Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are as follows:

	Fair Value Measurement Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)		Total
	(In $ millions)
Marketable securities, at fair value
Mutual funds	64	—		64
Derivatives not designated as hedging instruments
Foreign currency forwards and swaps	—	9		9		(1)
Total assets as of December 31, 2011	64	9		73
Derivatives designated as cash flow hedging instruments
Interest rate swaps	—	(21	)	(21	)	(2)
Interest rate swaps	—	(13	)	(13	)	(3)
Derivatives not designated as hedging instruments
Interest rate swaps	—	(2	)	(2	)	(2)
Foreign currency forwards and swaps	—	(3	)	(3	)	(2)
Total liabilities as of December 31, 2011	—	(39	)	(39	)
Marketable securities, at fair value
US corporate debt securities	—	1		1
Mutual funds	77	—		77
Derivatives not designated as hedging instruments
Foreign currency forwards and swaps	—	3		3		(1)
Total assets as of December 31, 2010	77	4		81
Derivatives designated as cash flow hedging instruments
Interest rate swaps	—	(59	)	(59	)	(2)
Interest rate swaps	—	(14	)	(14	)	(3)
Derivatives not designated as hedging instruments
Foreign currency forwards and swaps	—	(10	)	(10	)	(2)
Total liabilities as of December 31, 2010	—	(83	)	(83	)

___________________________

⁽¹⁾  Included in current Other assets in the consolidated balance sheets.

⁽²⁾  Included in current Other liabilities in the consolidated balance sheets.

⁽³⁾  Included in noncurrent Other liabilities in the consolidated balance sheets.

Schedule of Carrying Values and Fair Values of Financial Instruments

Carrying values and fair values of financial instruments that are not carried at fair value in the consolidated balance sheets are as follows:

	As of December 31, 2011		As of December 31, 2010
	Carrying Amount	Fair Value	Carrying Amount	Fair Value
	(In $ millions)
Cost investments	147	—	139	—
Insurance contracts in nonqualified pension trusts	69	69	70	70
Long-term debt, including current installments of long-term debt	2,911	2,967	3,064	3,087