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Benefit Obligations (Tables) | 9 Months Ended
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Sep. 30, 2025
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,
| 2025 |  | 2024 |  | 2025 |  | 2024
| 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 |  |  | — |  |  | 3 |  |  | 1 |  |  | 10 |  |  | — |  |  | 10 |  |  | 1 |
Interest cost | 30 |  |  | — |  |  | 31 |  |  | — |  |  | 90 |  |  | 1 |  |  | 94 |  |  | 1 |
Expected return on plan assets | (32) |  |  | — |  |  | (34) |  |  | — |  |  | (96) |  |  | — |  |  | (102) |  |  | — |
Total | 1 |  |  | — |  |  | — |  |  | 1 |  |  | 4 |  |  | 1 |  |  | 2 |  |  | 2 |
Schedule of Company Commitments to Fund Benefit Obligations | Benefit obligation funding is as follows:
| As of September 30, 2025 |  | Total Expected 2025 |
| (In $ millions) |
Cash contributions to defined benefit pension plans | 19 |  |  | 30 |  |
Benefit payments to nonqualified pension plans | 14 |  |  | 18 |  |
Benefit payments to other postretirement benefit plans | 5 |  |  | 3 |  |
Schedule of Defined Benefit Plans Disclosures | Pension and postretirement benefit plan balances recognized in the unaudited consolidated balance sheets consist of the following:
| As of September 30, 2025 |  | As of December 31, 2024
| Pension Benefits |  | Post-retirement Benefits |  | Pension Benefits |  | Post-retirement Benefits
| (In $ millions)
Noncurrent Other assets | 148 |  |  | — |  |  | 135 |  |  | — |
Current Other liabilities | (22) |  |  | (4) |  |  | (22) |  |  | (3) |
Benefit obligations | (365) |  |  | (33) |  |  | (358) |  |  | (31) |
Net amount recognized | (239) |  |  | (37) |  |  | (245) |  |  | (34) |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-4 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-2 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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