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v3.25.1

Business Segment Information (Reconciliation of Operating Profit (Loss) from Segments to Consolidated) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Revenues | $ 2,846,874 | $ 2,794,628
Utilities Operating Expense, Fuel Used | 344,522 | 616,617
Utilities Operating Expense, Purchased Power | 345,746 | 228,142
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses | 672,667 | 687,031
Other Regulatory Charges Credits Net | (16,843) | 109,346
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 362,422 | 76,536
Preferred dividend requirements of subsidiaries and net income (loss) attributable to noncontrolling interests | 1,662 | 1,255
Net Income (Loss) Available to Common Stockholders, Basic | 360,760 | 75,281
Operating Segments [Member] | Utility [Member] |  |
Revenues | 2,829,597 | 2,772,173
Utilities Operating Expense, Fuel Used | 338,983 | 604,404
Utilities Operating Expense, Purchased Power | 342,084 | 219,194
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses | 662,474 | 680,715
Other Regulatory Charges Credits Net | (16,843) | 109,346
Segment Reporting, Other Segment Item, Amount | 1,011,857 | 962,534
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 491,042 | 195,980
Operating Segments [Member] | Corporate Segment and Other Operating Segment [Member] |  |
Revenues | 17,303 | 22,476
Consolidation, Eliminations |  |
Revenues | (26) | (21)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | (75,248) | (79,561)
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Corporate Segment and Other Operating Segment [Member] |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ (53,372) | $ (39,883)

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- Definition Amount of operating expense for purchased power of regulated operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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