DERIVATIVES - Schedule of Derivative Instruments (Details) - USD ($) $ in Millions		Sep. 30, 2016	Dec. 31, 2015
Derivative Assets
Derivative assets		$ 1,192	$ 807
Less: Gross amounts offset in the Consolidated Balance Sheets	[1]	(89)	(178)
Less: Cash collateral applied	[1]	(1)	(4)
Total net derivative fair values presented in the Consolidated Balance Sheets	[2]	1,102	625
Derivative Liabilities
Derivative Liabilities		976	666
Less: Gross amounts offset in the Consolidated Balance Sheets	[1]	(89)	(178)
Less: Cash collateral applied	[1]	(47)	(3)
Total net derivative fair values presented in the Consolidated Balance Sheets	[2]	840	485
Derivatives not designated as hedging instruments:
Derivative Assets
Derivative assets		845	711
Derivative Liabilities
Derivative Liabilities		743	616
Interest rate swaps
Derivative Assets
Derivative assets		1,056	636
Derivative Liabilities
Derivative Liabilities		854	505
Interest rate swaps | Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	[3]	17,350	16,750
Derivative Assets
Derivative assets		347	96
Derivative Liabilities
Derivative Liabilities		233	50
Interest rate swaps | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	[3]	51,847	33,719
Derivative Assets
Derivative assets		709	540
Derivative Liabilities
Derivative Liabilities		621	455
Foreign exchange contracts
Derivative Assets
Derivative assets		118	163
Derivative Liabilities
Derivative Liabilities		113	156
Foreign exchange contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	[3]	8,296	8,366
Derivative Assets
Derivative assets		118	163
Derivative Liabilities
Derivative Liabilities		113	156
Other contracts
Derivative Assets
Derivative assets		18	8
Derivative Liabilities
Derivative Liabilities		9	5
Other contracts | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Notional amount	[3]	1,845	981
Derivative Assets
Derivative assets		18	8
Derivative Liabilities
Derivative Liabilities		$ 9	$ 5

[1] Amounts represent the impact of legally enforceable master netting agreements that allow the Company to settle positive and negative positions.

[2] The Company also offsets assets and liabilities associated with repurchase agreements on the Consolidated Balance Sheets. See Note 2 “Securities” for further information.

[3] The notional or contractual amount of interest rate derivatives and foreign exchange contracts is the amount upon which interest and other payments under the contract are based. Notional amounts are typically not exchanged. Therefore, notional amounts should not be taken as the measure of credit or market risk, as they do not measure the true economic risk of these contracts.