VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Variable Interest Entity [Line Items]
Net impairment losses recognized in earnings	$ 2,000,000	$ 2,000,000	$ 3,000,000	$ 6,000,000
LIHTC Investments
Variable Interest Entity [Line Items]
Investment in Low Income Housing Tax Credit Partnerships	494,000,000		494,000,000
Qualified Affordable Housing Project Investments, Commitment	323,000,000		323,000,000
Amortization Method Qualified Affordable Housing Project Investments, Amortization	12,000,000		24,000,000
Affordable Housing Tax Credits and Other Tax Benefits, Amount	12,000,000		23,000,000
Other Tax Expense (Benefit)	(5,000,000)		(9,000,000)
Net impairment losses recognized in earnings	$ 0		$ 0