v3.22.0.1
Unsecured Borrowings - Unsecured Long-Term Borrowings by Maturity Date (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Total $ 254,092 $ 213,481
Unsecured Debt [Member]    
Debt Instrument [Line Items]    
2023 43,211  
2024 33,736  
2025 28,803  
2026 22,157  
2027 - thereafter 126,185  
Total 254,092  
Group Inc. [Member]    
Debt Instrument [Line Items]    
Total 208,796 171,922
Group Inc. [Member] | Unsecured Debt [Member]    
Debt Instrument [Line Items]    
2023 33,921  
2024 27,003  
2025 23,158  
2026 18,571  
2027 - thereafter 106,143  
Total 208,796  
Subsidiaries [Member]    
Debt Instrument [Line Items]    
Total 45,296 $ 41,559
Subsidiaries [Member] | Unsecured Debt [Member]    
Debt Instrument [Line Items]    
2023 9,290  
2024 6,733  
2025 5,645  
2026 3,586  
2027 - thereafter 20,042  
Total $ 45,296