ACCUMULATED OTHER COMPREHENSIVE LOSS - Reclassification out of Accumulated Comprehensive Loss (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		$ (243.2)	$ (149.8)	$ (208.2)
Change in fair value, net of tax	[1]	(1.6)	(3.7)	1.5
Ending Balance		(245.3)	(243.2)	(149.8)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent [Abstract]
Reclassifications into earnings - tax expense (benefit)		1.0
Change in fair - tax expense (benefit)		(2.0)
Deferred Gain (Loss) - Hedging [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		(2.2)	1.5	0.0
Ending Balance		(3.8)	(2.2)	$ 1.5
Deferred Gain (Loss) - Hedging [Member] | Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		(2.2)
Ending Balance		(3.8)	$ (2.2)
Deferred Gain (Loss) - Hedging [Member] | Interest Rate Swap [Member] | Interest Expense [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Reclassifications into earnings, net of tax		1.6
Change in fair value, net of tax		$ (3.2)

[1] Net of tax (benefit) expense of $(1.0) million, $(2.3) million and $1.0 million for 2015, 2014 and 2013, respectively.