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| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | 986.54 | 929.50 | 905.15 | 890.98 | 851.29 | 831.13 | 824.30 | 805.25 | 786.09 | 767.83 | 602.38 | 590.77 | 573.58 | 569.78 | 568.07 | 565.11 | 563.85 | 562.77 | 561.26 | 558.28 | 556.62 | 555.05 | 459.93 | 457.64 | 455.50 | 452.19 | 450.41 | 448.87 | 447.13 | NA | NA | |
| dei: Entity Common Stock Shares Outstanding | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Weighted Average Number Of Diluted Shares Outstanding | 38.39 | 38.26 | 37.80 | NA | 36.21 | 36.06 | 35.71 | NA | 34.94 | 34.35 | 31.21 | NA | 30.70 | 30.66 | 30.63 | NA | 30.55 | 30.54 | 30.54 | 30.52 | 30.43 | 29.39 | 28.97 | 28.94 | 28.82 | 28.79 | 28.80 | 28.80 | 28.68 | 28.72 | 28.72 | |
| Weighted Average Number Of Shares Outstanding Basic | 38.39 | 38.26 | 37.77 | NA | 36.21 | 36.02 | 35.61 | NA | 34.94 | 34.31 | 31.19 | NA | 30.70 | 30.66 | 30.61 | NA | 30.55 | 30.54 | 30.49 | 30.45 | 30.43 | 29.34 | 28.91 | 28.85 | 28.82 | 28.79 | 28.75 | 28.72 | 28.68 | 28.65 | 28.63 | |
| Earnings Per Share Basic | -0.71 | -0.07 | 1.69 | 1.22 | -0.65 | 0.03 | 2.01 | 1.39 | -0.56 | 0.05 | 1.80 | 1.32 | -0.67 | -0.02 | 1.94 | 1.70 | -0.59 | -0.16 | 1.56 | 1.21 | -0.63 | 0.04 | 1.49 | 1.24 | -0.41 | -0.03 | 1.44 | -3.14 | -0.30 | 0.10 | 1.41 | |
| Earnings Per Share Diluted | -0.71 | -0.07 | 1.69 | 1.22 | -0.65 | 0.03 | 2.01 | 1.40 | -0.56 | 0.05 | 1.80 | 1.32 | -0.67 | -0.02 | 1.94 | 1.70 | -0.59 | -0.16 | 1.56 | 1.20 | -0.63 | 0.04 | 1.49 | 1.24 | -0.41 | -0.03 | 1.44 | -3.13 | -0.30 | 0.10 | 1.40 |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Revenue From Contract With Customer Including Assessed Tax | 130.36 | 201.51 | 427.22 | 341.87 | 134.59 | 229.99 | 466.78 | 381.99 | 109.95 | 201.00 | 346.83 | 288.85 | 94.75 | 133.44 | 311.11 | 250.09 | 88.28 | 124.99 | 281.00 | 247.27 | 87.98 | 117.58 | 302.49 | 226.70 | 88.52 | 120.78 | 263.93 | 238.63 | 86.21 | 134.48 | 295.72 | |
| Revenues | 136.93 | 211.71 | 433.47 | 355.71 | 141.48 | 237.86 | 462.42 | 375.25 | 116.84 | 194.96 | 350.30 | 294.09 | 101.45 | 148.92 | 315.95 | 260.27 | 93.28 | 134.97 | 285.15 | 247.27 | 90.32 | 123.44 | 285.35 | 226.70 | 91.24 | 124.57 | 263.63 | 238.63 | 86.21 | 134.48 | 295.72 | |
| Operating Expenses | 156.27 | 196.01 | 323.64 | 280.55 | 159.06 | 224.02 | 348.92 | 294.03 | 131.77 | 181.42 | 262.66 | 223.91 | 115.84 | 136.29 | 221.24 | 185.72 | 104.87 | 126.03 | 208.71 | 186.30 | 99.95 | 107.34 | 209.30 | 164.45 | 97.35 | 116.30 | 195.88 | NA | NA | NA | NA | |
| Operating Costs And Expenses | 63.94 | 64.95 | 73.61 | 73.61 | 61.52 | 66.82 | 71.82 | 63.26 | 50.74 | 53.17 | 57.48 | 54.66 | 47.33 | 50.05 | 52.19 | 45.87 | 41.35 | 43.98 | 48.92 | 46.34 | 40.89 | 39.49 | 51.48 | -252.83 | 97.35 | 38.03 | 39.52 | -273.08 | 90.75 | NA | NA | |
| Operating Income Loss | -19.33 | 15.71 | 109.83 | 75.17 | -17.58 | 13.84 | 113.51 | 81.23 | -14.93 | 13.54 | 87.64 | 70.18 | -14.39 | 12.62 | 94.71 | 74.55 | -11.59 | 8.94 | 76.45 | 60.97 | -9.63 | 16.10 | 76.05 | 62.25 | -6.11 | 8.27 | 67.75 | 59.93 | -4.54 | NA | NA | |
| Interest Paid Net | 23.04 | 16.76 | 18.04 | 28.23 | 15.59 | 21.47 | 14.90 | 19.05 | 8.91 | 14.89 | 7.98 | 12.81 | 8.94 | 12.99 | 8.98 | 12.82 | 6.67 | 14.79 | 8.37 | 13.49 | 8.01 | 11.75 | 7.98 | 12.50 | NA | NA | NA | NA | NA | NA | NA | |
| Interest Income Expense Nonoperating Net | -19.06 | -19.31 | -20.53 | -19.89 | -19.41 | -18.97 | -18.30 | -17.09 | -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 | -9.21 | NA | NA | |
