BORROWED FUNDS - (Narrative) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Short-term borrowed funds	$ 11,899,000,000	$ 7,042,000,000
Federal Home Loan Bank Advances and Letters of Credit [Member] | Secured Debt
Debt Instrument [Line Items]
Short-term borrowed funds	11,000,000,000	4,200,000,000
Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Available borrowing capacity	3,500,000,000	8,200,000,000
Federal Reserve Bank Advances
Debt Instrument [Line Items]
Available borrowing capacity	$ 26,000,000,000