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Retirement Benefit Plans - Summary of Sensitivity of Defined Benefit Obligation to Changes in Weighted Average Assumptions (Details) | Dec. 31, 2024 | Dec. 31, 2023
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Discount rate |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |
1% Increase in Assumption | (10.00%) | (11.00%)
1% Decrease in Assumption | 11.00% | 12.00%
Rate of increase in future compensation |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |
1% Increase in Assumption | 0.00% | 1.00%
1% Decrease in Assumption | 0.00% | (1.00%)
Medical cost claim trend rate |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |
1% Increase in Assumption | 1.00% | 1.00%
1% Decrease in Assumption | (1.00%) | (1.00%)

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