Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 1,479	$ 1,214	$ 1,795
Other comprehensive income/(loss), net of tax (Note 11)
Foreign currency translation	(86)	143	(221)
Total other comprehensive income/(loss), net of tax	(86)	143	(221)
Comprehensive income	$ 1,393	$ 1,357	$ 1,574