RESTRUCTURING INITIATIVES - TRANSFORMATION PLAN (Liability Balances) (Details) - Transformation Plan $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Restructuring Reserve [Roll Forward]
Balance at December 31, 2018	$ 38.0
2019 charges	0.0
Adjustments	(0.9)
Cash payments	(13.3)
Non-cash write-offs	0.0
Foreign exchange	0.1
Balance at March 31, 2019	23.9
Employee-Related Costs
Restructuring Reserve [Roll Forward]
Balance at December 31, 2018	34.4
2019 charges	0.0
Adjustments	(1.1)
Cash payments	(10.8)
Non-cash write-offs	0.0
Foreign exchange	0.1
Balance at March 31, 2019	22.6
Contract termination and other net benefits
Restructuring Reserve [Roll Forward]
Balance at December 31, 2018	3.6
2019 charges	0.0
Adjustments	0.2
Cash payments	(2.5)
Non-cash write-offs	0.0
Foreign exchange	0.0
Balance at March 31, 2019	$ 1.3