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Stockholders' Equity and Accumulated Other Comprehensive Income (Loss) (Preferred Stock Issuances) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 120 Months Ended
Aug. 15, 2029
Sep. 15, 2025
Mar. 31, 2023
Sep. 15, 2024
Dec. 31, 2022
Class of Stock [Line Items]          
Preferred Stock, Liquidation Preference, Value     $ 1,750    
Preferred stock, shares issued     1,403,500   1,403,500
Preferred stock, shares outstanding     1,403,500    
Preferred Stock, Carrying Amount     $ 1,659   $ 1,659
Series B Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Percentage     6.375%    
Preferred Stock, Liquidation Preference, Value     $ 500    
Preferred stock, liquidation preference per share     $ 1,000,000,000    
Preferred stock, shares issued     500,000    
Preferred stock, shares outstanding     500,000    
Preferred Stock, Carrying Amount     $ 433   433
Series C Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Percentage     5.70%    
Preferred Stock, Liquidation Preference, Value     $ 500    
Preferred stock, liquidation preference per share     $ 1,000,000,000    
Preferred stock, shares issued     500,000    
Preferred stock, shares outstanding     500,000    
Preferred Stock, Carrying Amount     $ 490   490
Series D Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Percentage     5.75%    
Preferred Stock, Liquidation Preference, Value     $ 350    
Preferred stock, liquidation preference per share     $ 100,000,000,000    
Preferred stock, shares issued     3,500    
Preferred stock, shares outstanding     3,500    
Preferred Stock, Carrying Amount     $ 346   346
Series E Preferred Stock          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Percentage     4.45%    
Preferred Stock, Liquidation Preference, Value     $ 400    
Preferred stock, liquidation preference per share     $ 1,000,000,000    
Preferred stock, shares issued     400,000    
Preferred stock, shares outstanding     400,000    
Preferred Stock, Carrying Amount     $ 390   $ 390
Scenario, Forecast | Series B Preferred Stock Dividend Scenario 1 [Member]          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Percentage       6.375%  
Scenario, Forecast | Series C Preferred Stock Dividend Scenario 1 Member [Member]          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Percentage 5.70%        
Scenario, Forecast | Series C Preferred Stock Dividend Scenario 2 Member [Member]          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Basis Spread on Variable Rate, Percentage 3.148%        
Scenario, Forecast | Series D Preferred Stock Dividend Scenario 1 Member [Member]          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Percentage   5.75%      
Plus 3-Month LIBOR [Member] | Scenario, Forecast | Series B Preferred Stock Dividend Scenario 2 [Member]          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Basis Spread on Variable Rate, Percentage       3.536%  
Plus 5-year Treasury rate [Member] | Scenario, Forecast | Series D Preferred Stock Dividend Scenario 2 Member [Member]          
Class of Stock [Line Items]          
Preferred Stock, Dividend Rate, Basis Spread on Variable Rate, Percentage   5.426%      
Depositary Shares [Member] | Series B Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred stock, liquidation preference per share     $ 25,000,000    
Depositary Shares [Member] | Series C Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred stock, liquidation preference per share     25,000,000    
Depositary Shares [Member] | Series D Preferred Stock          
Class of Stock [Line Items]          
Preferred stock, liquidation preference per share     1,000,000,000    
Depositary Shares [Member] | Series E Preferred Stock          
Class of Stock [Line Items]          
Preferred stock, liquidation preference per share     $ 25,000,000