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Capital Management - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of financial assets [abstract]    
Term loan and revolving credit facility $ 1,200  
Ratio of net debt to adjusted EBITDA, long-term target description ratio of net debt to adjusted EBITDA of one times or lower.  
Ratio of net debt to adjusted EBITDA required for external borrowings description   net debt to adjusted EBITDA ratio of 3.5 or below
Currency used for measurement of ratio   United States dollar