Postretirement Benefits (Components of Net Periodic Benefit Cost) (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1.0	$ 1.1	$ 0.7
Expected return of plan assets	(1.3)	(1.4)	(1.3)
Amortization of net loss	0.5	0.5	0.4
Settlement	0.0	0.1	0.0
Net periodic benefit cost (credit)	$ 0.2	$ 0.3	$ (0.2)