| Income Tax Expense Benefit | -10.29 | -0.81 | 24.34 | 15.26 | -8.29 | 0.24 | 25.15 | 16.50 | -6.76 | 0.47 | 18.92 | 14.29 | -7.13 | -0.28 | 20.52 | 13.99 | -5.36 | -1.67 | 14.13 | 7.68 | -4.34 | 0.62 | 8.68 | 13.00 | -4.29 | -0.16 | 15.63 | 16.55 | -5.72 | NA | NA | |
| Income Taxes Paid Net | 5.58 | 9.25 | 1.00 | 5.30 | 6.80 | 10.86 | 1.30 | 0.67 | 1.02 | 0.31 | 0.77 | 3.58 | -0.42 | 6.61 | 0.80 | 4.30 | 8.80 | 0.80 | -0.26 | 6.00 | -0.00 | -6.00 | -0.09 | 5.32 | 8.70 | 3.55 | 9.80 | 3.20 | NA | NA | NA | |
| Net Income Loss | -27.17 | -2.79 | 63.82 | 44.64 | -23.69 | 1.24 | 71.67 | 47.94 | -19.59 | 1.72 | 56.24 | 40.53 | -20.66 | -0.72 | 59.52 | 52.05 | -17.91 | -4.85 | 47.50 | 36.74 | -19.30 | 1.09 | 43.20 | 35.82 | -11.79 | -1.00 | 41.54 | -90.17 | -8.49 | 2.73 | 40.31 | |
| Comprehensive Income Net Of Tax | -27.85 | -2.46 | 64.05 | 42.57 | -23.41 | 2.58 | 71.36 | 52.46 | -19.39 | 1.91 | 56.44 | 41.35 | -20.42 | -0.50 | 59.74 | 49.37 | -17.73 | -4.69 | 47.66 | 34.22 | -19.19 | 1.21 | 43.32 | 36.61 | -11.64 | -0.84 | 41.69 | -92.08 | -8.35 | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Assets | 4944.37 | 4822.37 | 4849.07 | 4867.09 | 4665.12 | 4536.70 | 4592.10 | 4748.33 | 4300.71 | 4100.52 | 4054.63 | 4064.60 | 3929.22 | 3783.50 | 3758.62 | 3756.38 | 3618.10 | 3641.35 | 4001.53 | 3428.45 | 3251.62 | 3238.13 | 3191.12 | 3242.66 | 3081.41 | 2986.76 | 3029.34 | 3039.75 | 3105.61 | NA | NA | |
| Liabilities And Stockholders Equity | 4944.37 | 4822.37 | 4849.07 | 4867.09 | 4665.12 | 4536.70 | 4592.10 | 4748.33 | 4300.71 | 4100.52 | 4054.63 | 4064.60 | 3929.22 | 3783.50 | 3758.62 | 3756.38 | 3618.10 | 3641.35 | 4001.53 | 3428.45 | 3251.62 | 3238.13 | 3191.12 | 3242.66 | 3081.41 | 2986.76 | 3029.34 | 3039.75 | 3105.61 | NA | NA | |
| Stockholders Equity | 1357.05 | 1346.72 | 1343.39 | 1283.84 | 1219.54 | 1240.28 | 1248.31 | 1175.44 | 1120.86 | 1138.78 | 987.94 | 935.15 | 891.46 | 922.83 | 936.32 | 888.73 | 852.77 | 884.00 | 901.74 | 866.00 | 844.67 | 876.75 | 794.23 | 762.63 | 737.58 | 759.53 | 772.21 | 742.78 | 846.68 | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Assets Current | 408.85 | 423.12 | 537.71 | 601.44 | 507.44 | 457.86 | 576.17 | 744.21 | 481.77 | 357.99 | 391.37 | 437.28 | 358.18 | 273.84 | 302.79 | 323.25 | 242.85 | 316.44 | 720.27 | 293.69 | 202.73 | 239.06 | 272.11 | 295.92 | 218.16 | 180.84 | 241.69 | 269.94 | 199.55 | NA | NA | |
| Cash And Cash Equivalents At Carrying Value | 35.05 | 65.19 | 72.38 | 32.92 | 156.62 | 137.76 | 140.82 | 29.27 | 108.56 | 17.21 | 24.32 | 18.56 | 19.50 | 20.08 | 17.91 | 30.17 | 35.93 | 137.06 | 471.08 | 9.65 | 10.52 | 60.88 | 12.82 | 12.63 | 29.96 | 8.76 | 11.21 | 3.47 | 15.78 | NA | NA | |
| Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents | 46.81 | 81.04 | 89.26 | 49.62 | 171.48 | 155.08 | 155.99 | 40.96 | 120.27 | 30.04 | 35.64 | 27.12 | 27.67 | 28.31 | 25.51 | 35.45 | 41.17 | 142.55 | 475.86 | 12.64 | NA | NA | NA | 14.91 | NA | NA | NA | NA | NA | NA | NA | |
| Other Assets Current | 45.87 | 37.53 | 49.90 | 65.28 | 49.95 | 35.80 | 41.97 | 61.29 | 41.41 | 36.06 | 42.33 | 59.29 | 33.28 | 22.43 | 30.66 | 44.74 | 25.53 | 20.32 | 26.46 | 38.00 | 18.62 | 18.30 | 20.29 | 28.47 | 20.38 | 11.67 | 16.88 | 24.95 | 17.29 | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Assets Noncurrent | 4535.52 | 4399.25 | 4311.35 | 4265.65 | 4157.68 | 4078.85 | 4015.92 | 4004.11 | 3818.94 | 3742.52 | 3663.27 | 3627.33 | 3571.05 | 3509.66 | 3455.83 | 3433.13 | 3375.25 | 3324.91 | 3281.26 | 3134.76 | 3048.89 | 2999.07 | 2919.01 | 2946.74 | 2863.25 | 2805.92 | 2787.64 | 2769.81 | 2906.06 | NA | NA | |
