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Retirement Benefit Obligations - Rates of Increase in the Cost of Covered Health Care Benefits (Details) - Other post-retirement benefits | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of defined benefit plans [line items] |  |
2023 |  | 6.00%
2024 | 7.50% | 5.50%
2025 | 7.50% | 5.30%
2026 | 7.30% | 4.80%
2027 | 7.00% | 4.50%
2028 | 6.80% | 4.50%
2029 | 6.30% | 4.50%
2030 | 6.00% | 4.50%
2031 | 5.80% | 4.50%
2032 | 5.50% | 4.50%
2033 | 5.30% | 4.50%
2034 | 5.00% | 4.50%
2035 | 4.80% | 4.50%
2036 and thereafter | 4.50% | 4.50%

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Eight + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Eleven + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Five + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Four + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Fourteen And Thereafter + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Nine + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year One + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Seven + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Six + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Ten + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Thirteen + References No definition available. + Details
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- Definition Actuarial Rate Of Expected Increase To Cost Of Covered Health Care Benefits, Year Twelve + References No definition available. + Details
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- Details
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