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Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended 20 Months Ended
Dec. 31, 2023
USD ($)
$ / shares
Dec. 31, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
shares
Sep. 15, 2025
USD ($)
Sep. 15, 2024
USD ($)
Apr. 20, 2022
USD ($)
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]              
Preferred stock dividends $ 98 $ 99 $ 108        
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum 0.025     0.025      
Stock Repurchase Program, Authorized Amount             $ 2,500
Stock Repurchased During Period, Value       $ 267      
Cash dividend declared (in dollars per share) | $ / shares $ 0.88 $ 0.74 $ 0.65        
Stock Repurchased During Period, Shares | shares       17      
Series B Preferred Stock [Member] | Subsequent Event [Member]              
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]              
ExcessofRedemptionAmountOverCarryingAmount           $ 67  
PreferredDividendsReductiontoRetainedEarningsatRedemption           52  
Series C Preferred Stock [Member] | Subsequent Event [Member]              
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]              
ExcessofRedemptionAmountOverCarryingAmount           $ 10  
Series D Preferred Stock | Subsequent Event [Member]              
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]              
ExcessofRedemptionAmountOverCarryingAmount         $ 4    
Series E Preferred Stock | Subsequent Event [Member]              
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]              
ExcessofRedemptionAmountOverCarryingAmount         $ 10    
us-gaap_SeriesAandBandCPreferredStockMember              
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]              
Preferred stock dividends $ 98 $ 99