EMPLOYEE BENEFIT PLANS - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details) - Defined Benefit Pension Plans $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
United States
Defined Benefit Plan Disclosure [Line Items]
Net gain (loss) arising during the year	$ 0.7
Effect of exchange rates	0.0
Amortization, settlement, or curtailment recognition of net transition obligation	0.0
Amortization or curtailment recognition of prior service cost	0.0
Amortization or settlement recognition of net loss	0.8
Total recognized in other comprehensive gain	1.5
Total recognized in net periodic benefit cost and other comprehensive gain	0.6
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Net gain (loss) arising during the year	(20.3)
Effect of exchange rates	(2.1)
Amortization, settlement, or curtailment recognition of net transition obligation	0.4
Amortization or curtailment recognition of prior service cost	0.1
Amortization or settlement recognition of net loss	2.5
Total recognized in other comprehensive gain	(19.4)
Total recognized in net periodic benefit cost and other comprehensive gain	$ (19.9)