VARIABLE INTEREST ENTITIES - Narrative (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)
Variable Interest Entity [Line Items]
Net impairment losses recognized in earnings	$ 0	$ 0
LIHTC Investments
Variable Interest Entity [Line Items]
Investment in Low Income Housing Tax Credit Partnerships	518,000,000	518,000,000
Qualified Affordable Housing Project Investments, Commitment	324,000,000	324,000,000
Amortization Method Qualified Affordable Housing Project Investments, Amortization	11,000,000	35,000,000
Affordable Housing Tax Credits and Other Tax Benefits, Amount	12,000,000	35,000,000
Other Tax Expense (Benefit)	$ (4,000,000)	$ (13,000,000)