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Benefit Obligations
 9 Months Ended
Sep. 30, 2023
Retirement Benefits [Abstract]  
Benefit Obligations Benefit Obligations
The components of net periodic benefit cost are as follows:
Three Months Ended September 30, Nine Months Ended September 30,
2023202220232022
Pension
Benefits		Post-retirement
Benefits		Pension
Benefits		Post-retirement
Benefits		Pension
Benefits		Post-retirement
Benefits		Pension
Benefits		Post-retirement
Benefits
(In $ millions)
Service cost2 — 3 1 8 — 10 1 
Interest cost32 1 17 — 98 2 50 1 
Expected return on plan assets
(32)— (42)— (98)— (125)— 
Total2 1 (22)1 8 2 (65)2 
Benefit obligation funding is as follows:
As of
September 30,
2023
Total
Expected
2023
(In $ millions)
Cash contributions to defined benefit pension plans20 27 
Benefit payments to nonqualified pension plans15 18 
Benefit payments to other postretirement benefit plans2 4 
The Company's estimates of its U.S. defined benefit pension plan contributions reflect the provisions of the Pension Protection Act of 2006.
Pension and postretirement benefit plan balances recognized in the unaudited consolidated balance sheets consist of the following:
As of September 30, 2023As of December 31, 2022
Pension
Benefits		Post-retirement
Benefits		Pension
Benefits		Post-retirement
Benefits
(In $ millions)
Noncurrent Other assets167 — 160 — 
Current Other liabilities(21)(3)(21)(3)
Benefit obligations(357)(35)(372)(35)
Net amount recognized(211)(38)(233)(38)