Pension and Other Postretirement Benefits - Schedule of Net Periodic Benefit Cost Components (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Pension Benefits | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | $ 3 | $ 4 | $ 10 | $ 11 |
| Interest cost | 20 | 22 | 61 | 65 |
| Expected return on plan assets | (23) | (22) | (69) | (67) |
| Amortization of prior service credit | 0 | 0 | (1) | (2) |
| Amortization of actuarial loss | 4 | 6 | 12 | 17 |
| Net periodic benefit cost (credit) | 4 | 10 | 13 | 24 |
| Other Benefits | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 1 | 1 | 1 | 1 |
| Interest cost | 3 | 3 | 9 | 9 |
| Expected return on plan assets | (3) | (3) | (9) | (9) |
| Amortization of prior service credit | (6) | (8) | (19) | (24) |
| Net periodic benefit cost (credit) | $ (5) | $ (7) | $ (18) | $ (23) |
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Details
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- Details
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