RESTRUCTURING CHARGES (Details 2) - USD ($) $ in Millions	3 Months Ended		52 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	$ 8.5	$ 6.3	$ 8.5	$ 8.2	$ 5.1
Restructuring charges	4.0	4.0	186.0
Amounts utilized	(3.7)	(2.8)
Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	2.2	1.3	2.2	1.5	1.8
Restructuring charges	1.4	0.0	11.3
Amounts utilized	(0.7)	(0.5)
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	5.5	2.9	5.5	6.0	3.3
Restructuring charges	0.1	0.4	46.6
Amounts utilized	(0.6)	(0.8)
Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1.7
Facility exit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.8	2.1	0.8	$ 0.7	$ 0.0
Restructuring charges	2.5	3.6	42.2
Amounts utilized	$ (2.4)	$ (1.5)
Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 84.2