| 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 |
|---|
| Electric and gas trading | -- | -- | -- | -- | -- | -- | -- | 9,676.00 | 9,499.78 | 9,275.99 |
| Natural gas utility | 2,230.00 | 2,645.00 | 3,080.00 | 2,132.00 | 1,636.00 | 1,868.00 | 1,739.00 | 1,650.00 | 1,531.41 | 1,672.08 |
| Electric utility | 11,147.00 | 11,446.00 | 12,123.00 | 11,205.00 | 9,802.00 | 9,575.00 | 9,719.00 | -- | -- | -- |
| Nonregulated and other | 64.00 | 115.00 | 107.00 | 94.00 | 88.00 | 86.00 | 79.00 | 78.00 | 75.73 | 76.42 |
| Equity earnings from investments in affiliates | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Revenues | 13,441.00 | 14,206.00 | 15,310.00 | 13,431.00 | 11,526.00 | 11,529.00 | 11,537.00 | 11,404.00 | 11,106.92 | 11,024.49 |
| Cost of sales - nonregulated and other | 14.00 | 49.00 | 44.00 | 38.00 | 37.00 | 40.00 | 35.00 | 34.00 | 36.08 | 36.22 |
| Cost of natural gas sold and transported - utility | 951.00 | 1,456.00 | 1,910.00 | 1,081.00 | 689.00 | 918.00 | 843.00 | 823.00 | 732.69 | 904.79 |
| Electric fuel and purchased power - utility | 3,788.00 | 4,278.00 | 5,005.00 | 4,733.00 | 3,512.00 | 3,510.00 | 3,854.00 | 3,757.00 | 3,717.69 | 3,762.95 |
| Other operating and maintenance expenses - utility | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other operating and maintenance expenses - nonregulated | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Electric and gas trading costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other operating and maintenance expenses | 2,540.00 | 2,444.00 | 2,491.00 | 2,321.00 | 2,324.00 | 2,338.00 | 2,352.00 | 2,303.00 | 2,326.56 | 2,329.67 |
| Depreciation and amortization | 2,744.00 | 2,448.00 | 2,413.00 | 2,121.00 | 1,948.00 | 1,765.00 | 1,642.00 | 1,479.00 | 1,303.20 | 1,124.52 |
| Taxes (other than income taxes) | 624.00 | 657.00 | 688.00 | 630.00 | 612.00 | 569.00 | 556.00 | 545.00 | 532.07 | 511.68 |
| Special charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Workforce reduction expenses | -- | (72.00) | -- | -- | -- | -- | -- | -- | -- | -- |
| Conservation and demand-side management program expenses | (394.00) | (286.00) | (331.00) | (304.00) | (288.00) | (285.00) | (290.00) | (273.00) | (244.78) | (224.68) |
| Loss on Monticello life cycle management/extended power uprate project | -- | -- | -- | -- | -- | -- | -- | -- | -- | (129.46) |
| Loss on Comanche Unit 3 litigation | -- | (35.00) | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Operating Expenses | 11,055.00 | 11,725.00 | 12,882.00 | 11,228.00 | 9,410.00 | 9,425.00 | 9,572.00 | 9,214.00 | 8,893.07 | 9,023.97 |
| Operating income (loss) | 2,386.00 | 2,481.00 | 2,428.00 | 2,203.00 | 2,116.00 | 2,104.00 | 1,965.00 | 2,190.00 | 2,213.86 | 2,000.51 |
| Interest charges | 1,255.00 | 1,055.00 | 953.00 | 842.00 | 840.00 | 773.00 | 700.00 | 663.00 | 646.91 | 595.28 |
| Interest and penalties related to COLI settlement | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Allowance for funds used during construction- debt | -- | (51.00) | -- | -- | -- | -- | -- | -- | -- | (26.25) |
| Writedowns and disposal losses from investments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Distributions on redeemable preferred securities of subsidiary trusts | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Equity earnings of unconsolidated subsidiaries | 19.00 | 35.00 | 36.00 | 62.00 | 40.00 | 39.00 | 35.00 | 30.00 | 42.12 | 34.39 |
| Interest and other income, net | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Allowance for funds used during construction- equity | 168.00 | 91.00 | 75.00 | 73.00 | 115.00 | 77.00 | 108.00 | 75.00 | 60.55 | 55.94 |