| Property Plant And Equipment Gross | 4858.07 | 4764.59 | 4660.10 | 4556.61 | 4468.60 | 4391.99 | 4320.48 | 4261.57 | 4207.33 | 4129.24 | 4041.89 | 3997.24 | 3919.10 | 3849.79 | 3788.28 | 3734.04 | 3680.87 | 3608.90 | 3551.07 | 3476.75 | 3416.72 | 3355.81 | 3439.46 | 3414.49 | 3370.39 | 3298.86 | 3251.07 | 3204.64 | 3148.55 | NA | NA | |
| Accumulated Depreciation Depletion And Amortization Property Plant And Equipment | 1245.72 | 1234.15 | 1218.58 | 1198.56 | 1189.97 | 1181.23 | 1164.50 | 1147.17 | 1166.15 | 1150.56 | 1137.14 | 1125.87 | 1112.73 | 1093.86 | 1091.90 | 1079.27 | 1073.62 | 1062.30 | 1050.85 | 1037.85 | 1027.33 | 1016.18 | 1005.12 | 993.12 | 996.99 | 985.00 | 972.77 | 960.48 | 954.78 | NA | NA | |
| Property Plant And Equipment Net | 3612.34 | 3530.45 | 3441.52 | 3358.05 | 3278.63 | 3210.76 | 3155.98 | 3114.40 | 3041.18 | 2978.68 | 2904.76 | 2871.37 | 2806.36 | 2755.93 | 2696.38 | 2654.77 | 2607.25 | 2546.60 | 2500.22 | 2438.90 | 2389.39 | 2339.63 | 2434.34 | 2421.37 | 2373.39 | 2313.86 | 2278.30 | 2244.16 | 2193.76 | NA | NA | |
| Goodwill | 181.39 | 163.17 | 162.97 | 163.34 | 152.40 | 152.67 | 149.84 | 149.28 | 74.73 | 70.71 | 70.57 | 70.57 | 69.79 | 69.31 | 69.33 | 69.22 | 70.29 | 70.18 | 69.22 | 49.93 | 49.33 | 49.39 | 8.95 | 8.95 | 6.56 | 0.00 | 0.00 | 0.00 | 0.00 | NA | NA | |
| Other Assets Noncurrent | 139.03 | 112.73 | 111.12 | 106.24 | 100.80 | 96.83 | 97.79 | 91.52 | 88.17 | 75.70 | 74.92 | 56.76 | 53.42 | 50.52 | 49.77 | 49.13 | 50.95 | 51.45 | 47.73 | 38.46 | 27.84 | 18.16 | 16.08 | 14.15 | 12.84 | 11.59 | 7.03 | 6.50 | 4.19 | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Liabilities Current | 567.38 | 435.54 | 468.34 | 696.88 | 590.06 | 570.93 | 644.08 | 898.73 | 511.36 | 539.30 | 658.27 | 724.76 | 734.97 | 572.47 | 585.66 | 627.08 | 551.30 | 486.90 | 798.87 | 482.17 | 358.41 | 307.03 | 526.09 | 509.08 | 382.94 | 297.88 | 316.85 | 381.85 | 202.95 | NA | NA | |
| Long Term Debt Current | 20.80 | 0.87 | 0.87 | 150.87 | 190.73 | 240.71 | 240.71 | 90.70 | 50.61 | 0.35 | 0.34 | 0.34 | 0.28 | 60.27 | 95.27 | 95.34 | 95.17 | 35.21 | 0.20 | 75.11 | 94.67 | 104.40 | 104.16 | 29.99 | 84.94 | 74.78 | 74.78 | 96.70 | 22.00 | NA | NA | |
| Accounts Payable Current | 96.26 | 93.56 | 107.89 | 145.36 | 99.33 | 101.37 | 111.15 | 180.67 | 118.27 | 135.36 | 130.56 | 133.49 | 94.90 | 97.85 | 88.59 | 97.97 | 83.81 | 79.90 | 86.77 | 113.37 | 76.20 | 76.43 | 103.21 | 115.88 | 80.14 | 70.55 | 77.86 | 111.02 | 87.12 | NA | NA | |
| Accrued Income Taxes Current | 17.76 | 11.30 | 27.03 | 15.45 | 17.12 | 12.22 | 31.37 | 15.62 | 18.08 | 11.32 | 14.26 | 15.52 | 16.56 | 15.14 | 23.55 | 13.81 | 13.77 | 18.54 | 23.84 | 11.97 | 13.38 | 7.00 | 11.00 | 11.02 | 13.07 | 6.92 | 12.02 | 18.88 | 11.93 | NA | NA | |
| Other Liabilities Current | 59.53 | 79.12 | 89.11 | 93.63 | 61.15 | 58.78 | 71.66 | 64.55 | 39.80 | 47.62 | 52.78 | 54.43 | 39.22 | 43.95 | 48.98 | 52.33 | 49.87 | 54.32 | 62.62 | 62.70 | 39.87 | 36.61 | 54.54 | 54.49 | 35.50 | 32.94 | 39.17 | 39.94 | 27.22 | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Long Term Debt | 1575.80 | 1575.62 | 1575.60 | 1576.30 | 1615.30 | 1535.29 | 1535.30 | 1336.86 | 1337.60 | 1045.90 | 1045.00 | 1044.90 | 916.30 | 975.80 | 955.90 | 955.40 | 955.40 | 954.10 | 954.20 | 881.10 | 900.70 | 910.40 | 736.60 | 736.24 | 809.59 | 758.68 | NA | 779.89 | 779.42 | NA | NA | |
