Details of Certain Consolidated Statements of Income Lines (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Component of Other Income, Nonoperating [Line Items]
Other	$ 580	$ 475
Global Network Services Partner Revenues [Member]
Component of Other Income, Nonoperating [Line Items]
Other	151	146
Insurance Premium Revenue [Member]
Component of Other Income, Nonoperating [Line Items]
Other	85	62
Gain (Loss) on Investments [Member]
Component of Other Income, Nonoperating [Line Items]
Other	24	0
Other revenues [Member]
Component of Other Income, Nonoperating [Line Items]
Other	$ 320	$ 267