DEBT - Schedule of Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 14, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 2,744.1		$ 2,778.7
Less: current portion of total debt	111.9		104.3
Less: unamortized debt issuance costs	15.2	$ 7.1	10.5
Long-term portion of total debt	2,617.0		2,663.9
Line of credit | $1.2 billion Senior Credit Facility, due in 2022
Debt Instrument [Line Items]
Total debt	731.5		583.3
Term Loan | $1.3 billion Term Loan, due in 2022
Debt Instrument [Line Items]
Total debt	1,227.3		902.5
Senior Notes | $600 million Senior Notes, due 2024
Debt Instrument [Line Items]
Total debt	600.0
Private placement notes | $125 million private placement notes, due in 2019
Debt Instrument [Line Items]
Total debt			125.0
Private placement notes | $225 million private placement notes, due in 2020
Debt Instrument [Line Items]
Total debt			225.0
Private placement notes | $150 million private placement notes, due in 2021
Debt Instrument [Line Items]
Total debt			150.0
Private placement notes | $125 million private placement notes, due in 2022
Debt Instrument [Line Items]
Total debt			125.0
Private placement notes | $200 million private placement notes, due in 2022
Debt Instrument [Line Items]
Total debt			200.0
Private placement notes | $100 million private placement notes, due in 2023
Debt Instrument [Line Items]
Total debt			100.0
Private placement notes | $150 million private placement notes, due in 2023
Debt Instrument [Line Items]
Total debt			150.0
Promissory notes and deferred consideration | Notes weighted average maturity 2.5 and 2.7 years
Debt Instrument [Line Items]
Total debt	86.6		120.9
Foreign bank debt | Debt weighted average maturity 1.5 years and 1.9 years
Debt Instrument [Line Items]
Total debt	79.8		76.7
Obligations under finance leases
Debt Instrument [Line Items]
Total debt	$ 18.9		$ 20.3