| Fiscal period | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|
| Period End Date | 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 | 12/31/2015 |
|---|
| Revenue | -- | -- | -- | -- | -- | -- | -- | -- | -- | 7,386.00 |
| Utility revenues | 8,589.00 | 8,524.00 | 9,018.00 | 8,042.00 | 7,049.00 | 7,162.00 | 6,163.00 | 5,603.00 | 5,440.00 | -- |
| Non-utility revenues | 54.00 | 172.00 | 303.00 | 310.00 | 369.00 | 5,139.00 | 4,426.00 | 4,011.00 | 2,088.00 | -- |
| Total Revenues | 8,643.00 | 8,696.00 | 9,321.00 | 8,352.00 | 7,418.00 | 12,301.00 | 10,589.00 | 9,614.00 | 7,528.00 | 7,386.00 |
| Fuel and cost of gas sold | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Non-utility cost of revenues, including natural gas | 3.00 | 99.00 | 204.00 | -- | -- | -- | -- | -- | -- | -- |
| Natural gas | -- | -- | -- | -- | -- | -- | -- | -- | -- | 3,102.00 |
| Utility natural gas | 1,715.00 | 2,061.00 | 2,887.00 | 2,127.00 | 1,488.00 | 1,683.00 | 1,410.00 | 1,109.00 | 983.00 | -- |
| Non-utility natural gas | -- | -- | -- | 208.00 | 257.00 | 4,029.00 | 4,364.00 | 3,785.00 | 1,983.00 | -- |
| Purchased power | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Operation and maintenance | 2,949.00 | 2,850.00 | 2,833.00 | 2,810.00 | 2,744.00 | 3,550.00 | 2,335.00 | 2,221.00 | 2,093.00 | 2,007.00 |
| Depreciation and amortization | 1,439.00 | 1,401.00 | 1,288.00 | 1,316.00 | 1,189.00 | 1,287.00 | 1,243.00 | 1,036.00 | 1,126.00 | 970.00 |
| Goodwill impairment | -- | -- | -- | -- | 185.00 | 48.00 | -- | -- | -- | -- |
| Taxes other than income taxes | 547.00 | 525.00 | 543.00 | 528.00 | 516.00 | 478.00 | 406.00 | 391.00 | 384.00 | 374.00 |
| Total Operating Expenses | 6,653.00 | 6,936.00 | 7,755.00 | 6,989.00 | 6,379.00 | 11,075.00 | 9,758.00 | 8,542.00 | -- | 6,453.00 |
| Operating income (loss) | 1,990.00 | 1,760.00 | 1,566.00 | 1,363.00 | 1,039.00 | 1,226.00 | 831.00 | 1,072.00 | 959.00 | 933.00 |
| Interest and other finance charges | 818.00 | 684.00 | 511.00 | 508.00 | 501.00 | 528.00 | 361.00 | 313.00 | 338.00 | 352.00 |
| Interest on transition bonds | 20.00 | 17.00 | 13.00 | 21.00 | 28.00 | 39.00 | 59.00 | 77.00 | 91.00 | 105.00 |
| Step acquisition gain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain / loss on sale | -- | (13.00) | 303.00 | 8.00 | -- | -- | -- | -- | -- | -- |
| Gain (loss) on indexed debt securities | (14.00) | (27.00) | 325.00 | 50.00 | (60.00) | (292.00) | (232.00) | 49.00 | (413.00) | 74.00 |
| Gain (Loss) on merketable Securities | 20.00 | 31.00 | (227.00) | (172.00) | 49.00 | 282.00 | (22.00) | 7.00 | 326.00 | (93.00) |
| Distribution on trust preferred securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Additional distribution to ZENS holders | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Distribution from AOL Time Warner litigation settlement | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Equity in earnings of unconsolidated affiliates | -- | -- | -- | -- | (1,428.00) | 230.00 | 307.00 | 265.00 | 208.00 | (1,633.00) |
| Interest income | -- | -- | -- | -- | 3.00 | -- | -- | -- | -- | -- |
| Interest income from Securitization Bonds | -- | -- | -- | -- | 1.00 | -- | -- | -- | -- | -- |
| Other, net | 56.00 | 37.00 | (26.00) | 58.00 | 60.00 | 50.00 | 50.00 | 60.00 | 35.00 | 46.00 |
| Return on true-up balance | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Other Income (Expense) | (776.00) | (673.00) | (149.00) | (585.00) | (1,904.00) | -- | -- | (9.00) | (273.00) | (2,063.00) |
| Income Before Income Taxes | 1,214.00 | 1,087.00 | 1,417.00 | 778.00 | (865.00) | 929.00 | 514.00 | 1,063.00 | 686.00 | (1,130.00) |
