LONG-TERM DEBT - Schedule of Long-Term Debt (Parenthetical) (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Line of credit | $1.2 billion Credit Facility, due in 2026 | Credit Agreement Amended Sept 2021
Debt Instrument [Line Items]
Maximum borrowing capacity of line of credit facility	$ 1,200,000,000
Line of credit | $200 million Term Loan, due in 2026 | Credit Agreement Amended Sept 2021
Debt Instrument [Line Items]
Maximum borrowing capacity of line of credit facility	200,000,000
Senior Notes | $500 million Senior Notes, due in 2029
Debt Instrument [Line Items]
Debt instrument, face amount	500,000,000
Senior Notes | $600 million Senior Notes, due in 2024
Debt Instrument [Line Items]
Maximum borrowing capacity of line of credit facility	$ 600,000,000
Promissory notes and deferred consideration | Promissory notes and deferred consideration
Debt Instrument [Line Items]
Long-term debt, maturity	1 year 8 months 12 days	2 years 1 month 6 days
Foreign bank debt | Foreign bank debt
Debt Instrument [Line Items]
Long-term debt, maturity	2 years 10 months 24 days	1 year 1 month 6 days