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Derivatives and Hedging Activities - Derivatives with Credit-Related Contingent Features (Detail) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Derivative [Line Items]    
Net derivative liabilities under bilateral agreements $ 36,526 $ 34,315
Collateral posted 26,751 29,214
One-notch downgrade    
Derivative [Line Items]    
Additional collateral or termination payments: 352 345
Two-notch downgrade    
Derivative [Line Items]    
Additional collateral or termination payments: $ 1,283 $ 1,536