Accumulated Other Comprehensive Loss (Schedule of Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	$ 1,172.5	$ 1,118.9
Other comprehensive income (loss) before reclassifications	18.4	(40.2)
Amounts reclassified to earnings	0.4	0.2
Net other comprehensive income (loss) for period	18.8	(40.0)
Balance, end of period	1,259.0	1,172.5
AOCI, pension and other postretirement benefit plans, tax	1.8	1.9	$ 2.1
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(85.2)	(45.2)
Balance, end of period	(66.4)	(85.2)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(75.6)	(35.6)
Other comprehensive income (loss) before reclassifications	18.8	(40.0)
Amounts reclassified to earnings	0.0	0.0
Net other comprehensive income (loss) for period	18.8	(40.0)
Balance, end of period	(56.8)	(75.6)
Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(9.6)	(9.6)
Other comprehensive income (loss) before reclassifications	(0.4)	(0.2)
Amounts reclassified to earnings	0.4	0.2
Net other comprehensive income (loss) for period	0.0	0.0
Balance, end of period	$ (9.6)	$ (9.6)