COMMISSIONS AND FEES (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fees and Commissions [Abstract]
Card fees amortization period				12 months
Commissions and fees
Total commissions and fees	[1]	$ 3,194	$ 3,441	$ 6,364	$ 6,625
Investment banking
Commissions and fees
Total commissions and fees		960	1,083	1,898	1,917
Trading-related
Commissions and fees
Total commissions and fees		616	645	1,250	1,346
Credit cards and bank cards
Commissions and fees
Total commissions and fees		497	565	998	1,128
Trade and securities services
Commissions and fees
Total commissions and fees		448	473	883	926
Other consumer
Commissions and fees
Total commissions and fees		182	229	362	442
Corporate finance
Commissions and fees
Total commissions and fees		126	153	271	276
Checking-related
Commissions and fees
Total commissions and fees		130	134	246	270
Loan servicing
Commissions and fees
Total commissions and fees		119	98	214	186
Other
Commissions and fees
Total commissions and fees		$ 116	$ 61	$ 242	$ 134

[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.