EMPLOYEE BENEFIT PLANS - Components of Net Periodic Benefit Costs (Details) - Defined Benefit Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.3	$ 0.3	$ 0.3
Interest cost	1.5	1.3	1.4
Expected return on plan assets	(1.7)	(1.8)	(1.7)
Amortization of initial net obligation and prior service cost	0.0	0.0	0.0
Amortization of net loss	0.8	1.0	1.0
Settlement and curtailment losses recognized	0.0	0.0	0.0
Net periodic benefit cost	0.9	0.8	1.0
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.7	2.6	2.7
Interest cost	7.0	7.0	7.3
Expected return on plan assets	(11.8)	(13.5)	(12.4)
Amortization of initial net obligation and prior service cost	0.1	0.0	0.0
Amortization of net loss	2.5	2.1	2.8
Settlement and curtailment losses recognized	0.0	3.1	0.8
Net periodic benefit cost	$ 0.5	$ 1.3	$ 1.2