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Income Taxes (Schedule Of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current income tax expense (benefit):      
United States Federal, current income tax expense $ 427 $ 441 $ 501
Various states, current income tax expense 32 27 65
Canada, current income tax expense 0 (3) (7)
Total current income tax expense 459 465 559
Deferred income tax expense:      
United States Federal, deferred income tax expense 267 365 1,090
Various states, deferred income tax expense 44 11 82
Canada,deferred income tax expense 0 0 7
Total deferred income tax expense 311 376 1,179
Total income tax expense $ 770 $ 841 $ 1,738