Retirement Benefit Plans (Assumptions Used in Accounting for Defined Benefit Plans) (Details) - Pension Plan	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rates for pension benefit obligation (percent)	4.87%
Weighted average discount rates for net periodic benefit cost (percent)	5.39%
Expected long-term rate of return on assets for net periodic benefit cost (percent)		5.00%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rates for pension benefit obligation (percent)		5.39%
Weighted average discount rates for net periodic benefit cost (percent)		5.02%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rates for pension benefit obligation (percent)		5.49%
Weighted average discount rates for net periodic benefit cost (percent)		5.04%