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Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Net Credit Derivative Positions (Detail) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Credit Derivatives [Line Items]    
Net position, Carrying/Fair Value $ (19) $ (55)
Notional 2,612 2,675
Sell-protection credit derivative positions    
Credit Derivatives [Line Items]    
Carrying / Fair Value 104 7
Notional 6,319 2,174
Buy-protection credit derivative positions    
Credit Derivatives [Line Items]    
Carrying / Fair Value (123) (62)
Notional $ 8,931 $ 4,849