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Derivative Instruments and Hedging Activities - Summary of Sold Receivables Outstanding Balance Net of DPP Asset under Outstanding Securitization Program (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Derivative [Line Items]    
Sold receivables at the beginning of the year $ 690 $ 686
Proceeds from sale of receivables 4,606 4,852
Cash collections (remitted to the owner of the receivables) (4,607) (4,849)
Effect of currency exchange rate changes 45 1
Sold receivables at the end of the year $ 734 $ 690