| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
| Period End Date | 12/31/2025 | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 |
| Revenue | 12,168.00 | 10,290.00 | 11,237.00 | 9,800.00 | 9,722.00 | 9,603.00 | 10,076.00 | 9,696.00 | 9,084.00 | 9,061.00 |
| Trading | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gas | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Electric | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Revenues: Other | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Revenues | 12,168.00 | 10,290.00 | 11,237.00 | 9,800.00 | 9,722.00 | 9,603.00 | 10,076.00 | 9,696.00 | 9,084.00 | 9,061.00 |
| Gas Costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Energy Costs | 4,159.00 | 3,393.00 | 3,260.00 | 4,018.00 | 3,499.00 | 3,056.00 | 3,372.00 | 3,225.00 | 2,800.00 | 3,001.00 |
| Operation and maintenance | 3,772.00 | 3,356.00 | 3,150.00 | 3,178.00 | 3,226.00 | 3,115.00 | 3,111.00 | 3,015.00 | 2,869.00 | 3,008.00 |
| Trading Costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Depreciation and amortization | 1,257.00 | 1,182.00 | 1,135.00 | 1,100.00 | 1,216.00 | 1,285.00 | 1,248.00 | 1,158.00 | 1,986.00 | 1,476.00 |
| Taxes other than income taxes | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss on Asset Dispositions | -- | (6.00) | (7.00) | (123.00) | (2,637.00) | 123.00 | (402.00) | -- | -- | -- |
| Total Operating Expenses | 9,188.00 | 7,937.00 | 7,552.00 | 8,419.00 | 10,578.00 | 7,333.00 | 8,133.00 | 7,398.00 | 7,655.00 | 7,485.00 |
| Operating income (loss) | 2,980.00 | 2,353.00 | 3,685.00 | 1,381.00 | (856.00) | 2,270.00 | 1,943.00 | 2,298.00 | 1,429.00 | 1,576.00 |
| Interest expense | 1,005.00 | 882.00 | 748.00 | 628.00 | 571.00 | 600.00 | 569.00 | 476.00 | 391.00 | 385.00 |
| Write-down of Project Investments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Write-down of Assets | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other Than Temporary Impairments | -- | -- | -- | -- | -- | -- | -- | -- | 12.00 | 28.00 |
| NetGains (Losses) on Trust Investments | 189.00 | 127.00 | 189.00 | (265.00) | 194.00 | 253.00 | 260.00 | (143.00) | -- | -- |
| Preferred Stock Dividends | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from equity method investments | -- | 1.00 | 1.00 | 14.00 | 16.00 | 14.00 | 14.00 | 15.00 | 14.00 | 11.00 |
| Gain (Loss) on Sale of and (Impairment) on Equity Method Investments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other income | 145.00 | 153.00 | 172.00 | 124.00 | 98.00 | 115.00 | 125.00 | 85.00 | 319.00 | 191.00 |
| Other deductions | -- | -- | -- | -- | -- | -- | -- | -- | (91.00) | (67.00) |
| Loss on extinguishment of debt | -- | -- | -- | 0.00 | (298.00) | -- | -- | -- | -- | -- |
| Non-Operating Pension and OPEB Credits (Costs) | 65.00 | 73.00 | (218.00) | 376.00 | 328.00 | 249.00 | 177.00 | 76.00 | -- | -- |
| Pre-Tax Income | 2,374.00 | 1,825.00 | 3,081.00 | 1,002.00 | (1,089.00) | 2,301.00 | 1,950.00 | 1,855.00 | 1,268.00 | 1,298.00 |
| Provision for Income Taxes - Total | 263.00 | 53.00 | 518.00 | (29.00) | (441.00) | 396.00 | 257.00 | 417.00 | (306.00) | 411.00 |
| Current - Federal | 170.00 | (225.00) | 144.00 | 262.00 | 407.00 | 385.00 | 84.00 | (97.00) | 86.00 | -- |
| Deferred - Federal | (48.00) | 129.00 | 109.00 | (335.00) | (700.00) | (164.00) | 3.00 | 373.00 | (482.00) | -- |
| Investment Tax Credit (ITC) | (6.00) | (6.00) | -- | (6.00) | (9.00) | (14.00) | 20.00 | (13.00) | 29.00 | -- |
| Current - State | (7.00) | 15.00 | 19.00 | (30.00) | (3.00) | 48.00 | 18.00 | 83.00 | (31.00) | -- |
| Deferred - State | 154.00 | 140.00 | 253.00 | 80.00 | (136.00) | 141.00 | 132.00 | 71.00 | 92.00 | -- |
| Deferred - Foreign | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Current - Foreign | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Foreign | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (Loss) from Continuing Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (Loss) from Discontinued Operations, Net of Tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain on Disposal of Discontinued Operations, net of tax (expense) benefit | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income Before Extraordinary Income & Accounting Change | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary item, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative Effect of a Change in Accounting Principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Income (Loss) available to limited partners shareholders | 2,111.00 | 1,772.00 | 2,563.00 | 1,031.00 | (648.00) | 1,905.00 | 1,693.00 | 1,438.00 | 1,574.00 | 887.00 |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss from Discontinued Operations, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative Effect of a Change in Accounting Principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary Item | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (BASIC) | 4.23 | 3.56 | 5.15 | 2.07 | (1.29) | 3.78 | 3.35 | 2.85 | 3.12 | 1.76 |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss from Discontinued Operations, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative Effect of a Change in Accounting Principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary Item | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (DILUTED) | 4.22 | 3.54 | 5.13 | 2.06 | (1.29) | 3.76 | 3.33 | 2.83 | 3.10 | 1.75 |
| Weighted Average Shares Outstanding (Basic) | 499.00 | 498.00 | 498.00 | 498.00 | 504.00 | 504.00 | 504.00 | 504.00 | 505.00 | 505.00 |
| Weighted Average Shares Outstanding (Diluted) | 501.00 | 500.00 | 500.00 | 501.00 | 504.00 | 507.00 | 507.00 | 507.00 | 507.00 | 508.00 |
| DIVIDENDS PAID PER SHARE OF COMMON STOCK | 2.52 | 2.40 | 2.28 | 2.16 | 2.04 | 1.96 | 1.88 | 1.80 | 1.72 | 1.64 |