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Earnings Per Common Share (Computation Of Basic And Diluted Earnings (Loss) Per Common Share) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Numerator:      
Net income $ 1,893 $ 2,074 $ 2,245
Preferred stock dividends and other(1) (119) (98) (99)
Net income available to common shareholders $ 1,774 $ 1,976 $ 2,146
Denominator:      
Weighted-average common shares outstanding—basic 916 936 935
Potential common shares 2 2 7
Weighted-average common shares outstanding—diluted 918 938 942
Earnings per common share:      
Basic $ 1.94 $ 2.11 $ 2.29
Diluted $ 1.93 $ 2.11 $ 2.28
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 5 6 4
Retained Earnings      
Numerator:      
Net income $ 1,893 $ 2,074 $ 2,245
Series B(2)      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
ExcessofRedemptionAmountOverCarryingAmount $ 15