INDEBTEDNESS - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Long-term debt
Total long-term debt	$ 287.0	$ 313.2
Less: Current maturities of long-term debt	14.5	14.6
Less: Unamortized debt issuance costs	3.2	3.4
Long-term debt, net	269.3	295.2
Revolving credit facility | Revolving Credit Facility
Long-term debt
Total long-term debt	41.0	61.0
U.S. term loans
Long-term debt
Total long-term debt	193.3	196.2
Multi-currency term loans
Long-term debt
Total long-term debt	$ 52.7	$ 56.0