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Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
$ / shares
Jun. 30, 2023
USD ($)
$ / shares
Mar. 31, 2023
USD ($)
$ / shares
shares
Sep. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Sep. 30, 2023
USD ($)
$ / shares
Sep. 30, 2022
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 $ 25 $ 25 $ 24 $ 25 $ 25 $ 24          
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum 0.025           0.025        
Stock Repurchase Program, Authorized Amount                     $ 2,500
Shares repurchased (in shares) | shares     725                
Stock Repurchased During Period, Value             $ 15        
Cash dividend declared (in dollars per share) | $ / shares $ 0.24 $ 0.20 $ 0.20       $ 0.64 $ 0.54      
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             $ 74 $ 74