DEBT - Schedule of Long-Term Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt	$ 2,658.7	$ 2,747.2
Less: current portion of total debt	112.1	119.5
Less: unamortized debt issuance costs	10.9	12.4
Long-term portion of total debt	2,535.7	2,615.3
Obligations under capital leases
Debt Instrument [Line Items]
Total debt	23.8	9.4
$1.2 billion senior credit facility weighted average rate 3.45% at 2018 and 2.55% at 2017, due in 2022
Debt Instrument [Line Items]
Total debt	410.1	471.7
$950 million term loan weighted average rate 3.45% at 2018 and 2.83% at 2017, due in 2022
Debt Instrument [Line Items]
Total debt	926.3	950.0
$125 million private placement notes 3.18% at 2018 and 2.68% at 2017, due in 2019
Debt Instrument [Line Items]
Total debt	125.0	125.0
$225 million private placement notes 4.97% at 2018 and 4.47% at 2017, due in 2020
Debt Instrument [Line Items]
Total debt	225.0	225.0
$150 million private placement notes 3.39% at 2018 and 2.89% at 2017, due in 2021
Debt Instrument [Line Items]
Total debt	150.0	150.0
$125 million private placement notes 3.76% at 2018 and 3.26% at 2017, due in 2022
Debt Instrument [Line Items]
Total debt	125.0	125.0
$200 million private placement notes 3.22% at 2018 and 2.72% at 2017, due in 2022
Debt Instrument [Line Items]
Total debt	200.0	200.0
$100 million private placement notes 3.29% at 2018 and 2.79% at 2017, due in 2023
Debt Instrument [Line Items]
Total debt	100.0	100.0
$150 million private placement notes 3.68% at 2018 and 3.18% at 2017, due in 2023
Debt Instrument [Line Items]
Total debt	150.0	150.0
Promissory notes and deferred consideration weighted average rate 1.69% at 2018 and 1.49% at 2017 and weighted average maturity 3.0 years at 2018 and 2.9 years at 2017
Debt Instrument [Line Items]
Total debt	146.2	155.9
Foreign bank debt weighted average rate 5.37% at 2018 and 6.11% at 2017 and weighted average maturity 2.5 years at 2018 and 1.7 years at 2017
Debt Instrument [Line Items]
Total debt	$ 77.3	$ 85.2