Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2013

Property Plant And Equipment [Abstract]

Summary of Property and Equipment

Property and equipment, net, consisted of:

	December 31, 2013							December 31, 2012
(in $ millions)	Cost		Accumulated depreciation			Net		Cost		Accumulated depreciation			Net
Capitalized software		650		(449	)		201		629		(386	)		243
Computer equipment		281		(139	)		142		274		(138	)		136
Building and leasehold improvements		17		(8	)		9		12		(7	)		5
Construction in progress		76		—			76		32		—			32
		1,024		(596	)		428		947		(531	)		416