DEBT - Schedule of Debt Discount And Premium (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Original Issuance Discount And Premium [Roll Forward]
Beginning balance	$ (40.8)
New Original Issuance Discount	(5.6)
Fees paid to lenders	(3.4)
Amortization	1.8	$ 1.9
Ending balance	(48.0)
US Term Loan
Original Issuance Discount And Premium [Roll Forward]
Beginning balance	(34.2)
New Original Issuance Discount	0.0
Fees paid to lenders	0.0
Amortization	1.4
Ending balance	(32.8)
EMEA Term loan due 2025
Original Issuance Discount And Premium [Roll Forward]
Beginning balance	(18.7)
New Original Issuance Discount	(5.6)
Fees paid to lenders	(3.4)
Amortization	0.9
Ending balance	(26.8)
7.875% Senior Unsecured Notes
Original Issuance Discount And Premium [Roll Forward]
Beginning balance	12.1
New Original Issuance Discount	0.0
Fees paid to lenders	0.0
Amortization	(0.5)
Ending balance	$ 11.6