Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 item	Jun. 30, 2011
Operating revenues by products and services
Other operating revenue	$ 4,612	$ 4,406	$ 9,222	$ 6,102
Surcharge amount on customers' bills			272	150
Number of groups of products and services			4
Strategic services
Operating revenues by products and services
Other operating revenue	2,076	1,726	4,132	2,265
Legacy services
Operating revenues by products and services
Other operating revenue	2,100	2,280	4,243	3,275
Data integration
Operating revenues by products and services
Other operating revenue	170	152	315	183
Other
Operating revenues by products and services
Other operating revenue	$ 266	$ 248	$ 532	$ 379