Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Condensed Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net income	$ 1,002		$ 785		$ 1,865		$ 1,424
Other comprehensive income/(loss), net of tax:
Defined benefit plans	0		0		(7)		1
Foreign currency translation	(15)		9		0		14
Other comprehensive income/(loss), net	(15)	[1]	9	[1]	(7)	[2]	15	[2]
Comprehensive income	$ 987		$ 794		$ 1,858		$ 1,439

[1] Net of deferred taxes of $(9) million and $5 million during the three months ended June 30, 2012 and 2011, respectively.

[2] Net of deferred taxes of $(1) million and $9 million during the six months ended June 30, 2012 and 2011, respectively.