SEVERANCE, RESTRUCTURING, AND OTHER EXIT COSTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning balance	$ 25.8	$ 9.7	$ 3.2
Charges	13.0	37.1	22.4
Acquired Costs		13.8
Payments	(25.3)	(34.7)	(15.9)
Foreign Currency Translation Adjustments	0.4	(0.1)
Ending balance	13.9	25.8	9.7
Employee termination benefits
Restructuring Reserve [Roll Forward]
Beginning balance	7.4	5.5	0.0
Charges	6.2	19.2	16.6
Acquired Costs		6.0
Payments	(12.1)	(23.2)	(11.1)
Foreign Currency Translation Adjustments	1.2	(0.1)
Ending balance	2.7	7.4	5.5
Lease terminations
Restructuring Reserve [Roll Forward]
Beginning balance	9.3	2.4	0.9
Charges	5.0	2.6	3.5
Acquired Costs		7.8
Payments	(5.7)	(3.5)	(2.0)
Foreign Currency Translation Adjustments	(1.0)	0.0
Ending balance	7.6	9.3	2.4
Other contract terminations
Restructuring Reserve [Roll Forward]
Beginning balance	9.1	1.8	2.3
Charges	1.8	15.3	2.3
Acquired Costs		0.0
Payments	(7.5)	(8.0)	(2.8)
Foreign Currency Translation Adjustments	0.2	0.0
Ending balance	$ 3.6	$ 9.1	$ 1.8