Accumulated Other Comprehensive Loss (Schedule of Reclassification of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense) benefit	$ (8.2)	$ (19.7)	$ (23.8)
Net income	26.1	56.6	$ 116.6
Reclassification out of accumulated other comprehensive income | Pension and Other Postretirement Benefits
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Settlement charges	0.0	(0.1)
Amortization of loss	(0.5)	(0.4)
Income tax (expense) benefit	0.2	0.1
Net income	$ (0.3)	$ (0.4)