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Fair Value Measurements and Financial Instruments - Notional Amounts of Outstanding Derivative Instruments (Detail) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Interest rate swaps    
Derivative [Line Items]    
Notional amount $ 26,071 $ 26,071
Cross currency swaps    
Derivative [Line Items]    
Notional amount 33,526 34,976
Foreign exchange forwards    
Derivative [Line Items]    
Notional amount $ 995 $ 920