Property and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2014

Property Plant And Equipment [Abstract]

Summary of Property and Equipment, Net

Property and equipment, net, consisted of:

	June 30, 2014							December 31, 2013
(in $ millions)	Cost		Accumulated depreciation			Net		Cost		Accumulated depreciation			Net
Capitalized software	$	702	$	(498	)	$	204	$	650	$	(449	)	$	201
Computer equipment		288		(161	)		127		281		(139	)		142
Building and leasehold improvements		19		(9	)		10		17		(8	)		9
Construction in progress		72		—			72		76		—			76
	$	1,081	$	(668	)	$	413	$	1,024	$	(596	)	$	428