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Retirement Benefit Plans (Actual Allocation Percentage and Target Allocation Percentage for the U.S. Pension Plan Assets) (Details) - Pension Plan | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual allocation (percent) | 99.20% | 99.10%
Money market funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual allocation (percent) | 0.80% | 0.60%
Cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Actual allocation (percent) | 0.00% | 0.30%
Target allocation (percent) | 0.00% |
Minimum | Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (percent) | 90.00% |
Minimum | Money market funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (percent) | 0.00% |
Maximum | Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (percent) | 100.00% |
Maximum | Money market funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation (percent) | 10.00% |

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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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