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Benefit Obligations
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Benefit Obligations Benefit Obligations
The components of net periodic benefit cost are as follows:
Three Months Ended March 31,
20242023
Pension
Benefits		Post-retirement
Benefits		Pension
Benefits		Post-retirement
Benefits
(In $ millions)
Service cost3 — 4 — 
Interest cost31 1 32 — 
Expected return on plan assets
(34)— (33)— 
Total— 1 3 — 
Benefit obligation funding is as follows:
As of
March 31,
2024
Total
Expected
2024
(In $ millions)
Cash contributions to defined benefit pension plans7 29 
Benefit payments to nonqualified pension plans5 19 
Benefit payments to other postretirement benefit plans1 3 
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 March 31, 2024As of December 31, 2023
Pension
Benefits		Post-retirement
Benefits		Pension
Benefits		Post-retirement
Benefits
(In $ millions)
Noncurrent Other assets169 — 166 — 
Current Other liabilities(22)(3)(22)(3)
Benefit obligations(402)(37)(415)(37)
Net amount recognized(255)(40)(271)(40)