Benefit Obligations (Tables)

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Costs Recognized

The components of net periodic benefit cost are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	Pension Benefits	Post-retirement Benefits	Pension Benefits	Post-retirement Benefits	Pension Benefits	Post-retirement Benefits	Pension Benefits	Post-retirement Benefits
	(In $ millions)
Service cost	3	—	2	1	10	1	8	1
Interest cost	13	1	22	—	40	1	64	1
Expected return on plan assets	(51)	—	(50)	—	(154)	—	(149)	—
Special termination benefit	—	—	—	—	—	—	1	—
Total	(35)	1	(26)	1	(104)	2	(76)	2

Schedule of Company Commitments to Fund Benefit Obligations

Benefit obligation funding is as follows:

	As of September 30, 2021	Total Expected 2021
	(In $ millions)
Cash contributions to defined benefit pension plans	17	23
Benefit payments to nonqualified pension plans	16	20
Benefit payments to other postretirement benefit plans	3	4
Cash contributions to German multiemployer defined benefit pension plans(1)	6	9

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