Pension and Other Postretirement Benefits (Components of Net Periodic Benefit Costs) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Pension Benefits | ||
| Components of net periodic benefit cost: | ||
| Service cost | $ 62 | $ 55 |
| Interest cost | 39 | 37 |
| Expected return on plan assets | (39) | (37) |
| Amortization of prior service credit | (2) | (2) |
| Amortization of actuarial loss | 4 | 4 |
| Net periodic benefit cost | 64 | 57 |
| Other Benefits | ||
| Components of net periodic benefit cost: | ||
| Service cost | 5 | 5 |
| Interest cost | 8 | 9 |
| Amortization of prior service credit | (5) | (6) |
| Net periodic benefit cost | $ 8 | $ 8 |
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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 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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- References No definition available.
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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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