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v3.25.1

Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Segment Reporting [Abstract] |  |  |
Equity Method Investments | $ 241 |  | $ 246
Segment Reporting Information [Line Items] |  |  |
Electric | 2,835 | $ 2,685 |
Net income | 483 | 488 |
Natural gas | 1,055 | 941 |
Other | 16 | 23 |
Regulated and Unregulated Operating Revenue | 3,906 | 3,649 |
Revenues Including Intersegment Revenues | 3,895 | 3,628 |
Equity Method Investments | 241 |  | 246
Electric fuel and purchased power | 1,020 | 948 |
Cost of natural gas sold and transported | 513 | 483 |
Operating and maintenance expenses | 686 | 605 |
Utilities Operating Expense, Depreciation and Amortization | 728 | 658 |
Other income, net | 7 | 14 |
Interest and Debt Expense | 309 | 277 |
Interest Rate Derivatives, Tax | (61) | (27) |
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income | 537 | 516 |
Regulated Operating Revenue | 3,890 | 3,626 |
Electric fuel and purchased power | 1,020 | 948 |
Cost of natural gas sold and transported | 513 | 483 |
Operating and maintenance expenses | 673 | 608 |
Utilities Operating Expense, Depreciation and Amortization | 724 | 655 |
Other income, net | 228 | 223 |
Interest and Debt Expense | 234 | 213 |
Interest Rate Derivatives, Tax | (34) | (18) |
Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Regulated Operating Revenue | 5 | 2 |
All Other |  |  |
Segment Reporting [Abstract] |  |  |
Equity Method Investments | 156 |  | 161
Segment Reporting Information [Line Items] |  |  |
Net income | (54) | (28) |
Equity Method Investments | 156 |  | 161
Regulated Electric Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues Including Intersegment Revenues | 2,835 | 2,686 |
Regulated Electric Segment | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Electric | 2,835 | 2,685 |
Net income | 342 | 358 |
Electric fuel and purchased power | 1,020 | 948 |
Cost of natural gas sold and transported | 0 | 0 |
Operating and maintenance expenses | 567 | 503 |
Utilities Operating Expense, Depreciation and Amortization | 625 | 568 |
Other income, net | 172 | 190 |
Interest and Debt Expense | 204 | 186 |
Interest Rate Derivatives, Tax | (95) | (67) |
Regulated Electric Segment | Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Electric | 0 | 1 |
Regulated Natural Gas Segment |  |  |
Segment Reporting [Abstract] |  |  |
Equity Method Investments | 85 |  | 85
Segment Reporting Information [Line Items] |  |  |
Revenues Including Intersegment Revenues | 1,060 | 942 |
Equity Method Investments | 85 |  | $ 85
Regulated Natural Gas Segment | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income | 195 | 158 |
Natural gas | 1,055 | 941 |
Electric fuel and purchased power | 0 | 0 |
Cost of natural gas sold and transported | 513 | 483 |
Operating and maintenance expenses | 106 | 105 |
Utilities Operating Expense, Depreciation and Amortization | 99 | 87 |
Other income, net | 56 | 33 |
Interest and Debt Expense | 30 | 27 |
Interest Rate Derivatives, Tax | 61 | 49 |
Regulated Natural Gas Segment | Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Natural gas | $ 5 | $ 1 |

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