Pension and Postretirement Benefits (Components of Net Periodic (Benefit) Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.0	$ 1.9	$ 2.1
Interest cost	1.9	2.1	0.9
Expected return on plan assets	(3.0)	(3.2)	(2.8)
Amortization of prior service cost	(0.8)	(0.7)	(0.7)
Amortization of net loss (gain)	0.3	0.0	0.6
Recognized curtailment gain	0.0	(0.1)	0.0
Settlement gain	0.0	(0.3)	0.0
Other	(1.4)	0.0	0.0
Net periodic cost (benefit)	(1.0)	(0.3)	0.1
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.1	0.1
Interest cost	0.6	0.8	0.6
Expected return on plan assets	0.0	0.0	0.0
Amortization of prior service cost	(0.9)	(1.1)	(1.1)
Amortization of net loss (gain)	(0.9)	(0.7)	0.0
Recognized curtailment gain	0.0	0.0	0.0
Settlement gain	0.0	0.0	0.0
Other	0.0	0.0	0.0
Net periodic cost (benefit)	$ (1.1)	$ (0.9)	$ (0.4)