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Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details)
$ / shares in Units, shares in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
Sep. 15, 2025
USD ($)
Sep. 15, 2024
USD ($)
Apr. 20, 2022
USD ($)
Apr. 21, 2021
USD ($)
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
Preferred stock dividends     $ 99,000,000 $ 108,000,000 $ 103,000,000        
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum 0.025   0.0250            
Stock Repurchase Program, Authorized Amount               $ 2,500,000,000 $ 2,500,000,000
Shares repurchased (in shares) | shares   9,100 725            
Stock Repurchased During Period, Value $ 15,000,000 $ 215,000,000   20,800,000          
Impact of share repurchase, value     $ (230,000,000) $ (467,000,000)          
Stock Repurchased during period related to the Company's deferred investment plan for its directors | shares       1,000          
Cash dividend declared (in dollars per share) | $ / shares     $ 0.74 $ 0.65 $ 0.62        
Series D Preferred Stock                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
Preferred stock dividends       $ 11,000,000          
Series D Preferred Stock | Subsequent Event [Member]                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
ExcessofRedemptionAmountOverCarryingAmount           $ 4,000,000      
Preferred Stock [Member]                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
Preferred stock dividends       108,000,000          
us-gaap_SeriesAandBandCPreferredStockMember                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
Preferred stock dividends     $ 81,000,000 81,000,000          
Series E Preferred Stock                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
Preferred stock dividends     $ 18,000,000            
Series E Preferred Stock | Subsequent Event [Member]                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
ExcessofRedemptionAmountOverCarryingAmount           $ 10,000,000      
Series B Preferred Stock [Member] | Subsequent Event [Member]                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
ExcessofRedemptionAmountOverCarryingAmount             $ 67,000,000    
PreferredDividendsReductiontoRetainedEarningsatRedemption             52,000,000    
Series C Preferred Stock [Member] | Subsequent Event [Member]                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
ExcessofRedemptionAmountOverCarryingAmount             $ 10,000,000    
Series A Preferred Stock [Member]                  
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]                  
Preferred stock dividends       $ 16,000,000