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Retirement Benefit Plans (Assumptions Used in Accounting for Defined Benefit Plans) (Details) - Pension Plan
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]    
Expected long-term rate of return on assets for net periodic benefit cost (percent) 5.00% 7.00%
Minimum    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average discount rates for pension benefit obligation (percent) 5.39% 5.02%
Weighted average discount rates for net periodic benefit cost (percent) 5.02% 5.36%
Maximum    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average discount rates for pension benefit obligation (percent) 5.49% 5.04%
Weighted average discount rates for net periodic benefit cost (percent) 5.04% 5.40%