COMMISSIONS AND FEES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Commissions and fees
Total commissions and fees	$ 2,759	$ 2,463
Investment banking
Commissions and fees
Total commissions and fees	862	574
Trading-related
Commissions and fees
Total commissions and fees	572	601
Trade and securities services
Commissions and fees
Total commissions and fees	390	406
Credit cards and bank cards
Commissions and fees
Total commissions and fees	311	271
Corporate finance
Commissions and fees
Total commissions and fees	169	123
Other consumer
Commissions and fees
Total commissions and fees	164	158
Checking-related
Commissions and fees
Total commissions and fees	120	116
Loan servicing
Commissions and fees
Total commissions and fees	86	96
Other
Commissions and fees
Total commissions and fees	$ 85	$ 118