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Equity - Schedule of Preferred Stock (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Sep. 08, 2008
Jun. 04, 2008
May 22, 2008
May 19, 2008
Dec. 14, 2007
Nov. 21, 2007
Class of Stock [Line Items]                  
Senior preferred stock value $ 120,836,000,000 $ 120,836,000,000              
Preferred stock, shares issued 555,374,922 555,374,922              
Preferred stock $ 19,130,000,000 $ 19,130,000,000              
Preferred stock, redemption terms two                
Preferred stock, shares outstanding 555,374,922 555,374,922              
Liquidation preference $ 163,700,000,000                
Series 2008-2                  
Class of Stock [Line Items]                  
Senior preferred stock issued, shares 1,000,000 1,000,000              
Senior preferred stock value $ 120,836,000,000 $ 120,836,000,000              
Senior preferred stock, stated value per share (in dollars per share) $ 120,836     $ 1,000          
Aggregate liquidation preference of senior preferred stock       $ 1,000,000,000          
Series D                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 3,000,000 3,000,000              
Preferred stock $ 150,000,000 $ 150,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 5.25%                
Series E                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 3,000,000 3,000,000              
Preferred stock $ 150,000,000 $ 150,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 5.10%                
Series F                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 14,000,000 14,000,000              
Preferred stock $ 690,000,000 $ 690,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 0.15%                
Series G                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 6,000,000 6,000,000              
Preferred stock $ 288,000,000 $ 288,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 0.00%                
Series H                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 8,000,000 8,000,000              
Preferred stock $ 400,000,000 $ 400,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 5.81%                
Series I                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 6,000,000 6,000,000              
Preferred stock $ 300,000,000 $ 300,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 5.375%                
Series L                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 7,000,000 7,000,000              
Preferred stock $ 345,000,000 $ 345,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 5.125%                
Series M                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 9,000,000 9,000,000              
Preferred stock $ 460,000,000 $ 460,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 4.75%                
Series N                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 5,000,000 5,000,000              
Preferred stock $ 225,000,000 $ 225,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 5.50%                
Series O                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 50,000,000 50,000,000              
Preferred stock $ 2,500,000,000 $ 2,500,000,000              
Preferred stock, stated value per share (in dollars per share) $ 50                
Preferred stock, annual dividend rate 7.00%                
Convertible Series 2004-1                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 24,922 24,922              
Preferred stock $ 2,492,000,000 $ 2,492,000,000              
Preferred stock, stated value per share (in dollars per share) $ 100,000                
Preferred stock, annual dividend rate 5.375%                
Preferred stock, shares outstanding 24,922 24,922              
Series P                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 40,000,000 40,000,000              
Preferred stock $ 1,000,000,000 $ 1,000,000,000              
Preferred stock, stated value per share (in dollars per share) $ 25                
Preferred stock, annual dividend rate 4.50%                
Series Q                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 15,000,000 15,000,000              
Preferred stock $ 375,000,000 $ 375,000,000              
Preferred stock, stated value per share (in dollars per share) $ 25                
Preferred stock, annual dividend rate 6.75%                
Series R                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 21,000,000 21,000,000           1,200,000 20,000,000
Preferred stock $ 530,000,000 $ 530,000,000           $ 30,000,000 $ 500,000,000
Preferred stock, stated value per share (in dollars per share) $ 25                
Preferred stock, annual dividend rate 7.625%                
Series S                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 280,000,000 280,000,000              
Preferred stock $ 7,000,000,000 $ 7,000,000,000              
Preferred stock, stated value per share (in dollars per share) $ 25                
Preferred stock, annual dividend rate 7.75%                
Series T                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 89,000,000 89,000,000     1,000,000 8,000,000 80,000,000    
Preferred stock $ 2,225,000,000 $ 2,225,000,000       $ 200,000,000 $ 2,000,000,000    
Preferred stock, stated value per share (in dollars per share) $ 25                
Preferred stock, annual dividend rate 8.25%                
Liquidation preference         $ 25,000,000        
Maximum | Series F                  
Class of Stock [Line Items]                  
Preferred stock, annual dividend rate 11.00%                
Maximum | Series G                  
Class of Stock [Line Items]                  
Preferred stock, annual dividend rate 11.00%                
Minimum | Series O                  
Class of Stock [Line Items]                  
Preferred stock, annual dividend rate 7.00%                
Minimum | Series P                  
Class of Stock [Line Items]                  
Preferred stock, annual dividend rate 4.50%                
Minimum | Series S                  
Class of Stock [Line Items]                  
Preferred stock, annual dividend rate 7.75%                
Two-year Constant Maturity U.S. Treasury Rate | Series F                  
Class of Stock [Line Items]                  
Preferred stock dividend rate, basis spread on variable rate 0.16%                
Two-year Constant Maturity U.S. Treasury Rate | Series G                  
Class of Stock [Line Items]                  
Preferred stock dividend rate, basis spread on variable rate 0.18%                
Ten-year Constant Maturity U.S. Treasury Rate | Series O                  
Class of Stock [Line Items]                  
Preferred stock dividend rate, basis spread on variable rate 2.375%                
Three-Month LIBOR | Series P                  
Class of Stock [Line Items]                  
Preferred stock dividend rate, basis spread on variable rate 0.75%                
Three-Month LIBOR | Series S                  
Class of Stock [Line Items]                  
Preferred stock dividend rate, basis spread on variable rate 4.23%                
US Treasury                  
Class of Stock [Line Items]                  
Capital reserve amount for the fiscal year based on the amended Senior Preferred Stock Purchase agreement     $ 25,000,000,000            
Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares issued 556,000,000 556,000,000