COMMISSIONS AND FEES (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fees and Commissions [Abstract]
Card fees amortization period				12 months
Commissions and fees
Total commissions and fees	[1]	$ 2,732	$ 3,280	$ 9,096	$ 9,905
Investment banking
Commissions and fees
Total commissions and fees		692	931	2,590	2,848
Trading-related
Commissions and fees
Total commissions and fees		566	664	1,816	2,010
Credit cards and bank cards
Commissions and fees
Total commissions and fees		415	570	1,413	1,698
Trade and securities services
Commissions and fees
Total commissions and fees		428	469	1,311	1,396
Other consumer
Commissions and fees
Total commissions and fees		160	237	522	679
Corporate finance
Commissions and fees
Total commissions and fees		113	113	384	389
Checking-related
Commissions and fees
Total commissions and fees		128	138	374	408
Loan servicing
Commissions and fees
Total commissions and fees		103	93	317	279
Other
Commissions and fees
Total commissions and fees		$ 127	$ 65	$ 369	$ 198

[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.