| Long Term Debt Noncurrent | 1555.00 | 1574.75 | 1574.73 | 1425.43 | 1424.57 | 1294.58 | 1294.59 | 1246.17 | 1287.01 | 1045.53 | 1044.67 | 1044.59 | 916.03 | 915.50 | 860.65 | 860.08 | 860.24 | 918.89 | 953.96 | 805.96 | 806.01 | 806.00 | 632.48 | 706.25 | 724.65 | 683.89 | 683.50 | 683.18 | 757.43 | NA | NA | |
| Deferred Income Tax Liabilities Net | 389.28 | 394.49 | 394.07 | 382.67 | 375.92 | 380.06 | 376.24 | 366.02 | 349.63 | 355.47 | 353.75 | 340.23 | 323.93 | 325.60 | 328.11 | 319.29 | 296.52 | 298.00 | 300.17 | 295.64 | 284.62 | 292.79 | 293.66 | NA | NA | NA | NA | NA | NA | NA | NA | |
| Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent | 138.80 | 153.85 | 157.81 | 158.12 | 145.99 | 147.06 | 147.89 | 149.14 | 160.20 | 162.51 | 164.53 | 166.68 | 202.29 | 203.85 | 210.81 | 217.29 | 202.94 | 218.49 | 224.49 | 228.13 | 215.01 | 217.91 | 220.73 | 221.89 | 212.25 | 218.06 | 221.73 | 223.33 | 212.26 | NA | NA | |
| Other Liabilities Noncurrent | 135.66 | 122.41 | 120.22 | 119.03 | 127.22 | 128.42 | 117.98 | 123.44 | 110.83 | 111.70 | 112.75 | 114.98 | 115.11 | 117.66 | 118.99 | 120.77 | 123.04 | 120.85 | 119.03 | 123.39 | 123.35 | 129.84 | 120.57 | 147.76 | 140.47 | 140.16 | 137.15 | 135.29 | 134.12 | NA | NA | |
| Operating Lease Liability Noncurrent | 76.53 | 76.69 | 77.05 | 77.17 | 77.47 | 77.95 | 78.30 | 78.97 | 78.47 | 78.83 | 79.16 | 79.47 | 79.79 | 80.09 | 80.41 | 80.62 | 80.85 | 80.16 | 79.11 | 0.84 | 0.73 | 0.72 | 1.50 | 0.00 | 0.00 | 0.00 | 0.00 | NA | NA | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stockholders Equity | 1357.05 | 1346.72 | 1343.39 | 1283.84 | 1219.54 | 1240.28 | 1248.31 | 1175.44 | 1120.86 | 1138.78 | 987.94 | 935.15 | 891.46 | 922.83 | 936.32 | 888.73 | 852.77 | 884.00 | 901.74 | 866.00 | 844.67 | 876.75 | 794.23 | 762.63 | 737.58 | 759.53 | 772.21 | 742.78 | 846.68 | NA | NA | |
| Stockholders Equity Including Portion Attributable To Noncontrolling Interest | 1357.05 | 1346.72 | 1343.39 | 1283.84 | 1219.54 | 1240.28 | 1248.31 | 1175.44 | 1120.86 | 1138.78 | 987.94 | 935.15 | 891.46 | 922.83 | 936.32 | 888.73 | 852.77 | 884.00 | 901.74 | 866.00 | 844.67 | 876.75 | 794.23 | 762.63 | 737.58 | 759.53 | 772.21 | 742.78 | NA | NA | NA | |
| Common Stock Value | 986.54 | 929.50 | 905.15 | 890.98 | 851.29 | 831.13 | 824.30 | 805.25 | 786.09 | 767.83 | 602.38 | 590.77 | 573.58 | 569.78 | 568.07 | 565.11 | 563.85 | 562.77 | 561.26 | 558.28 | 556.62 | 555.05 | 459.93 | 457.64 | 455.50 | 452.19 | 450.41 | 448.87 | 447.13 | NA | NA | |
| Retained Earnings Accumulated Deficit | 377.69 | 423.72 | 445.06 | 399.91 | 373.23 | 414.40 | 430.60 | 376.47 | 345.57 | 381.96 | 396.77 | 355.78 | 330.11 | 365.50 | 380.94 | 336.52 | 299.15 | 331.65 | 351.05 | 318.45 | 296.26 | 330.02 | 342.73 | 312.18 | 290.06 | 315.46 | 330.08 | 302.35 | 406.08 | NA | NA | |
| Accumulated Other Comprehensive Income Loss Net Of Tax | -7.18 | -6.50 | -6.83 | -7.05 | -4.98 | -5.25 | -6.59 | -6.29 | -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 | -6.68 | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Cash Provided By Used In Operating Activities | -26.38 | 121.04 | 125.04 | -21.55 | 3.65 | 120.99 | 176.86 | -18.29 | -30.60 | 55.53 | 141.04 | -21.37 | -12.56 | 57.22 | 137.06 | -5.52 | -11.01 | 56.68 | 102.86 | 30.01 | 0.18 | 50.31 | 104.79 | 10.24 | -4.12 | 58.13 | 104.52 | 13.85 | NA | NA | NA | |
