COMMISSIONS AND FEES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Commissions and fees
Total commissions and fees	$ 3,095	$ 3,258	$ 9,918	$ 9,377
Transaction Services
Commissions and fees
Total commissions and fees	462	426	1,381	1,313
Credit cards and bank cards
Commissions and fees
Total commissions and fees	609	705	1,865	2,051
Investment banking
Commissions and fees
Total commissions and fees	712	822	2,481	2,128
Trading-related
Commissions and fees
Total commissions and fees	603	535	1,962	1,695
Other Consumer
Commissions and fees
Total commissions and fees	208	241	666	680
Checking-related
Commissions and fees
Total commissions and fees	132	150	410	464
Loan servicing
Commissions and fees
Total commissions and fees	136	108	388	209
Corporate finance
Commissions and fees
Total commissions and fees	124	136	415	379
Other
Commissions and fees
Total commissions and fees	$ 109	$ 135	$ 350	$ 458