DEBT - Schedule of Long-Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Jun. 14, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 2,676.6		$ 2,778.7
Less: current portion of total debt	103.1		104.3
Less: unamortized debt issuance costs	14.2	$ 7.1	10.5
Long-term portion of total debt	2,559.3		2,663.9
Line of credit | $1.2 billion senior credit facility, due in 2022
Debt Instrument [Line Items]
Total debt	758.7		583.3
Term Loan | $1.3 billion Term Loan, due in 2022
Debt Instrument [Line Items]
Total debt	1,172.2		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 2.49 and 2.74 years
Debt Instrument [Line Items]
Total debt	73.1		120.9
Foreign bank debt | Debt weighted average maturity 1.6 years and 1.9 years
Debt Instrument [Line Items]
Total debt	42.2		76.7
Obligations under finance leases
Debt Instrument [Line Items]
Total debt	$ 30.4		$ 20.3