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Netting Arrangements for Certain Financial Instruments and Securities Financing Activities - Information on Company's Accounting Netting Adjustments and Items Not Offset in Consolidated Balance Sheet Liabilities But Available for Offset in Event of Default (Parenthetical) (Detail) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Offsetting [Abstract]    
Cash collateral netted against derivative liabilities $ 3,000 $ 2,100
Derivative liabilities not subject to netting arrangements $ 123 $ 193