Details of Certain Consolidated Statements of Income Lines (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Component of Other Income, Nonoperating [Line Items]
Total other revenues	$ 567	$ 651	$ 1,104	$ 1,204
Global Network Services Partner Revenues [Member]
Component of Other Income, Nonoperating [Line Items]
Total other revenues	151	166	295	317
Travelers Cheques Related Revenue [Member]
Component of Other Income, Nonoperating [Line Items]
Total other revenues	62	104	77	160
Net Gain (Loss) on Investment Securities [Member]
Component of Other Income, Nonoperating [Line Items]
Total other revenues	29	25	65	51
Other Revenues [Member]
Component of Other Income, Nonoperating [Line Items]
Total other revenues	$ 325	$ 356	$ 667	$ 676