Accumulated Other Comprehensive Loss (Schedule of Reclassification of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net	$ (0.7)	$ 1.1	$ 4.6
Income tax (expense) benefit	(19.7)	(23.8)	(18.2)
Net income	56.6	116.6	$ 108.1
Reclassification out of accumulated other comprehensive income | Amortization/settlement of pension and other postretirement benefits
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Pension settlement charges	(0.1)	0.0
Other income (expense), net	(0.4)	(0.4)
Income tax (expense) benefit	0.1	0.2
Net income	$ (0.4)	$ (0.2)