DERIVATIVE INSTRUMENTS - Fair Value and Notional Amounts of Derivatives With Counterparty Credit Risk (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	$ 23,356	$ 23,662
Asset Derivatives Fair Value	877	802
Liability Derivatives Fair Value	(384)	(2,423)
AA
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	2,277	1,098
Asset Derivatives Fair Value	175	39
Liability Derivatives Fair Value	(41)	(36)
A
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivatives	21,079	22,564
Asset Derivatives Fair Value	702	763
Liability Derivatives Fair Value	$ (343)	$ (2,387)