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Employee Retirement Plans (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs | The following table presents the components of net periodic pension and postretirement benefit expense (income) for employee retirement plans, which other than the service cost component is recorded in other expense, net in the consolidated statements of income (loss) (in millions):
| Pension benefits |  | Postretirement benefits
| Three months ended September 30, |  | Nine months ended September 30, |  | Three months ended September 30, |  | Nine months ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
Service cost | $ | 25 |  |  | $ | 25 |  |  | $ | 73 |  |  | $ | 73 |  |  | $ | 1 |  |  |  |  |  | $ | 2 |  |  | $ | 2 |
Interest cost | 48 |  |  | 46 |  |  | 143 |  |  | 138 |  |  | 4 |  |  | $ | 4 |  |  | 13 |  |  | 14 |
Expected return on plan assets | (51) |  |  | (48) |  |  | (150) |  |  | (144) |  |  |  |  |  |  |  |  |
Amortization of actuarial net gain |  |  |  |  |  |  |  |  | (8) |  |  | (6) |  |  | (23) |  |  | (18) |
Amortization of prior service cost (credit) | 1 |  |  | 1 |  |  | 3 |  |  | 4 |  |  | (2) |  |  | (1) |  |  | (5) |  |  | (5) |
Recognition of actuarial gain |  |  | (31) |  |  |  |  | (31) |  |  |  |  |  |  |  |  |
Special termination benefit charge |  |  | 3 |  |  | 1 |  |  | 6 |  |  |  |  |  |  |  |  |
Total pension and postretirement benefit expense (income) | $ | 23 |  |  | $ | (4) |  |  | $ | 70 |  |  | $ | 46 |  |  | $ | (5) |  |  | $ | (3) |  |  | $ | (13) |  |  | $ | (7) |

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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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