| Net Cash Provided By Used In Investing Activities | -125.85 | -117.95 | -82.49 | -84.98 | -98.98 | -78.52 | -73.02 | -178.46 | -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 | -67.60 | NA | NA | NA | |
| Net Cash Provided By Used In Financing Activities | 118.00 | -11.30 | -2.92 | -15.32 | 111.73 | -43.38 | 11.19 | 117.44 | 208.16 | 38.80 | -62.76 | 117.42 | 87.56 | 9.59 | -83.13 | 67.27 | -23.78 | -331.71 | 460.00 | 47.61 | 21.35 | 100.09 | -53.55 | 28.80 | 83.95 | -15.62 | -39.29 | NA | NA | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Cash Provided By Used In Operating Activities | -26.38 | 121.04 | 125.04 | -21.55 | 3.65 | 120.99 | 176.86 | -18.29 | -30.60 | 55.53 | 141.04 | -21.37 | -12.56 | 57.22 | 137.06 | -5.52 | -11.01 | 56.68 | 102.86 | 30.01 | 0.18 | 50.31 | 104.79 | 10.24 | -4.12 | 58.13 | 104.52 | 13.85 | NA | NA | NA | |
| Net Income Loss | -27.17 | -2.79 | 63.82 | 44.64 | -23.69 | 1.24 | 71.67 | 47.94 | -19.59 | 1.72 | 56.24 | 40.53 | -20.66 | -0.72 | 59.52 | 52.05 | -17.91 | -4.85 | 47.50 | 36.74 | -19.30 | 1.09 | 43.20 | 35.82 | -11.79 | -1.00 | 41.54 | -90.17 | -8.49 | 2.73 | 40.31 | |
| Increase Decrease In Other Operating Capital Net | 8.67 | -4.26 | -4.53 | 2.12 | 2.22 | -7.78 | -15.01 | 0.67 | 3.56 | 11.20 | -3.07 | 4.24 | 12.79 | 11.20 | -2.17 | -1.60 | 4.10 | 3.35 | 6.63 | -2.43 | 1.92 | 13.69 | -8.89 | -4.14 | 2.60 | 4.95 | -3.96 | 4.12 | NA | NA | NA | |
| Increase Decrease In Inventories | 1.32 | 7.66 | -13.07 | 17.62 | 26.57 | 26.05 | -46.13 | -12.19 | 32.74 | 32.61 | -23.89 | -2.74 | 20.97 | 12.79 | -16.45 | -2.39 | 1.07 | 9.62 | -9.57 | 2.68 | 18.22 | 6.18 | -21.11 | -8.34 | 9.94 | 8.34 | -13.14 | -10.97 | NA | NA | NA | |
| Increase Decrease In Accounts Payable | -0.54 | 19.96 | -30.93 | -0.26 | 9.24 | -1.16 | -47.77 | 54.52 | -16.28 | 2.76 | -16.49 | 30.18 | -0.82 | -14.91 | -2.33 | 4.40 | -1.39 | 4.51 | -23.43 | 15.28 | -3.92 | -12.96 | -14.88 | 39.72 | 3.68 | -7.57 | -19.04 | 30.37 | NA | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Cash Provided By Used In Investing Activities | -125.85 | -117.95 | -82.49 | -84.98 | -98.98 | -78.52 | -73.02 | -178.46 | -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 | -67.60 | NA | NA | NA | |
| Payments To Acquire Property Plant And Equipment | 95.33 | 116.71 | 82.22 | 84.60 | 97.88 | 73.60 | 71.27 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 70.48 | 61.85 | 42.38 | 48.76 | 55.84 | 56.42 | 45.04 | 57.33 | 68.05 | NA | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Cash Provided By Used In Financing Activities | 118.00 | -11.30 | -2.92 | -15.32 | 111.73 | -43.38 | 11.19 | 117.44 | 208.16 | 38.80 | -62.76 | 117.42 | 87.56 | 9.59 | -83.13 | 67.27 | -23.78 | -331.71 | 460.00 | 47.61 | 21.35 | 100.09 | -53.55 | 28.80 | 83.95 | -15.62 | -39.29 | NA | NA | NA | NA | |
| Payments Of Dividends Common Stock | 18.18 | 17.85 | 17.75 | 17.23 | 16.82 | 16.76 | 16.53 | 16.34 | 16.12 | 15.86 | 14.45 | 14.09 | 13.98 | 13.98 | 13.86 | 13.91 | 13.83 | 13.85 | 13.83 | 13.73 | 13.69 | 12.98 | 12.94 | 12.92 | 12.81 | 12.80 | 12.78 | 13.57 | NA | NA | NA |
| 2024-09-30 | 2024-06-30 | 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Revenues | 136.93 | 211.71 | 433.47 | 355.71 | 141.48 | 237.86 | 462.42 | 375.25 | 116.84 | 194.96 | 350.30 | 294.09 | 101.45 | 148.92 | 315.95 | 260.27 | 93.28 | 134.97 | 285.15 | 247.27 | 90.32 | 123.44 | 285.35 | 226.70 | 91.24 | 124.57 | 263.63 | 238.63 | 86.21 | 134.48 | 295.72 | |
