LONG-TERM DEBT - Schedule of Long-Term Debt (Parenthetical) (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2020
Line of credit | $1.2 billion senior credit facility, due in 2022
Debt Instrument [Line Items]
Maximum borrowing capacity of line of credit facility			$ 1,200,000,000
Term Loan | $1.3 billion Term Loan, due in 2022
Debt Instrument [Line Items]
Maximum borrowing capacity of line of credit facility			1,300,000,000
Senior Notes | $600 million Senior Notes, due 2024
Debt Instrument [Line Items]
Maximum borrowing capacity of line of credit facility			$ 600,000,000
Promissory notes and deferred consideration | Notes weighted average maturity 2.3 years and 2.5 years
Debt Instrument [Line Items]
Long-term debt, maturity	2 years 2 months 12 days	2 years 6 months
Foreign bank debt | Debt weighted average maturity 1.4 years and 1.6 years
Debt Instrument [Line Items]
Long-term debt, maturity	1 year 4 months 24 days	1 year 7 months 6 days