DERIVATIVE FINANCIAL INSTRUMENTS - Balance Sheet Table (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Derivatives designated as hedges
Derivative [Line Items]
Net derivative asset (liability)	$ (5.2)	$ (5.4)
Derivatives designated as hedges | Other current assets | Foreign exchange contracts
Derivative [Line Items]
Derivative assets	3.4	2.9
Derivatives designated as hedges | Other current assets | Cross currency swaps
Derivative [Line Items]
Derivative assets	0.9	0.8
Derivatives designated as hedges | Other assets | Cross currency swaps
Derivative [Line Items]
Derivative assets	0.3	0.0
Derivatives designated as hedges | Other assets | Debt conversion feature
Derivative [Line Items]
Derivative assets	0.0	0.0
Derivatives designated as hedges | Other current liabilities | Foreign exchange contracts
Derivative [Line Items]
Derivatives liabilities	(8.6)	(5.0)
Derivatives designated as hedges | Other current liabilities | Commodity swaps
Derivative [Line Items]
Derivatives liabilities	(1.2)	(1.1)
Derivatives designated as hedges | Other non-current liabilities | Cross currency swaps
Derivative [Line Items]
Derivatives liabilities	0.0	(3.0)
Derivatives not designated as hedges
Derivative [Line Items]
Net derivative asset (liability)	(0.3)	0.7
Derivatives not designated as hedges | Other current assets | Foreign exchange contracts
Derivative [Line Items]
Derivative assets	0.0	0.2
Derivatives not designated as hedges | Other current assets | Cross currency swaps
Derivative [Line Items]
Derivative assets	0.0	0.0
Derivatives not designated as hedges | Other assets | Cross currency swaps
Derivative [Line Items]
Derivative assets	0.0	0.0
Derivatives not designated as hedges | Other assets | Debt conversion feature
Derivative [Line Items]
Derivative assets	0.2	0.5
Derivatives not designated as hedges | Other current liabilities | Foreign exchange contracts
Derivative [Line Items]
Derivatives liabilities	(0.5)	0.0
Derivatives not designated as hedges | Other current liabilities | Commodity swaps
Derivative [Line Items]
Derivatives liabilities	0.0	0.0
Derivatives not designated as hedges | Other non-current liabilities | Cross currency swaps
Derivative [Line Items]
Derivatives liabilities	$ 0.0	$ 0.0