| Northwest Natural Gas Company | 121.19 | 200.19 | 422.77 | 345.82 | 129.94 | 228.35 | 454.51 | 367.04 | 110.43 | 190.25 | 346.62 | 290.09 | 96.04 | 144.58 | 312.35 | 256.69 | 88.37 | 131.16 | 282.53 | 245.26 | 87.59 | 122.24 | 284.85 | 226.15 | 91.23 | 124.56 | 263.63 | 238.79 | 86.16 | 134.42 | 295.67 | |
| Northwest Natural Gas Company, Operating, Alternativerevenue, Natural Gas Distribution | 2.45 | 6.08 | 2.12 | 9.82 | 2.87 | 3.86 | -8.35 | -11.03 | 2.59 | -10.33 | -0.83 | 0.85 | 2.31 | 11.08 | 0.45 | 5.58 | 0.40 | 5.37 | -0.47 | -4.86 | -2.61 | 3.73 | -17.25 | 3.70 | 1.99 | 3.66 | -0.37 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Corporate Non, Other Northwest Natural | 7.19 | 5.33 | 4.91 | 5.53 | 5.32 | 4.63 | 6.74 | 6.61 | 7.13 | 5.62 | 5.23 | 5.20 | 4.99 | 4.96 | 11.01 | 4.86 | 4.61 | 4.17 | 4.04 | 4.82 | 4.53 | 4.26 | 5.80 | 7.02 | 6.15 | 6.05 | 5.70 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Operating, Natural Gas Distribution | 114.00 | 194.86 | 417.86 | 340.29 | 124.62 | 223.71 | 447.77 | 360.43 | 103.30 | 184.63 | 341.40 | 284.89 | 91.04 | 139.61 | 301.34 | 251.83 | 83.76 | 126.99 | 278.49 | 240.44 | 83.06 | 117.98 | 279.04 | 219.12 | 85.08 | 118.52 | 257.93 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Alternativerevenue, Northwest Natural Gas Company | 2.45 | 6.08 | 2.12 | 9.82 | 2.87 | 3.86 | -8.35 | -11.03 | 2.59 | -10.33 | -0.83 | 0.85 | 2.31 | 11.08 | 0.45 | 5.58 | 0.40 | 5.37 | -0.47 | -4.86 | -2.61 | 3.73 | -17.25 | 3.70 | 1.99 | 3.66 | -0.37 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Northwest Natural Gas Company | 121.19 | 200.19 | 422.77 | 345.82 | 129.94 | 228.35 | 454.51 | 367.04 | 110.43 | 190.25 | 346.62 | 290.09 | 96.04 | 144.58 | 312.35 | 256.69 | 88.37 | 131.16 | 282.53 | 245.26 | 87.59 | 122.24 | 284.85 | 226.15 | 91.23 | 124.56 | 263.63 | NA | NA | NA | NA | |
| 136.93 | 211.71 | 433.47 | 355.71 | 141.48 | 237.86 | 462.42 | 375.25 | 116.84 | 194.96 | 350.30 | 294.09 | 101.45 | 148.92 | 315.95 | 260.27 | 93.28 | 134.97 | 285.15 | 247.26 | 90.32 | 123.44 | 285.35 | 226.70 | 91.24 | 124.57 | 263.63 | NA | NA | NA | NA | ||
| Corporate Non, Other Northwest Holdings | 15.74 | 11.53 | 10.70 | 9.89 | 11.54 | 9.51 | 7.91 | 8.21 | 6.41 | 4.71 | 3.68 | 4.00 | 5.41 | 4.34 | 3.60 | 3.58 | 4.92 | 3.81 | 2.62 | 2.00 | 2.73 | 1.20 | 0.50 | 0.56 | 0.01 | 0.00 | 0.00 | NA | NA | NA | NA | |
| Corporate Non, Other Northwest Natural | 7.19 | 5.33 | 4.91 | 5.53 | 5.32 | 4.63 | 6.74 | 6.61 | 7.13 | 5.62 | 5.23 | 5.20 | 4.99 | 4.96 | 11.01 | 4.86 | 4.61 | 4.17 | 4.04 | 4.82 | 4.53 | 4.26 | 5.80 | 7.02 | 6.15 | 6.05 | 5.70 | NA | NA | NA | NA | |
| Operating, Natural Gas Distribution | 114.00 | 194.86 | 417.86 | 340.29 | 124.62 | 223.71 | 447.77 | 360.43 | 103.30 | 184.63 | 341.40 | 284.89 | 91.04 | 139.61 | 301.34 | 251.83 | 83.76 | 126.99 | 278.49 | 240.44 | 83.06 | 117.98 | 279.04 | 219.12 | 85.08 | 118.52 | 257.93 | NA | NA | NA | NA | |
| Operating, Northwest Natural Gas Company | 121.19 | 200.19 | 422.77 | 345.82 | 129.94 | 228.35 | 454.51 | 367.04 | 110.43 | 190.25 | 346.62 | 290.09 | 96.04 | 144.58 | 312.35 | 256.69 | 88.37 | 131.16 | 282.53 | 245.26 | 87.59 | 122.24 | 284.85 | 226.15 | 91.23 | 124.56 | 263.63 | NA | NA | NA | NA | |
