RESTRUCTURING AND OTHER COSTS - ADDITIONAL INFORMATION (Details) $ in Millions	3 Months Ended				12 Months Ended
	Mar. 31, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Nov. 30, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring costs					$ 33.5	$ 32.1	$ 55.4
Number of operating segments | segment					2
Asset impairment charges					$ 47.2
Fixed asset impairment					33.4	0.0	0.0
Impairment of intangible assets					9.1
Other costs of restructuring						188.9
Indefinite-lived intangible asset impairment	$ 5.3	$ 179.2	$ 266.9	$ 79.8	5.3	179.2	346.7
Litigation Settlement, Expense						9.7	23.1
Settlements of legal matters and impairment of long-term assets							369.8
Technologies & Equipment
Restructuring Cost and Reserve [Line Items]
Fixed asset impairment					$ 32.8
Indefinite-lived intangible asset impairment						$ 179.2	346.7
One time expenditures
Restructuring Cost and Reserve [Line Items]
Expected cost								$ 275.0
2017 Plans
Restructuring Cost and Reserve [Line Items]
Restructuring costs							29.0
Expected cost			$ 65.0				$ 65.0