Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cumulative Translation Adjustment Summary [Roll Forward]
Beginning balance	$ 743	$ 600	$ 821
Net gain/(loss) on foreign currency translation	(86)	143	(161)
Reclassifications to net income	0	0	(60)
Ending balance	717	743	600
Total AOCI ending balance at December 31	717	743	600
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Net gain/(loss) on foreign currency translation, tax adjustment	0	0	0
Reclassifications to net income, tax adjustment	0	0	0
Out of Period Adjustment [Member]
Cumulative Translation Adjustment Summary [Roll Forward]
Net gain/(loss) on foreign currency translation	60	0	0
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Net gain/(loss) on foreign currency translation, tax adjustment	0	0	0
Accumulated Other Comprehensive Income (Loss) [Member]
Cumulative Translation Adjustment Summary [Roll Forward]
Other Comprehensive Income/(Loss) including Reclassification Adjustments, Net of Tax	$ (26)	$ 143	$ (221)