| Alternativerevenue | 2.45 | 6.08 | 2.12 | 9.82 | 2.87 | 3.86 | -8.35 | -11.03 | 2.59 | -10.33 | -0.83 | 0.85 | 2.31 | 11.08 | 0.45 | 5.58 | 0.40 | 5.37 | -0.47 | -4.86 | -2.61 | 3.73 | -17.25 | 3.70 | 1.99 | 3.66 | -0.37 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Corporate Non, Appliance Center Revenue, Other Northwest Natural, Transferred At Point In Time | 1.01 | 0.93 | 1.30 | 1.44 | 0.68 | 0.93 | 1.19 | 1.48 | 1.20 | 1.44 | 1.72 | 1.83 | 1.19 | 1.34 | 1.59 | 1.84 | 1.19 | 0.81 | 1.56 | 1.91 | 0.99 | 1.06 | 1.52 | 1.86 | 1.02 | 1.17 | 1.55 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Corporate Non, Asset Management Revenue Netof Regulatory Sharing, Other Northwest Natural, Transferred Over Time | 1.66 | 1.33 | 0.60 | 1.06 | 1.62 | 0.50 | 2.75 | 2.02 | 3.05 | 1.14 | 0.75 | 0.63 | 1.01 | 0.82 | 6.93 | 0.53 | 0.94 | 0.91 | 0.15 | 0.53 | 1.21 | 0.46 | 1.51 | 1.57 | 2.71 | 2.14 | 1.58 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Corporate Non, Gas Storage Revenue Netof Regulatory Sharing, Other Northwest Natural, Transferred Over Time | 4.52 | 3.07 | 3.00 | 3.03 | 3.01 | 3.20 | 2.80 | 3.11 | 2.88 | 3.04 | 2.76 | 2.74 | 2.79 | 2.81 | 2.50 | 2.49 | 2.48 | 2.45 | 2.34 | 2.38 | 2.33 | 2.74 | 2.78 | 3.59 | 2.42 | 2.74 | 2.58 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Corporate Non, Other Northwest Natural | 7.19 | 5.33 | 4.91 | 5.53 | 5.32 | 4.63 | 6.74 | 6.61 | 7.13 | 5.62 | 5.23 | 5.20 | 4.99 | 4.96 | 11.01 | 4.86 | 4.61 | 4.17 | 4.04 | 4.82 | 4.53 | 4.26 | 5.80 | 7.02 | 6.15 | 6.05 | 5.70 | NA | NA | NA | NA | |
| Corporate Non, Natural Gas Sales, Other Northwest Holdings, Transferred Over Time | 0.02 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | NA | NA | NA | NA | |
| Corporate Non, Otherrevenue, Other Northwest Holdings, Transferred Over Time | 15.39 | 11.53 | 10.70 | 9.89 | 11.54 | 9.51 | 7.91 | 8.21 | 6.41 | 4.71 | 3.68 | 4.00 | 5.41 | 4.34 | 3.60 | 3.58 | 4.92 | 3.81 | 2.62 | 2.00 | 2.73 | 1.20 | 0.50 | 0.56 | 0.01 | 0.00 | 0.00 | NA | NA | NA | NA | |
| Corporate Non, Renewable Natural Gas Sales, Other Northwest Holdings, Transferred Over Time | 0.33 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Corporate Non, Other Northwest Holdings | 15.74 | 11.53 | 10.70 | 9.89 | 11.54 | 9.51 | 7.91 | 8.21 | 6.41 | 4.71 | 3.68 | 4.00 | 5.41 | 4.34 | 3.60 | 3.58 | 4.92 | 3.81 | 2.62 | 2.00 | 2.73 | 1.20 | 0.50 | 0.56 | 0.01 | 0.00 | 0.00 | NA | NA | NA | NA | |
| Revenue From Contract With Customer Including Assessed Tax | 130.36 | 201.51 | 427.22 | 341.87 | 134.59 | 229.99 | 466.78 | 381.99 | 109.95 | 201.00 | 346.83 | 288.85 | 94.75 | 133.44 | 311.11 | 250.09 | 88.28 | 124.99 | 281.00 | 247.27 | 87.98 | 117.58 | 302.49 | 226.70 | 88.52 | 120.78 | 263.93 | 238.63 | 86.21 | 134.48 | 295.72 | |
| Northwest Natural Gas Company, Operating, Natural Gas Sales, Natural Gas Distribution, Transferred Over Time | 106.65 | 183.88 | 410.84 | 325.72 | 117.00 | 215.11 | 451.39 | 366.53 | 95.78 | 190.04 | 337.30 | 279.26 | 83.95 | 123.74 | 296.08 | 241.31 | 78.43 | 116.68 | 274.00 | 240.62 | 80.48 | 112.02 | 296.19 | 215.35 | 82.36 | 114.73 | 258.23 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Operating, Otherrevenue, Natural Gas Distribution, Transferred Over Time | 0.78 | 0.78 | 0.77 | 0.73 | 0.73 | 0.73 | 0.73 | 0.63 | 0.62 | 0.63 | 0.63 | 0.40 | 0.40 | 0.40 | 0.41 | 0.34 | 0.33 | 0.33 | 0.34 | 0.50 | 0.25 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Operating, Natural Gas Distribution | 107.43 | 184.66 | 411.61 | 326.45 | 117.74 | 215.84 | 452.12 | 367.16 | 96.41 | 190.67 | 337.93 | 279.66 | 84.35 | 124.14 | 296.50 | 241.64 | 78.76 | 117.01 | 274.34 | 241.11 | 80.73 | 112.12 | 296.19 | 215.35 | 82.36 | 114.73 | 258.23 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Appliance Center