| Income Tax Expense | 195.00 | 170.00 | 360.00 | 110.00 | (274.00) | 138.00 | 146.00 | (729.00) | 254.00 | (438.00) |
| Current federal | -- | -- | 294.00 | -- | -- | -- | -- | -- | -- | (37.00) |
| Current State | -- | -- | 46.00 | -- | -- | -- | -- | -- | -- | 12.00 |
| Deferred Federal | -- | -- | 16.00 | -- | -- | -- | -- | -- | -- | (359.00) |
| Deferred State | -- | -- | 4.00 | -- | -- | -- | -- | -- | -- | (54.00) |
| Foreign | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minority Interest | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from continuing operations before extraordinary item | -- | 917.00 | 1,057.00 | 668.00 | (591.00) | -- | -- | -- | -- | -- |
| Loss on Disposal of Discontinued Operations | -- | -- | -- | 818.00 | (182.00) | -- | -- | -- | -- | -- |
| INCOME(LOSS) FROM DISCONTINUED OPERATIONS | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| INCOME (LOSS) BEFORE EXTRAORDINARY ITEM | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary Item, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| CUMULATIVE EFFECT OF ACCOUNTING CHANGE, NET OF TAX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (loss) before preferred dividends | 1,019.00 | 917.00 | 1,057.00 | 1,486.00 | (773.00) | 791.00 | 368.00 | -- | -- | -- |
| Preferred Dividends | -- | 50.00 | 49.00 | 95.00 | 176.00 | 117.00 | 35.00 | -- | -- | -- |
| Net Income (Loss) Available to Common Shareholders | 1,019.00 | 867.00 | 1,008.00 | 1,391.00 | (949.00) | 674.00 | 333.00 | 1,792.00 | 432.00 | (692.00) |
| Income From Continuing Operations Before Extraordinary | -- | 1.37 | 1.60 | 0.97 | (1.45) | -- | -- | -- | -- | -- |
| Income from Discontinued Operations, net of tax | -- | -- | -- | 1.38 | (0.34) | -- | -- | -- | -- | -- |
| Loss on disposal of Discontinued Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued Operations(Basic) : Income from Reliant Resources | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued Operations(Basic) : Income (loss) from Other Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued Operations(Basic) : Loss on disposal of Other Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative Effect of Accounting Change, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary Item, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Basic earnings per share | 1.58 | 1.37 | 1.60 | 2.35 | (1.79) | 1.34 | 0.74 | 4.16 | 1.00 | (1.61) |
| Income From Continuing Operations Before Extraordinary | -- | 1.37 | 1.59 | 0.94 | (1.45) | -- | -- | -- | -- | -- |
| Income from Discontinued Operations, net of tax | -- | -- | -- | 1.34 | (0.34) | -- | -- | -- | -- | -- |
| Loss on Disposal of Discontinued Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued Operations(Diluted) : Income from Reliant Resources | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued Operations(Diluted) : Income (loss) from Other Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued Operations(Diluted) : Loss on disposal of Other Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative Effect of Accounting Change, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary Item, net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Diluted earnings per share | 1.58 | 1.37 | 1.59 | 2.28 | (1.79) | 1.33 | 0.74 | 4.13 | 1.00 | (1.61) |
| Weighted Average-Basic Shares Outstanding | 643.00 | 631.00 | 629.00 | 593.00 | 531.00 | 502.00 | 449.00 | 431.00 | 431.00 | 430.00 |
| Weighted Average-Diluted Shares Outstanding | 644.00 | 633.00 | 632.00 | 610.00 | 531.00 | 505.00 | 452.00 | 434.00 | 434.00 | 430.00 |