Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Stockholders' Equity Note [Abstract]

Schedule of Share Repurchase Plan Authorization

The Company’s Board of Directors authorized the repurchase of the Company’s Common Stock as follows:

Date of Board Authorization	Authorization Amount
	(In $ millions)
February 2008	400
October 2008	100
April 2011	129
As of December 31, 2011	629

Schedule of Treasury Stock

The authorization gives management discretion in determining the timing and conditions under which shares may be repurchased. The share repurchase activity pursuant to this authorization is as follows:

	Year Ended December 31,						Total From February 2008 Through
	2011		2010		2009		December 31, 2011
Shares repurchased	652,016		1,667,592		—		12,082,808
Average purchase price per share	$	46.99	$	28.77	$	—	$	37.77
Amount spent on repurchased shares (in millions)	$	31	$	48	$	—	$	456

Schedule of Components of Other Comprehensive Income (Loss), Net

Other Comprehensive Income (Loss), Net

	Year Ended December 31,
	2011						2010						2009
	Gross Amount		Income Tax (Provision) Benefit		Net Amount		Gross Amount		Income Tax (Provision) Benefit		Net Amount		Gross Amount		Income Tax (Provision) Benefit		Net Amount
	(In $ millions)
Unrealized gain (loss) on marketable securities	—		—		—		—		(1	)	(1	)	(5	)	2		(3	)
Foreign currency translation	(29	)	2		(27	)	26		11		37		10		(5	)	5
Unrealized gain (loss) on interest rate swaps	37		(10	)	27		32		(15	)	17		23		(8	)	15
Pension and postretirement benefits	(290	)	110		(180	)	(102	)	39		(63	)	(150	)	53		(97	)
Total	(282	)	102		(180	)	(44	)	34		(10	)	(122	)	42		(80	)

Schedule of Adjustments to Accumulated Other Comprehensive Income (Loss), Net

Adjustments to Accumulated other comprehensive income (loss), net, are as follows:

	Unrealized Gain (Loss) on Marketable Securities		Foreign Currency Translation		Unrealized Gain (Loss) on Interest Rate Swaps		Pension and Postretire- ment Benefits		Accumulated Other Comprehensive Income (Loss), Net
	(In $ millions)
As of December 31, 2008	3		(43	)	(116	)	(424	)	(580	)
Current period change	(5	)	10		23		(150	)	(122	)
Income tax (provision) benefit	2		(5	)	(8	)	53		42
As of December 31, 2009	—		(38	)	(101	)	(521	)	(660	)
Current period change	—		26		32		(102	)	(44	)
Income tax (provision) benefit	(1	)	11		(15	)	39		34
As of December 31, 2010	(1	)	(1	)	(84	)	(584	)	(670	)
Current period change	—		(29	)	37		(290	)	(282	)
Income tax (provision) benefit	—		2		(10	)	110		102
As of December 31, 2011	(1	)	(28	)	(57	)	(764	)	(850	)