| 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 |
|---|
| Electric utility | 3,071.18 | 3,206.70 | 3,269.52 | 3,408.59 | 2,539.64 | 2,265.32 | 2,545.94 | 2,546.53 | 2,257.57 | 2,094.37 |
| Revenues: Other | 15.71 | 13.15 | 17.98 | 12.33 | 4.35 | 0.94 | 0.09 | 0.05 | 0.42 | 0.36 |
| Bank | -- | -- | 394.66 | 321.07 | 306.40 | 313.51 | 328.57 | 314.28 | 297.64 | 285.92 |
| Total revenues | 3,086.90 | 3,219.85 | 3,682.17 | 3,741.99 | 2,850.38 | 2,579.78 | 2,874.60 | 2,860.85 | 2,555.63 | 2,380.65 |
| Electric utility | 2,791.40 | 4,818.56 | 2,967.36 | 3,109.40 | 2,260.08 | 1,996.77 | 2,291.56 | 2,304.86 | 2,000.05 | 1,809.90 |
| Other | 60.18 | 108.05 | 45.15 | 31.97 | 26.04 | 19.81 | 17.36 | 16.59 | 18.37 | 24.01 |
| Bank | -- | -- | 317.05 | 219.55 | 178.20 | 251.70 | 217.01 | 206.04 | 198.92 | 198.57 |
| Total Operating Expenses | 2,851.57 | 4,926.61 | 3,329.56 | 3,360.91 | 2,464.31 | 2,268.28 | 2,525.93 | 2,527.49 | 2,217.33 | 2,032.48 |
| Total operating income | 235.32 | (1,706.76) | 352.60 | 381.07 | 386.07 | 311.49 | 348.67 | 333.36 | 338.29 | 348.18 |
| Interest expense - other than on deposit liabilities and other bank borrowings | 117.33 | 127.21 | 125.53 | 103.40 | 94.36 | 88.69 | 90.90 | 88.68 | 78.97 | 75.80 |
| Merger termination fee | -- | -- | -- | -- | -- | -- | -- | -- | -- | 90.00 |
| Gain on sale of investment securities | (12.38) | -- | (15.61) | 8.12 | 0.53 | 9.28 | -- | -- | -- | -- |
| Preferred stock dividends of subsidiaries | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Preferred securities distributions of trust subsidiaries | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest income | 36.93 | 19.36 | 9.11 | -- | -- | -- | -- | -- | -- | -- |
| Allowance for equity funds used during construction | 15.01 | 13.79 | 15.16 | 10.57 | 9.53 | 8.77 | 11.99 | 10.88 | 12.48 | 8.33 |
| Allowance for borrowed funds used during construction | 5.89 | 5.47 | 5.20 | 3.42 | 3.25 | 2.99 | 4.45 | 4.87 | 4.78 | 3.14 |
| Retirement defined benefits expense-other than service costs | 3.48 | 3.75 | 4.77 | 4.41 | 5.85 | (3.21) | (2.81) | (5.96) | -- | -- |
| Income from before income taxes | 166.93 | (1,791.60) | 245.70 | 304.20 | 310.86 | 240.62 | 271.41 | 254.46 | 276.58 | 373.84 |
| Provision for Income taxes | 40.65 | (470.96) | 44.57 | 61.17 | 62.81 | 40.91 | 51.64 | 50.80 | 109.39 | 123.70 |
| Deferred : Federal | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred : State | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Current : Federal | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Current : State | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred tax credits : Federal | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deferred tax credits : State | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from continuing operations | 126.28 | (1,320.63) | -- | -- | -- | -- | -- | -- | -- | -- |
| LOSS FROM DISCONTINUED OPERATIONS | -- | (103.49) | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued operations - loss on disposal, net of income tax benefits | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Consolidated Net Income (Loss) | -- | -- | 201.13 | 243.03 | 248.06 | 199.71 | 219.77 | -- | 167.19 | 250.15 |
| Less net income attributable to noncontrolling interest - preferred stock of subsidiaries | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Income (Loss) Attributable to Parent Company | -- | -- | -- | -- | -- | -- | -- | 203.66 | -- | -- |
| Preferred stock dividends of subsidiaries | 3.16 | 1.89 | 1.89 | 1.89 | 1.89 | 1.89 | 1.89 | 1.89 | 1.89 | 1.89 |
| Net income for common stock | 123.12 | (1,426.01) | 199.24 | 241.14 | 246.17 | 197.82 | 217.88 | 201.77 | 165.30 | 248.26 |
| EPS (Basic) : Continuing operations | 0.71 | (10.42) | -- | -- | -- | -- | -- | -- | -- | -- |
| EPS (Basic) : Discontinued operations | -- | (0.81) | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (BASIC) | 0.71 | (11.23) | 1.82 | 2.20 | 2.25 | 1.81 | 2.00 | 1.85 | 1.52 | 2.30 |
| EPS (Diluted) : Continuing operations | 0.71 | (10.42) | -- | -- | -- | -- | -- | -- | -- | -- |
| EPS (Diluted) : Discontinued operations | -- | (0.81) | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (DILUTED) | 0.71 | (11.23) | 1.81 | 2.20 | 2.25 | 1.81 | 1.99 | 1.85 | 1.52 | 2.29 |
| Weighted Average Shares Outstanding (Basic) | 172.55 | 126.93 | 109.74 | 109.43 | 109.28 | 109.14 | 108.95 | 108.86 | 108.75 | 108.10 |
| Weighted Average Shares Outstanding (Diluted) | 173.02 | 126.93 | 110.04 | 109.78 | 109.58 | 109.36 | 109.41 | 109.15 | 108.93 | 108.31 |