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Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Offsetting [Abstract]    
Reduction in estimated fair value of interest rate contracts in asset position $ 783 $ 1,100
Reduction in estimated fair value of interest rate contracts in liability position $ 32 $ 29