Details of Certain Consolidated Statements of Income Lines (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Component of Other Income, Nonoperating [Line Items]
Other	$ 651	$ 537	$ 1,231	$ 1,012
Global Network Services Partner Revenues [Member]
Component of Other Income, Nonoperating [Line Items]
Other	166	156	317	302
Gain (Loss) on Investments [Member]
Component of Other Income, Nonoperating [Line Items]
Other	25	0	51	0
Other revenues [Member]
Component of Other Income, Nonoperating [Line Items]
Other	356	314	703	615
Travelers Cheques related revenues [Member]
Component of Other Income, Nonoperating [Line Items]
Other	$ 104	$ 67	$ 160	$ 95