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v3.20.4

Condensed Parent Company Financial Statements (Condensed Statements Of Income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating expenses | $ 2,676 | $ 2,870 | $ 2,840
Operating income (loss) | 740 | 778 | 694
Other (income) and deductions: |  |  |
Equity earnings from consolidated subsidiaries | (61) | (53) | (55)
Interest expense | 275 | 273 | 247
Total other (income) and deductions | 173 | 142 | 124
Income before income taxes | 567 | 636 | 570
Income tax benefit | (57) | 69 | 48
Net income | 624 | 567 | 522
Parent Company [Member] |  |  |
Operating expenses | 7 | 2 | 5
Operating income (loss) | (7) | (2) | (5)
Other (income) and deductions: |  |  |
Equity earnings from consolidated subsidiaries | (625) | (562) | (523)
Interest expense | 2 | 9 | 4
Other | 4 | 7 | 2
Total other (income) and deductions | (619) | (546) | (517)
Income before income taxes | 612 | 544 | 512
Income tax benefit | (4) | (15) | (1)
Net income | $ 616 | $ 559 | $ 513

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