v3.21.2
Shareholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 10, 2026
Sep. 29, 2021
Sep. 01, 2021
Jul. 12, 2021
Jul. 07, 2021
Apr. 13, 2021
Jul. 31, 2021
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Equity [Line Items]                          
Common stock, shares authorized               4,000,000,000.00     4,000,000,000.00   4,000,000,000.00
Nonvoting common stock, shares authorized               200,000,000     200,000,000   200,000,000
Nonvoting common stock, par value               $ 0.01     $ 0.01   $ 0.01
Shares remitted by employees to satisfy minimum statutory employee tax withholding                     1,830    
Remitted Shares, Total                     $ 0.5    
Amount of share-based awards cancelled to satisfy minimum statutory employee tax withholding requirements                     3,300,000    
Value of share-based awards cancelled to satisfy minimum statutory employee tax withholding requirements                     $ 969.0    
Dividends declared per common share           $ 1.25   $ 1.25   $ 1.25 $ 2.50 $ 2.50  
Dividends payable date declared       Jul. 12, 2021                  
Dividends payable date to be paid   Sep. 29, 2021                      
Date of dividends declared on preferred shares         Jul. 07, 2021                
Preferred stock, liquidation preference               $ 9,203.0     $ 9,203.0   $ 11,203.0
Redemption Value               $ 9,203.0     $ 9,203.0    
Subsequent Event [Member]                          
Equity [Line Items]                          
Dividends declared per common share       $ 2.00                  
Dividends payable date of record     Sep. 01, 2021                    
Series A Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared               $ 231.77   236.98 $ 471.35 471.36  
Depositary Shares Per Share               1,000     1,000    
Redemption Value               $ 750.0     $ 750.0    
Series A Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         $ 239.58                
Series C Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared               $ 247.22   252.78 $ 502.78 502.78  
Depositary Shares Per Share               1,000     1,000    
Redemption Value               $ 200.0     $ 200.0    
Series C Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         255.56                
Series D Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared               $ 247.22   252.78 $ 502.78 502.78  
Depositary Shares Per Share               1,000     1,000    
Redemption Value               $ 1,350.0     $ 1,350.0    
Series D Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         255.56                
Series J Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared               $ 343.75   343.75 $ 687.50 687.50  
Depositary Shares Per Share               1,000     1,000    
Redemption Value               $ 1,000.0     $ 1,000.0    
Earliest Redemption Date                     May 10, 2023    
Series J Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         343.75                
Series K Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared               $ 398.44   398.44 $ 796.88 796.88  
Depositary Shares Per Share               1,000     1,000    
Redemption Value               $ 700.0     $ 700.0    
Earliest Redemption Date                     May 10, 2024    
Series K Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         398.44                
Series L Preferred Stock [Member]                          
Equity [Line Items]                          
Number of shares redeemed                         14,000
Dividend rate                         5.70%
Amount of redeemed                         $ 350.0
Preferred Stock, Redemption Price Per Share                         $ 25,000
Difference between the redemption value of Preferred Stock and the net carrying value at the time of redemption                         $ 1.0
Preferred stock dividends declared                       361.54  
Series M Preferred Stock [Member]                          
Equity [Line Items]                          
Dividend rate                 5.375%        
Amount of redeemed                 $ 2,000.0        
Preferred Stock, Redemption Price Per Share                 $ 25,000        
Difference between the redemption value of Preferred Stock and the net carrying value at the time of redemption                 $ 21.0        
Preferred stock dividends declared                   671.88   671.88  
Series N Preferred Stock [Member]                          
Equity [Line Items]                          
Dividend rate               6.30%          
Difference between the redemption value of Preferred Stock and the net carrying value at the time of redemption               $ 20.0          
Preferred stock dividends declared               $ 393.75   393.75 $ 787.50 787.50  
Preferred stock, liquidation preference               $ 25,000.0     $ 25,000.0    
Redemption Value               $ 675.0     $ 675.0    
Series E Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared               $ 1,022.22   1,011.11 $ 2,022.22 2,022.22  
Redemption Value               $ 767.0     $ 767.0    
Series E Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         1,022.22                
Series F Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared               $ 1,022.22   $ 1,011.11 $ 2,022.22 2,022.22  
Redemption Value               $ 161.0     $ 161.0    
Series F Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         1,022.22                
Series Q Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared                     $ 687.50 $ 889.93  
Depositary Shares Per Share               25     25    
Redemption Value               $ 500.0     $ 500.0    
Earliest Redemption Date                     Aug. 10, 2024    
Series Q Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         687.50                
Series R Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared                     $ 618.75    
Depositary Shares Per Share               25     25    
Redemption Value               $ 600.0     $ 600.0    
Earliest Redemption Date                     Feb. 10, 2025    
Series R Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         618.75                
Series S Preferred Stock [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared                     $ 550.00    
Depositary Shares Per Share               25     25    
Redemption Value               $ 350.0     $ 350.0    
Earliest Redemption Date                     Feb. 10, 2025    
Series S Preferred Stock [Member] | Subsequent Event [Member] | Group Inc. [Member]                          
Equity [Line Items]                          
Preferred stock dividends declared         $ 550.00                
Series U Preferred Stock [Member]                          
Equity [Line Items]                          
Dividend rate 2.915%           3.65%            
Preferred stock shares issued             30,000            
Preferred stock, liquidation preference             $ 25,000.0            
Depositary Shares Per Share             25            
Earliest Redemption Date             Aug. 10, 2026            
Non cumulative preferred stock fixed rate percentage             3.65%