Benefit Obligations (Tables)

6 Months Ended

Jun. 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 June 30,				Six Months Ended June 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	1	3	—	7	1	6	—
Interest cost	14	—	21	—	27	—	42	1
Expected return on plan assets	(52)	—	(49)	—	(103)	—	(99)	—
Special termination benefit	—	—	1	—	—	—	1	—
Total	(35)	1	(24)	—	(69)	1	(50)	1

Schedule of Company Commitments to Fund Benefit Obligations

Benefit obligation funding is as follows:

	As of June 30, 2021	Total Expected 2021
	(In $ millions)
Cash contributions to defined benefit pension plans	11	23
Benefit payments to nonqualified pension plans	11	20
Benefit payments to other postretirement benefit plans	2	4
Cash contributions to German multiemployer defined benefit pension plans(1)	4	9

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