| Allowance for funds used during construction- debt | 73.00 | -- | 28.00 | 26.00 | 42.00 | 37.00 | 48.00 | 35.00 | 27.03 | -- |
| Other non-operating income | 143.00 | 22.00 | (13.00) | 5.00 | (6.00) | 16.00 | -- | 23.00 | 7.95 | 5.40 |
| Other non-operating expense | -- | -- | -- | -- | -- | -- | (14.00) | -- | -- | -- |
| Interest and other income, net | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from Continuing Operations Before Income Taxes | 1,534.00 | 1,625.00 | 1,601.00 | 1,527.00 | 1,467.00 | 1,500.00 | 1,442.00 | 1,690.00 | 1,704.60 | 1,527.20 |
| Provision for Income taxes | (402.00) | (146.00) | (135.00) | (70.00) | (6.00) | 128.00 | 181.00 | 542.00 | 581.22 | 542.72 |
| Current federal tax expense | 36.00 | 113.00 | 1.00 | 15.00 | (13.00) | (16.00) | (34.00) | 1.00 | (2.81) | (36.13) |
| Current state tax expense (benefit) | 28.00 | 16.00 | 3.00 | (2.00) | 2.00 | 4.00 | 8.00 | (11.00) | (3.35) | 2.32 |
| Current tax credits | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred federal tax expense | (510.00) | (331.00) | (239.00) | (183.00) | (89.00) | 55.00 | 122.00 | 460.00 | 476.44 | 480.08 |
| Deferred state tax expense | 46.00 | 75.00 | 96.00 | 99.00 | 91.00 | 83.00 | 85.00 | 107.00 | 112.31 | 92.13 |
| Deferred tax credits | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred investment tax credits | (4.00) | (5.00) | (4.00) | (5.00) | (5.00) | (5.00) | (5.00) | -- | -- | -- |
| Current foreign tax expense | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred foreign tax expense | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Current FIN48 tax expense | 2.00 | (21.00) | 5.00 | 1.00 | 18.00 | 2.00 | (6.00) | -- | -- | -- |
| Deferred FIN48 tax expense | -- | 7.00 | 3.00 | 5.00 | (10.00) | 5.00 | 11.00 | -- | -- | -- |
| Minority Interest | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from discontinued operations - net of tax | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income Before Extraordinary Income & Accounting Change | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary items | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Consolidated Net Income (Loss) | 1,936.00 | -- | -- | -- | -- | -- | 1,261.00 | -- | 1,123.38 | -- |
| Dividend requirements on preferred stock | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Premium on redemption of preferred stock | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings available to common shareholders | 1,936.00 | 1,771.00 | 1,736.00 | 1,597.00 | 1,473.00 | 1,372.00 | 1,261.00 | 1,148.00 | 1,123.38 | 984.49 |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (loss) from discontinued operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary items | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings per share - basic | 3.44 | 3.21 | 3.18 | 2.96 | 2.79 | 2.64 | 2.47 | 2.26 | 2.21 | 1.94 |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (loss) from discontinued operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary items | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings per share - Diluted | 3.44 | 3.21 | 3.17 | 2.96 | 2.79 | 2.64 | 2.47 | 2.25 | 2.21 | 1.94 |
| Weighted Average Shares Outstanding (Basic) | 563.00 | 552.00 | 547.00 | 539.00 | 527.00 | 519.00 | 511.00 | 509.00 | 508.79 | 507.77 |
| Weighted Average Shares Outstanding (Diluted) | 563.00 | 552.00 | 547.00 | 540.00 | 528.00 | 520.00 | 511.00 | 509.00 | 509.47 | 508.17 |