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Income Taxes (Components Of Income Tax (Benefit) Expense) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]      
Current Federal Tax Expense (Benefit) $ 417 $ 493 $ 456
Current State and Local Tax Expense (Benefit) 84 116 73
Current Income Tax Expense (Benefit) 501 609 529
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]      
Deferred Federal Income Tax Expense (Benefit) 25 26 132
Deferred State and Local Income Tax Expense (Benefit) 7 (4) 33
Deferred income tax expense (benefit) 32 22 165
Income tax expense $ 533 $ 631 $ 694