.66-0.37NANANANA
Northwest Natural Gas Company, Corporate Non, Appliance Center Revenue, Other Northwest Natural, Transferred At Point In Time 1.201.441.721.831.191.341.591.841.190.811.561.910.991.061.521.861.021.171.55NANANANA
Northwest Natural Gas Company, Corporate Non, Asset Management Revenue Netof Regulatory Sharing, Other Northwest Natural, Transferred Over Time 3.051.140.750.631.010.826.930.530.940.910.150.531.210.461.511.572.712.141.58NANANANA
Northwest Natural Gas Company, Corporate Non, Gas Storage Revenue Netof Regulatory Sharing, Other Northwest Natural, Transferred Over Time 2.883.042.762.742.792.812.502.492.482.452.342.382.332.742.783.592.422.742.58NANANANA
Northwest Natural Gas Company, Corporate Non, Other Northwest Natural 7.135.625.235.204.994.9611.014.864.614.174.044.824.534.265.807.026.156.055.70NANANANA
Corporate Non, Otherrevenue, Other Northwest Holdings, Transferred Over Time 6.414.713.684.005.414.343.603.584.923.812.622.002.731.200.500.560.010.000.00NANANANA
Corporate Non, Other Northwest Holdings 6.414.713.684.005.414.343.603.584.923.812.622.002.731.200.500.560.010.000.00NANANANA
Revenue From Contract With Customer Including Assessed Tax 109.95201.00346.83288.8594.75133.44311.11250.0988.28124.99281.00247.2787.98117.58302.49226.7088.52120.78263.93238.6386.21134.48295.72
Northwest Natural Gas Company, Operating, Natural Gas Sales, Natural Gas Distribution, Transferred Over Time 95.78190.04337.30279.2683.95123.74296.08241.3178.43116.68274.00240.6280.48112.02296.19215.3582.36114.73258.23NANANANA
Northwest Natural Gas Company, Operating, Otherrevenue, Natural Gas Distribution, Transferred Over Time 0.620.630.630.400.400.400.410.340.330.330.340.500.250.100.000.000.000.000.00NANANANA
Northwest Natural Gas Company, Operating, Natural Gas Distribution 96.41190.67337.93279.6684.35124.14296.50241.6478.76117.01274.34241.1180.73112.12296.19215.3582.36114.73258.23NANANANA
Northwest Natural Gas Company, Appliance Center Revenue, Northwest Natural Gas Company, Transferred At Point In Time 1.201.441.721.831.191.341.591.841.190.811.561.910.991.061.521.861.021.171.55NANANANA
Northwest Natural Gas Company, Asset Management Revenue Netof Regulatory Sharing, Northwest Natural Gas Company, Transferred Over Time 3.051.140.750.631.010.826.930.530.940.910.150.531.210.461.511.572.712.141.58NANANANA
Northwest Natural Gas Company, Gas Storage Revenue Netof Regulatory Sharing, Northwest Natural Gas Company, Transferred Over Time 2.883.042.762.742.792.812.502.492.482.452.342.382.332.742.783.592.422.742.58NANANANA
Northwest Natural Gas Company, Natural Gas Sales, Northwest Natural Gas Company, Transferred Over Time 95.78190.04337.30279.2683.95123.74296.08241.3178.43116.68274.00240.6280.48112.02296.19215.3582.36114.73258.23NANANANA
Northwest Natural Gas Company, Otherrevenue, Northwest Natural Gas Company, Transferred Over Time 0.620.630.630.400.400.400.410.340.330.330.340.500.250.100.000.000.000.000.00NANANANA
Northwest Natural Gas Company, Northwest Natural Gas Company 103.54196.29343.15284.8689.34129.10307.51246.5183.37121.18278.38245.9485.26116.38301.99222.3788.51120.77263.93NANANANA
Appliance Center Revenue, Transferred At Point In Time 1.201.441.721.831.191.341.591.841.190.811.561.910.991.061.521.861.021.171.55NANANANA
Asset Management Revenue Netof Regulatory Sharing, Transferred Over Time 3.051.140.750.631.010.826.930.530.940.910.150.531.210.461.511.572.712.141.58NANANANA
Gas Storage Revenue Netof Regulatory Sharing, Transferred Over Time 2.883.042.762.742.792.812.502.492.482.452.342.382.332.742.783.592.422.742.58NANANANA
Natural Gas Sales, Transferred Over Time 95.78190.04337.30279.2683.95123.74296.08241.3178.43116.68274.00240.6280.48112.02296.19215.3582.36114.73258.23NANANANA
Otherrevenue, Transferred Over Time 7.045.344.314.405.814.744.013.915.254.152.962.502.971.300.500.560.010.000.00NANANANA

