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v3.23.1

Report of Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Operating revenues | $ 557.2 | $ 589.3 |
Fuel, purchased power and direct transmission expense | 200.6 | 255.7 |
Other operation and maintenance | 130.4 | 115.0 |
Depreciation and amortization | 121.2 | 107.4 |
Taxes other than income | 28.5 | 28.1 |
OPERATING INCOME | 76.5 | 83.1 |
Gain on equity securities | 0.0 | 282.3 |
Other income (expense) | 16.4 | 9.3 |
Interest expense | 47.8 | 40.1 |
Income tax expense | 6.8 | 55.1 |
Net income (loss) | 38.3 | 279.5 |
Total assets | 12,790.3 | 13,093.6 | $ 12,544.7
Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating revenues | 0.0 | 0.0 |
Fuel, purchased power and direct transmission expense | 0.0 | 0.0 |
Other operation and maintenance | 0.0 | 0.0 |
Depreciation and amortization | 0.0 | 0.0 |
Taxes other than income | 0.0 | 0.0 |
OPERATING INCOME | 0.0 | 0.0 |
Gain on equity securities |  | 0.0 |
Other income (expense) | (3.4) | (0.1) |
Interest expense | (3.4) | (0.1) |
Income tax expense | 0.0 | 0.0 |
Net income (loss) | 0.0 | 0.0 |
Total assets | (559.5) | (194.9) |
Electrics Company [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating revenues | 557.2 | 589.3 |
Fuel, purchased power and direct transmission expense | 200.6 | 255.7 |
Other operation and maintenance | 131.5 | 115.5 |
Depreciation and amortization | 121.2 | 107.4 |
Taxes other than income | 27.1 | 26.8 |
OPERATING INCOME | 76.8 | 83.9 |
Gain on equity securities |  | 0.0 |
Other income (expense) | 15.3 | 0.7 |
Interest expense | 45.7 | 38.2 |
Income tax expense | 6.6 | 7.4 |
Net income (loss) | 39.8 | 39.0 |
Total assets | 12,762.7 | 11,898.8 |
Natural Gas Midstream Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating revenues |  | 0.0 |
Fuel, purchased power and direct transmission expense |  | 0.0 |
Other operation and maintenance |  | 0.7 |
Depreciation and amortization |  | 0.0 |
Taxes other than income |  | 0.0 |
OPERATING INCOME |  | (0.7) |
Gain on equity securities |  | 282.3 |
Other income (expense) |  | 8.7 |
Interest expense |  | 0.0 |
Income tax expense |  | 60.2 |
Net income (loss) |  | 230.1 |
Total assets |  | 1,068.8 |
Other Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating revenues | 0.0 | 0.0 |
Fuel, purchased power and direct transmission expense | 0.0 | 0.0 |
Other operation and maintenance | (1.1) | (1.2) |
Depreciation and amortization | 0.0 | 0.0 |
Taxes other than income | 1.4 | 1.3 |
OPERATING INCOME | (0.3) | (0.1) |
Gain on equity securities |  | 0.0 |
Other income (expense) | 4.5 | 0.0 |
Interest expense | 5.5 | 2.0 |
Income tax expense | 0.2 | (12.5) |
Net income (loss) | (1.5) | 10.4 |
Total assets | $ 587.1 | $ 320.9 |

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