EMPLOYEE BENEFIT PLANS - Schedule of Net Periodic Pension Benefit Expense (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) participant	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Charge related to the effects of a partial settlement and remeasurement	$ 0.2
Pension Plan | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.8	$ 0.6	$ 0.4
Interest cost	0.7	0.7	0.8
Expected return on plan assets	(0.2)	(0.1)	(0.1)
Curtailment gains	0.0	0.0	(1.1)
Recognized net actuarial losses (gains)	4.4	(1.3)	(1.6)
Total net periodic pension/postretirement benefit expense (income)	$ 5.7	(0.1)	(1.6)
Number of participants (in participants) | participant	50
Service cost related to change in accounting for defined contirbution plans	$ 0.6
Pension Plan | United States Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	1.0	0.7
Interest cost	0.2	0.3	0.3
Expected return on plan assets	0.0	0.0	0.0
Curtailment gains	0.0	(0.1)	0.0
Recognized net actuarial losses (gains)	0.7	(0.3)	0.5
Total net periodic pension/postretirement benefit expense (income)	0.9	0.9	1.5
Service cost related to termination of former participant	$ 0.2
Pension Plan | NETHERLANDS
Defined Benefit Plan Disclosure [Line Items]
Number of participants (in participants) | participant	60
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.1	0.1	0.1
Interest cost	0.2	0.2	0.1
Expected return on plan assets	0.0	0.0	0.0
Curtailment gains	0.0	(0.2)	0.0
Recognized net actuarial losses (gains)	0.4	(0.4)	0.2
Total net periodic pension/postretirement benefit expense (income)	$ 0.7	$ (0.3)	$ 0.4