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Reportable Segments - Financial Data (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers | $ 8,696 | $ 9,321 | $ 8,352
Intersegment Revenues | 0 | 0 |
Depreciation and Amortization | 1,401 | 1,288 | 1,316
Interest income | 9 | 3 |
Interest Expense | (701) | (524) |
Income Tax Expense (Benefit) | 170 | 360 | 110
Net income (loss) | 917 | 1,057 | 1,486
Income (loss) from continuing operations | 917 | 1,057 |
Total Assets | 39,715 | 38,546 |
Expenditures for Long-Lived Assets | 4,370 | 4,418 | 3,399
Interest income from securitization bonds | 4 | 1 | 1
Total Regulatory Assets | 2,674 | 3,578 |
Consolidated |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers |  |  | 8,352
Intersegment Revenues |  |  | 0
Depreciation and Amortization |  |  | 1,316
Interest income |  |  | 3
Interest Expense |  |  | (529)
Income Tax Expense (Benefit) | 170 | 360 | 110
Income (loss) from continuing operations |  |  | 668
Total Assets | 39,715 | 38,546 |
Expenditures for Long-Lived Assets | 4,370 | 4,415 | 3,228
Discontinued Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Income Tax Expense (Benefit) | 0 | 0 | 201
Net income from discontinued operations | 0 | 0 | 818
Total Assets | 0 | 0 |
Expenditures for Long-Lived Assets | 0 | 3 | 171
Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers | 4,290 | 4,108 | 3,763
Natural Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers | 4,276 | 4,946 | 4,336
Corporate and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers | 130 | 267 | 253
Operating Segments | Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers | 4,290 | 4,108 | 3,763
Intersegment Revenues | 0 | 0 | 0
Depreciation and Amortization | 872 | 793 | 775
Interest income | 19 | 4 | 0
Interest Expense | (303) | (235) | (226)
Income Tax Expense (Benefit) | 189 | 147 | 95
Net income (loss) | 654 | 603 | 475
Total Assets | 21,089 | 19,024 |
Expenditures for Long-Lived Assets | 2,660 | 2,611 | 2,008
Operating Segments | Natural Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers | 4,276 | 4,946 | 4,336
Intersegment Revenues | 3 | 0 | 0
Depreciation and Amortization | 513 | 466 | 527
Interest income | 10 | 2 | 1
Interest Expense | (188) | (137) | (141)
Income Tax Expense (Benefit) | (25) | 243 | 80
Net income (loss) | 533 | 492 | 403
Total Assets | 17,429 | 18,043 |
Expenditures for Long-Lived Assets | 1,697 | 1,697 | 1,178
Operating Segments | Corporate and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers | 130 | 267 | 253
Intersegment Revenues | 0 | 0 | 0
Depreciation and Amortization | 16 | 29 | 14
Interest income | 34 | 59 | 118
Interest Expense | (264) | (214) | (278)
Income Tax Expense (Benefit) | 6 | (30) | (65)
Net income (loss) | (270) | (38) | (210)
Total Assets | 1,197 | 1,479 |
Expenditures for Long-Lived Assets | 13 | 107 | 42
Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues from External Customers | 0 | 0 | 0
Intersegment Revenues | (3) | 0 | 0
Depreciation and Amortization | 0 | 0 | 0
Interest income | (54) | (62) | (116)
Interest Expense | 54 | 62 | 116
Income Tax Expense (Benefit) | 0 | 0 | 0
Net income (loss) | 0 | 0 | $ 0
Benefit obligations | Corporate and Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Regulatory Assets | $ 385 | $ 405 |

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