Details of Certain Consolidated Statements of Income Lines (Details 3) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Component of Operating Other Cost and Expense [Line Items]
Total other, net expense	$ 812	$ 630	$ 1,954	$ 1,584
Occupancy and equipment [Member]
Component of Operating Other Cost and Expense [Line Items]
Total other, net expense	433	371	1,218	1,134
Communications [Member]
Component of Operating Other Cost and Expense [Line Items]
Total other, net expense	93	92	280	284
Other Non-Income Taxes [Member]
Component of Operating Other Cost and Expense [Line Items]
Total other, net expense	53	77	164	172
Mastercard and Visa settlements [Member]
Component of Operating Other Cost and Expense [Line Items]
Total other, net expense	(68)	(213)	(494)	(639)
Other net expenses [Member]
Component of Operating Other Cost and Expense [Line Items]
Total other, net expense	$ 301	$ 303	$ 786	$ 633