COMMISSIONS AND FEES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Commissions and fees
Card fees amortization period	12 months
Total commissions and fees	$ 3,170	[1]	$ 3,184	[1]
Investment banking
Commissions and fees
Total commissions and fees	938		834
Trading-related
Commissions and fees
Total commissions and fees	634		701
Credit cards and bank cards
Commissions and fees
Total commissions and fees	501		563
Trade and securities services
Commissions and fees
Total commissions and fees	435		453
Other consumer
Commissions and fees
Total commissions and fees	180		213
Corporate finance
Commissions and fees
Total commissions and fees	145		123
Checking-related
Commissions and fees
Total commissions and fees	116		136
Loan servicing
Commissions and fees
Total commissions and fees	95		88
Other
Commissions and fees
Total commissions and fees	$ 126		$ 73

[1] Certain prior-period revenue and expense lines and totals were reclassified to conform to the current period’s presentation. See Note 3 to the Consolidated Financial Statements.