COMMISSIONS AND FEES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Commissions and fees
Total commissions and fees	$ 3,532	$ 3,138
Transaction Services
Commissions and fees
Total commissions and fees	384	373
Credit cards and bank cards
Commissions and fees
Total commissions and fees	685	712
Investment banking
Commissions and fees
Total commissions and fees	925	654
Trading-related
Commissions and fees
Total commissions and fees	695	608
Other Consumer
Commissions and fees
Total commissions and fees	221	216
Checking-related
Commissions and fees
Total commissions and fees	206	238
Loan servicing
Commissions and fees
Total commissions and fees	137	40
Corporate finance
Commissions and fees
Total commissions and fees	159	134
Other
Commissions and fees
Total commissions and fees	$ 120	$ 163