COMMISSIONS AND FEES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Commissions and fees
Card fees amortization period (in months)	12 months
Total commissions and fees	$ 2,463	$ 3,170
Trading-related
Commissions and fees
Total commissions and fees	601	634
Investment banking
Commissions and fees
Total commissions and fees	574	938
Trade and securities services
Commissions and fees
Total commissions and fees	406	435
Credit cards and bank cards
Commissions and fees
Total commissions and fees	271	501
Other consumer
Commissions and fees
Total commissions and fees	158	180
Corporate finance
Commissions and fees
Total commissions and fees	123	145
Checking-related
Commissions and fees
Total commissions and fees	116	116
Loan servicing
Commissions and fees
Total commissions and fees	96	95
Other
Commissions and fees
Total commissions and fees	$ 118	$ 126