LONG-LIVED ASSETS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Depreciation	$ 83.7	$ 75.9	$ 63.7
Interest capitalized	0.5	1.5	5.7
Asset retirement obligation	7.3	6.5
Amortization of intangible assets	15.4	15.7	19.4
Additions to long lived assets not yet paid	$ 57.2	$ 51.9	$ 89.5