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Other Long-Term Liabilities - Particulars of Other Long-Term Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Long-term portion of income taxes payable $ 199 $ 234
Deferred revenue 52 74
Asset retirement obligation 39 34
Long-term portion of fair value of hedges [note 21] 5 8
Other 37 21
Total $ 332 $ 371