Other Fees and Commissions and Other Expenses (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Fees and Commissions and Other Expenses [Abstract]
Occupancy and equipment	$ 2,334	$ 2,168	$ 2,033
Professional services	1,789	2,091	2,125
Other	1,202	1,597	1,506
Total Other, net	$ 5,325	$ 5,856	$ 5,664