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Investments - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Debt and Equity Securities, FV-NI [Line Items]      
Investments in credit funds measured at NAV $ 78,201 $ 83,427  
Gross unrealized gain included in accumulated other comprehensive gain/(loss) 0 118  
Gross unrealized loss included in accumulated other comprehensive gain/(loss) 3,520 779  
Net unrealized losses included in other comprehensive income/(loss) after tax (2,126) (955) $ 417
Held-to-maturity securities, gross unrealized gains 0 175  
Held-to-maturity securities, gross unrealized losses 1,440 0  
Available-for-sale Securities      
Debt and Equity Securities, FV-NI [Line Items]      
Net unrealized losses included in other comprehensive income/(loss before tax (2,850) (1,280)  
Net unrealized losses included in other comprehensive income/(loss) after tax (2,130) (955)  
Equity securities      
Debt and Equity Securities, FV-NI [Line Items]      
Equity method investment 5,350 5,810  
Fair value option      
Debt and Equity Securities, FV-NI [Line Items]      
Gains/(losses) recognized on equity securities (86) 2,120  
Investments in funds at NAV      
Debt and Equity Securities, FV-NI [Line Items]      
Investments in funds at NAV 1,300 1,800  
Investments in credit funds measured at NAV 1,640 $ 1,670  
Covered funds      
Debt and Equity Securities, FV-NI [Line Items]      
Investments in Volcker covered funds $ 200