Pension and Postretirement Benefits (Amounts Recognized in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Total recognized in accumulated other comprehensive loss	$ (7.4)	$ (8.8)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	12.2	14.0
Prior service credit	(5.3)	(6.6)
Total recognized in accumulated other comprehensive loss	6.9	7.4
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(7.4)	(7.9)
Prior service credit	$ 0.0	$ (0.9)

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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