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Derivative Financial Instruments - Gross Positions without Impact of Master Netting Agreements (Detail) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]    
Derivative assets $ 56 $ 224
Impact of master netting agreements, Assets   (6)
Derivative values with impact of master netting agreements (as carried on balance sheet), Assets $ 56 $ 218
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other assets Other assets
Cash collateral (held) pledged, Assets $ (62) $ (244)
Net position, Assets (6) (26)
Derivative liabilities (416) (260)
Impact of master netting agreements, Liabilities   6
Derivative values with impact of master netting agreements (as carried on balance sheet), Liabilities $ (416) $ (254)
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities Other liabilities
Cash collateral (held) pledged, Liabilities $ 69 $ 147
Net position, Liabilities $ (347) $ (107)