DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Credit Concentrations in Industry Sectors) (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Net Total	[1]	$ (173.7)	$ (57.9)
United States Financial Institutions And Investment Banking Entities [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Credit concentrations	[2],[3]	(128.1)	(30.9)
Non-United States financial institutions [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Credit concentrations		(50.6)	(51.0)
Other [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Credit concentrations		$ 5.0	$ 24.0

[1] As determined by nationally-recognized statistical ratings organizations.

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

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