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Goodwill and Intangible Assets, Net - Summary Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk (Parenthetical) (Detail)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items]      
Discount rate applied to cash flow projections 7.80% 7.70%  
Growth rate used to extrapolate cash flow projections 2.50% 2.00%  
Weighted average Operating EBITDA multiple 11.5 11.5 11.1
Operating segments [member]      
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items]      
Weighted average Operating EBITDA multiple 11.5    
United States [member]      
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items]      
Discount rate applied to cash flow projections 7.30% 7.80% 8.50%
Growth rate used to extrapolate cash flow projections 2.00% 2.50%  
United States [member] | Operating segments [member]      
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items]      
Discount rate applied to cash flow projections 1.00%    
Growth rate used to extrapolate cash flow projections 1.00%