FAIR VALUES MEASUREMENTS - Fair Value of Long-term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	$ 3,332.6	$ 3,291.6
Carrying Value | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	65.0	140.0
Carrying Value | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	575.0	575.0
Carrying Value | Other secured loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	2.1	4.3
Fair Value | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	2,424.5	2,832.3
Fair Value | Quoted Prices in Active Markets Level 1 | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	65.0	140.0
Fair Value | Senior Notes | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	370.9	435.6
Fair Value | Other secured loans | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	2.1	4.3
US Term Loan | Carrying Value | Term loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	1,739.0	1,743.5
US Term Loan | Fair Value | Term loan | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	1,208.6	1,464.5
EMEA Term loan due 2025 | Carrying Value | Term loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	951.5	828.8
EMEA Term loan due 2025 | Fair Value | Term loan | Quoted Prices in Active Markets Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt, including current portion	$ 777.9	$ 787.9