Benefit Obligations (Tables)

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Periodic Benefit Costs Recognized

The components of net periodic benefit cost are as follows:

	Three Months Ended June 30,							Six Months Ended June 30,
	2016				2015			2016				2015
	Pension Benefits		Post-retirement Benefits		Pension Benefits		Post-retirement Benefits	Pension Benefits		Post-retirement Benefits		Pension Benefits		Post-retirement Benefits
	(In $ millions)
Service cost	2		—		3		1	4		—		6		1
Interest cost	28		—		36		—	56		1		71		1
Expected return on plan assets	(44	)	—		(53	)	—	(88	)	—		(105	)	—
Recognized actuarial (gain) loss	—		—		—		1	—		—		—		1
Amortization of prior service cost (credit), net	—		(1	)	—		—	—		(2	)	—		—
Special termination benefit	2		—		—		—	3		—		1		—
Total	(12	)	(1	)	(14	)	2	(25	)	(1	)	(27	)	3

Schedule of Company Commitments to Fund Benefit Obligations

Benefit obligation funding is as follows:

	As of June 30, 2016	Total Expected 2016
	(In $ millions)
Cash contributions to defined benefit pension plans	13	23
Benefit payments to nonqualified pension plans	11	22
Benefit payments to other postretirement benefit plans	2	4
Cash contributions to German multiemployer defined benefit pension plans(1)	4	8

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⁽¹⁾  The Company makes contributions based on specified percentages of employee contributions.