ACCUMULATED OTHER COMPREHENSIVE LOSS - Reclassification out of Accumulated Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		$ (243.2)
Ending Balance	$ (255.6)	(255.6)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent [Abstract]
Reclassifications into earnings - tax expense (benefit)	0.2	0.0
Change in fair - tax expense (benefit)	1.4	0.0
Deferred Gain (Loss) - Hedging
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		(2.2)
Ending Balance	(4.9)	(4.9)
Deferred Gain (Loss) - Hedging | Interest Rate Swap | Interest Expense | Reclassification out of Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Reclassifications into earnings, net of tax	0.7	0.9
Change in fair value, net of tax	$ (1.4)	$ (3.6)