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Condensed Parent Company Financial Statements (Condensed Statements Of Income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating expenses | $ 3,084 | $ 3,277 | $ 2,874
Operating income (loss) | 943 | 928 | 795
Other (income) and deductions: |  |  |
Equity earnings from consolidated subsidiaries | (61) | (51) | (62)
Interest expense | 394 | 325 | 277
Other | 3 | 6 | 5
Total other (income) and deductions | 236 | 220 | 195
Income before income taxes | 707 | 708 | 600
Income tax expense (benefit) | 4 | 22 | (74)
Net income | 703 | 686 | 674
Parent Company [Member] |  |  |
Operating expenses | 3 | 9 | 5
Operating income (loss) | (3) | (9) | (5)
Other (income) and deductions: |  |  |
Equity earnings from consolidated subsidiaries | (742) | (707) | (664)
Interest expense | 34 | 6 | 1
Other | 4 | 1 | 1
Total other (income) and deductions | (704) | (700) | (662)
Income before income taxes | 701 | 691 | 657
Income tax expense (benefit) | (5) | 2 | (5)
Net income | $ 706 | $ 689 | $ 662

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