Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt average term	8 years 10 months 24 days
Total debt average rate	5.00%
Senior Secured Term Loan Facilities [Member]
Debt Instrument [Line Items]
Effective interest rate	2.80%
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Effective interest rate	5.10%
Other Senior Secured Debt [Member]
Debt Instrument [Line Items]
Effective interest rate	4.70%
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Effective interest rate	5.50%