DEBT - Schedule of Long-Term Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 2,815.3	$ 2,778.7
Less: current portion of total debt	101.9	104.3
Less: unamortized debt issuance costs	11.0	10.5
Long-term portion of total debt	2,702.4	2,663.9
Line of credit | $1.2 billion senior credit facility, due in 2022
Debt Instrument [Line Items]
Total debt	633.9	583.3
Term loan | $950 million term loan, due in 2022
Debt Instrument [Line Items]
Total debt	890.6	902.5
Private placement notes | $125 million private placement notes, due in 2019
Debt Instrument [Line Items]
Total debt	125.0	125.0
Private placement notes | $225 million private placement notes, due in 2020
Debt Instrument [Line Items]
Total debt	225.0	225.0
Private placement notes | $150 million private placement notes, due in 2021
Debt Instrument [Line Items]
Total debt	150.0	150.0
Private placement notes | $125 million private placement notes, due in 2022
Debt Instrument [Line Items]
Total debt	125.0	125.0
Private placement notes | $200 million private placement notes, due in 2022
Debt Instrument [Line Items]
Total debt	200.0	200.0
Private placement notes | $100 million private placement notes, due in 2023
Debt Instrument [Line Items]
Total debt	100.0	100.0
Private placement notes | $150 million private placement notes, due in 2023
Debt Instrument [Line Items]
Total debt	150.0	150.0
Promissory notes and deferred consideration | Notes weighted average maturity 2.6 and 2.7 years
Debt Instrument [Line Items]
Total debt	114.3	120.9
Foreign bank debt | Debt weighted average maturity 1.6 years and 1.9 years
Debt Instrument [Line Items]
Total debt	82.8	76.7
Obligations under capital leases
Debt Instrument [Line Items]
Total debt	$ 18.7	$ 20.3