DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance				$ (339.3)
Net other comprehensive income (loss)		$ (9.0)	$ (41.7)	0.4	$ (119.3)
Ending Balance		(338.9)		(338.9)
Cash Flow Hedge [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance				(339.3)	(370.0)
Other comprehensive loss before reclassifications				(20.3)	(139.1)
Amounts reclassified from AOCI	[1]			20.7	19.8
Net other comprehensive income (loss)				0.4	(119.3)
Ending Balance		$ (338.9)	$ (489.3)	$ (338.9)	$ (489.3)

[1] For additional details on the amounts reclassified from AOCI, reference the Reclassifications from Accumulated Other Comprehensive Income table below.