RESTRUCTURING CHARGES (Details 1) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		92 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	$ 8.1		$ 17.3		$ 8.1	$ 17.3	$ 8.1	$ 5.1	$ 12.7
Restructuring charges	6.4	$ 4.0	8.5	$ 8.2	10.4	16.7	197.6
Amounts utilized					(7.4)	(12.1)
Employee severance and related benefit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.9		0.8		0.9	0.8	0.9	1.8	3.4
Restructuring charges	0.1	0.0	0.0	0.0			23.0
Amounts utilized					(1.0)	(2.6)
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	6.1		16.4		6.1	16.4	6.1	3.3	7.5
Restructuring charges	3.7	0.4	5.8	5.7			45.0
Amounts utilized					(1.3)	(2.6)
Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.0		0.0		0.0	0.0	0.0	0.0	0.0
Restructuring charges	0.0	0.0	0.1	0.2			7.7
Amounts utilized					0.0	(0.3)
Facility exit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	1.1		0.1		1.1	0.1	1.1	$ 0.0	$ 1.8
Restructuring charges	$ 2.6	$ 3.6	$ 2.6	$ 2.3			36.2
Amounts utilized					$ (5.1)	$ (6.6)
Write-off of equipment and facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges							$ 81.6