RESTRUCTURING CHARGES (Details 2) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		55 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	$ 6.2		$ 8.1		$ 6.2	$ 8.1	$ 6.2	$ 8.2	$ 5.1
Restructuring charges	3.8	$ 4.0	6.4	$ 4.0	7.8	10.4	189.8
Amounts utilized					(9.8)	(7.4)
Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.0		0.9		0.0	0.9	0.0	1.5	1.8
Restructuring charges	0.4	1.4	0.1	0.0			11.7
Amounts utilized					(3.3)	(1.0)
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	5.3		6.1		5.3	6.1	5.3	6.0	3.3
Restructuring charges	0.2	0.1	3.7	0.4			46.8
Amounts utilized					(1.0)	(1.3)
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	0.9		1.1		0.9	1.1	0.9	$ 0.7	$ 0.0
Restructuring charges	$ 3.2	$ 2.5	$ 2.6	$ 3.6			45.4
Amounts utilized					$ (5.5)	$ (5.1)
Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges							$ 84.2