Other Fees and Commissions and Other Expenses (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Fees and Commissions and Other Expenses [Abstract]
Occupancy and equipment	$ 564	$ 517	$ 1,113	$ 1,025
Professional services	406	512	845	1,006
Other	260	371	561	968
Total Other expenses	$ 1,230	$ 1,400	$ 2,519	$ 2,999