EMPLOYEE BENEFIT PLANS - Employer Contributions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Direct benefit payments	$ 2.0
Foreign Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Direct benefit payments	6.4
Expected employer contributions	0.5
Expected benefit payments	2.4
United States Plan
Defined Benefit Plan Disclosure [Line Items]
Expected benefit payments	0.1
United States Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Expected benefit payments	0.0
Funded Plan | Foreign Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	0.5
Unfunded Plan | Foreign Plan | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 2.1