Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

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

	Fair Value Measurement										Balance Sheet Classification
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)				Total
	As of December 31,
	2018	2017	2018		2017		2018		2017
	(In $ millions)
Derivatives Designated as Cash Flow Hedges
Commodity swaps	—	—	1		2		1		2		Current Other assets
Commodity swaps	—	—	—		2		—		2		Noncurrent Other assets
Derivatives Not Designated as Hedges
Foreign currency forwards and swaps	—	—	8		5		8		5		Current Other assets
Total assets	—	—	9		9		9		9
Derivatives Designated as Cash Flow Hedges
Commodity swaps	—	—	(1	)	—		(1	)	—		Noncurrent Other liabilities
Interest rate swaps	—	—	(10	)	—		(10	)	—		Noncurrent Other liabilities
Derivatives Not Designated as Hedges
Foreign currency forwards and swaps	—	—	(7	)	(3	)	(7	)	(3	)	Current Other liabilities
Total liabilities	—	—	(18	)	(3	)	(18	)	(3	)

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 are as follows:

			Fair Value Measurement
	Carrying Amount		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total
	As of December 31,
	2018	2017	2018	2017	2018	2017	2018	2017
	(In $ millions)
Equity investments without readily determinable fair values	164	159	—	—	—	—	—	—
Insurance contracts in nonqualified trusts	37	42	37	42	—	—	37	42
Long-term debt, including current installments of long-term debt	3,355	3,398	3,204	3,299	168	208	3,372	3,507