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Earnings Per Share Diluted
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Proceeds From Payments For Other Financing Activities
Shares
Weighted Average Number Of Diluted Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year

Line plots across dimensions of each concept


Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:Operating', None)
Operating  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
dei:LegalEntity, us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:TimingOfTransferOfGoodOrService
('nwn:NorthwestNaturalGasCompany', 'us-gaap:CorporateNon', None, 'nwn:OtherNorthwestNatural', 'us-gaap:TransferredOverTime')
Revenue From Contract With Customer Excluding Assessed Taxdei: Legal Entity, us-gaap: Consolidation Items, us-gaap: Product Or Service, us-gaap: Statement Business Segments, us-gaap: Timing Of Transfer Of Good Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService, us-gaap:TimingOfTransferOfGoodOrService
(None, 'us-gaap:TransferredOverTime')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service, us-gaap: Timing Of Transfer Of Good Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
dei:LegalEntity, us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:TimingOfTransferOfGoodOrService
('nwn:NorthwestNaturalGasCompany', 'us-gaap:Operating', None, 'nwn:NaturalGasDistribution', 'us-gaap:TransferredOverTime')
Revenue From Contract With Customer Including Assessed Taxdei: Legal Entity, us-gaap: Consolidation Items, us-gaap: Product Or Service, us-gaap: Statement Business Segments, us-gaap: Timing Of Transfer Of Good Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
dei:LegalEntity, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:TimingOfTransferOfGoodOrService
('nwn:NorthwestNaturalGasCompany', None, 'nwn:NorthwestNaturalGasCompany', 'us-gaap:TransferredOverTime')
Revenue From Contract With Customer Including Assessed Taxdei: Legal Entity, us-gaap: Product Or Service, us-gaap: Statement Business Segments, us-gaap: Timing Of Transfer Of Good Or Service
us-gaap:Revenues
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:Operating', None)
Revenuesus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:CorporateNon', None)
Revenuesus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:Operating', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:CorporateNon', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:IncomeLossFromContinuingOperations
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:Operating', None)
Income Loss From Continuing Operationsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:IncomeLossFromContinuingOperations
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:CorporateNon', None)
Income Loss From Continuing Operationsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:Operating', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:CorporateNon', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:StatementBusinessSegments
(None,)
Property Plant And Equipment Grossus-gaap: Statement Business Segments
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:StatementBusinessSegments
(None,)
Accumulated Depreciation Depletion And Amortization Property Plant And Equipmentus-gaap: Statement Business Segments
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementBusinessSegments
(None,)
Property Plant And Equipment Netus-gaap: Statement Business Segments
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity, us-gaap:StatementEquityComponents
('nwn:NorthwestNaturalGasCompany', None)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestdei: Legal Entity, us-gaap: Statement Equity Components
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:Operating', None)
Payments To Acquire Property Plant And Equipmentus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:CorporateNon', None)
Payments To Acquire Property Plant And Equipmentus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:Operating', None)
Revenuesus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:CorporateNon', None)
Revenuesus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
dei:LegalEntity, us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:TimingOfTransferOfGoodOrService
('nwn:NorthwestNaturalGasCompany', 'us-gaap:CorporateNon', None, 'nwn:OtherNorthwestNatural', 'us-gaap:TransferredOverTime')
Revenue From Contract With Customer Excluding Assessed Taxdei: Legal Entity, us-gaap: Consolidation Items, us-gaap: Product Or Service, us-gaap: Statement Business Segments, us-gaap: Timing Of Transfer Of Good Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService, us-gaap:TimingOfTransferOfGoodOrService
(None, 'us-gaap:TransferredOverTime')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service, us-gaap: Timing Of Transfer Of Good Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
dei:LegalEntity, us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:TimingOfTransferOfGoodOrService
('nwn:NorthwestNaturalGasCompany', 'us-gaap:Operating', None, 'nwn:NaturalGasDistribution', 'us-gaap:TransferredOverTime')
Revenue From Contract With Customer Including Assessed Taxdei: Legal Entity, us-gaap: Consolidation Items, us-gaap: Product Or Service, us-gaap: Statement Business Segments, us-gaap: Timing Of Transfer Of Good Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
dei:LegalEntity, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments, us-gaap:TimingOfTransferOfGoodOrService
('nwn:NorthwestNaturalGasCompany', None, 'nwn:NorthwestNaturalGasCompany', 'us-gaap:TransferredOverTime')
Revenue From Contract With Customer Including Assessed Taxdei: Legal Entity, us-gaap: Product Or Service, us-gaap: Statement Business Segments, us-gaap: Timing Of Transfer Of Good Or Service