Revenue, Northwest Natural Gas Company, Transferred At Point In Time | 1.01 | 0.93 | 1.30 | 1.44 | 0.68 | 0.93 | 1.19 | 1.48 | 1.20 | 1.44 | 1.72 | 1.83 | 1.19 | 1.34 | 1.59 | 1.84 | 1.19 | 0.81 | 1.56 | 1.91 | 0.99 | 1.06 | 1.52 | 1.86 | 1.02 | 1.17 | 1.55 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Asset Management Revenue Netof Regulatory Sharing, Northwest Natural Gas Company, Transferred Over Time | 1.66 | 1.33 | 0.60 | 1.06 | 1.62 | 0.50 | 2.75 | 2.02 | 3.05 | 1.14 | 0.75 | 0.63 | 1.01 | 0.82 | 6.93 | 0.53 | 0.94 | 0.91 | 0.15 | 0.53 | 1.21 | 0.46 | 1.51 | 1.57 | 2.71 | 2.14 | 1.58 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Gas Storage Revenue Netof Regulatory Sharing, Northwest Natural Gas Company, Transferred Over Time | 4.52 | 3.07 | 3.00 | 3.03 | 3.01 | 3.20 | 2.80 | 3.11 | 2.88 | 3.04 | 2.76 | 2.74 | 2.79 | 2.81 | 2.50 | 2.49 | 2.48 | 2.45 | 2.34 | 2.38 | 2.33 | 2.74 | 2.78 | 3.59 | 2.42 | 2.74 | 2.58 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Natural Gas Sales, Northwest Natural Gas Company, Transferred Over Time | 106.65 | 183.88 | 410.84 | 325.72 | 117.00 | 215.11 | 451.39 | 366.53 | 95.78 | 190.04 | 337.30 | 279.26 | 83.95 | 123.74 | 296.08 | 241.31 | 78.43 | 116.68 | 274.00 | 240.62 | 80.48 | 112.02 | 296.19 | 215.35 | 82.36 | 114.73 | 258.23 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Otherrevenue, Northwest Natural Gas Company, Transferred Over Time | 0.78 | 0.78 | 0.77 | 0.73 | 0.73 | 0.73 | 0.73 | 0.63 | 0.62 | 0.63 | 0.63 | 0.40 | 0.40 | 0.40 | 0.41 | 0.34 | 0.33 | 0.33 | 0.34 | 0.50 | 0.25 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | NA | NA | NA | NA | |
| Northwest Natural Gas Company, Northwest Natural Gas Company | 114.62 | 189.98 | 416.52 | 331.98 | 123.05 | 220.47 | 458.87 | 373.77 | 103.54 | 196.29 | 343.15 | 284.86 | 89.34 | 129.10 | 307.51 | 246.51 | 83.37 | 121.18 | 278.38 | 245.94 | 85.26 | 116.38 | 301.99 | 222.37 | 88.51 | 120.77 | 263.93 | NA | NA | NA | NA | |
| Appliance Center Revenue, Transferred At Point In Time | 1.01 | 0.93 | 1.30 | 1.44 | 0.68 | 0.93 | 1.19 | 1.48 | 1.20 | 1.44 | 1.72 | 1.83 | 1.19 | 1.34 | 1.59 | 1.84 | 1.19 | 0.81 | 1.56 | 1.91 | 0.99 | 1.06 | 1.52 | 1.86 | 1.02 | 1.17 | 1.55 | NA | NA | NA | NA | |
| Asset Management Revenue Netof Regulatory Sharing, Transferred Over Time | 1.66 | 1.33 | 0.60 | 1.06 | 1.62 | 0.50 | 2.75 | 2.02 | 3.05 | 1.14 | 0.75 | 0.63 | 1.01 | 0.82 | 6.93 | 0.53 | 0.94 | 0.91 | 0.15 | 0.53 | 1.21 | 0.46 | 1.51 | 1.57 | 2.71 | 2.14 | 1.58 | NA | NA | NA | NA | |
| Gas Storage Revenue Netof Regulatory Sharing, Transferred Over Time | 4.52 | 3.07 | 3.00 | 3.03 | 3.01 | 3.20 | 2.80 | 3.11 | 2.88 | 3.04 | 2.76 | 2.74 | 2.79 | 2.81 | 2.50 | 2.49 | 2.48 | 2.45 | 2.34 | 2.38 | 2.33 | 2.74 | 2.78 | 3.59 | 2.42 | 2.74 | 2.58 | NA | NA | NA | NA | |
| Natural Gas Sales, Transferred Over Time | 106.67 | 183.88 | 410.84 | 325.72 | 117.00 | 215.11 | 451.39 | 366.53 | 95.78 | 190.04 | 337.30 | 279.26 | 83.95 | 123.74 | 296.08 | 241.31 | 78.43 | 116.68 | 274.00 | 240.62 | 80.48 | 112.02 | 296.19 | 215.35 | 82.36 | 114.73 | 258.23 | NA | NA | NA | NA | |
| Otherrevenue, Transferred Over Time | 16.17 | 12.31 | 11.47 | 10.63 | 12.27 | 10.24 | 8.64 | 8.84 | 7.04 | 5.34 | 4.31 | 4.40 | 5.81 | 4.74 | 4.01 | 3.91 | 5.25 | 4.15 | 2.96 | 2.50 | 2.97 | 1.30 | 0.50 | 0.56 | 0.01 | 0.00 | 0.00 | NA | NA | NA | NA | |
| Renewable Natural Gas Sales, Transferred Over Time | 0.33 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
