GOODWILL AND INTANGIBLE ASSETS - Amortization Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense on identifiable intangible assets	$ 17.8	$ 17.2	$ 44.6
Amortization expense from continuing operations			15.4
Expected amortization expenses in year one	17.0
Expected amortization expenses in year two	17.0
Expected amortization expenses in year three	17.0
Expected amortization expenses in year four	17.0
Expected amortization expenses in year five	17.0
Goodwill increase during period	(14.5)
Impairment loss	$ 0.0	$ 0.0	$ 0.0