DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Offsetting of Financial Liabilities and Derivative Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Derivatives
Gross Amount of Recognized Liabilities	$ (289.7)	$ (221.5)
Gross Amount Offset in the Statement of Financial Position	0.0	0.0
Net Amount of Liabilities Presented in the Statement of Financial Position	(289.7)	(221.5)
Gross Amount Not Offset in the Statement of Financial Position	23.2	41.5	[1]
Net Amount	$ (266.5)	$ (180.0)

[1] Includes $12.6 million of cash collateral at December 31, 2015.