RESTRUCTURING CHARGES (Details 1) - USD ($) $ in Millions	3 Months Ended		89 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	$ 6.3	$ 14.4	$ 6.3	$ 5.1	$ 12.7
Restructuring charges	4.0	8.2	191.2
Amounts utilized	(2.8)	(6.5)
Employee severance and job related benefits
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	1.3	2.9	1.3	1.8	3.4
Restructuring charges	0.0	0.0	22.9
Amounts utilized	(0.5)	(0.5)
Lease and other contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	2.9	11.5	2.9	3.3	7.5
Restructuring charges	0.4	5.7	41.3
Amounts utilized	(0.8)	(1.7)
Employee relocation costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	0.0	0.0	0.0	0.0	0.0
Restructuring charges	0.0	0.2	7.7
Amounts utilized	0.0	(0.2)
Facility exit costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring costs	2.1	0.0	2.1	$ 0.0	$ 1.8
Restructuring charges	3.6	2.3	33.6
Amounts utilized	$ (1.5)	$ (4.1)
Write-off of Equipment and Facility
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 81.6