Leases (Tables)

12 Months Ended

Dec. 31, 2011

Leases [Abstract]

Schedule of Rent Expense

Rent expense recorded under all operating leases is as follows:

	Year Ended December 31,
	2011	2010	2009
	(In $ millions)
Total	173	160	148

Schedule of Future Minimum Lease Payments for Capital Leases

	As of December 31, 2011
	Capital Leases
	(In $ millions)
2012	44
2013	43
2014	43
2015	43
2016	43
Later years	311
Sublease income	—
Minimum lease commitments	527
Less amounts representing interest	279
Present value of net minimum lease obligations	248

Schedule of Future Minimum Rental Payments for Operating Leases

	As of December 31, 2011
	Operating Leases
	(In $ millions)
2012	58
2013	51
2014	44
2015	40
2016	36
Later years	106
Sublease income	(21	)
Minimum lease commitments	314