RESTRUCTURING AND OTHER COSTS - ADDITIONAL INFORMATION (Details) $ in Millions		3 Months Ended		6 Months Ended
	Apr. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($) unit	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring, incurred cost		$ 188.9	$ 81.7	$ 199.1	$ 84.8
Indefinite-lived intangible asset impairment	$ 179.2		$ 79.8	179.2	79.8
Number of reporting units with impairment | unit			2
Net restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring, incurred cost		3.4	$ 1.5	10.8	3.8
Other Restructuring Costs
Restructuring Cost and Reserve [Line Items]
Restructuring, incurred cost		$ 185.5	$ 80.2	$ 188.3	$ 81.0