Retirement Benefits (Unaudited) (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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| Components of Net Periodic Benefit Cost | ||||
| Net periodic benefit cost (benefit) | $ (361) | $ (256) | ||
| Defined contribution plan, employer contributions | $ 145 | $ 133 | 532 | 517 |
| Pension Benefits | ||||
| Components of Net Periodic Benefit Cost | ||||
| Service cost | 53 | 55 | 159 | 163 |
| Interest cost | 398 | 404 | 1,196 | 1,209 |
| Expected return on plan assets | (565) | (540) | (1,695) | (1,619) |
| Amortization of prior service credit | 0 | 0 | 0 | 0 |
| Other | 0 | 0 | 0 | 7 |
| Net periodic benefit cost (benefit) | (114) | (81) | (340) | (240) |
| Defined benefit plan, contributions by Employer | 24 | 25 | 66 | 67 |
| OPB | ||||
| Components of Net Periodic Benefit Cost | ||||
| Service cost | 1 | 1 | 3 | 3 |
| Interest cost | 15 | 16 | 44 | 47 |
| Expected return on plan assets | (22) | (22) | (66) | (64) |
| Amortization of prior service credit | (1) | (1) | (2) | (2) |
| Other | 0 | 0 | 0 | 0 |
| Net periodic benefit cost (benefit) | (7) | (6) | (21) | (16) |
| Defined benefit plan, contributions by Employer | $ 5 | $ 7 | $ 26 | $ 27 |
| X | ||||||||||
- 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 contribution received by defined benefit plan from employer which increases plan assets. 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 defined benefit plan cost (credit), classified as other. 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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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available.
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- Details
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- Details
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