Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 1,151		$ 1,088
Other comprehensive income/(loss):
Defined benefit plans	12		20
Foreign currency translation	(20)		(4)
Total other comprehensive income/(loss)	(8)	[1]	16	[1]
Comprehensive income	$ 1,143		$ 1,104

[1] Net of deferred taxes of $(3) million and $5 million during the three months ended March 31, 2015, and 2014, respectively.