Benefit Plans (Net Periodic Benefit Cost (Income)) (Details) - Pension [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Service cost	$ 2.2	$ 2.5	$ 3.0
Interest cost	14.5	14.6	15.8
Expected return on assets	(15.8)	(14.8)	(17.6)
Actuarial gain / (loss)	3.2	2.1	0.6
Prior service cost	1.0	1.0	1.0
Net Periodic benefit cost / (income) before adjustments	$ 5.1	$ 5.4	$ 2.8
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	5.66%	5.14%	5.41%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.05%	5.15%	5.40%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.21%	3.21%	3.21%