Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 703.2	$ 664.6	$ 513.3	$ 507.5	$ 664.6	$ 507.5
Other comprehensive income (loss) before reclassifications, before income tax					(3.1)	0.4
Amounts reclassified from accumulated other comprehensive income (loss), before income tax					(2.3)	(2.9)
Tax effect	0.3				0.4	0.0
Other comprehensive income (loss), net of tax	(3.1)	(1.9)	(1.1)	(1.4)	(5.0)	(2.5)
Ending balance	768.9	703.2	570.0	513.3	768.9	570.0
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(5.1)		(5.4)	(5.1)	(5.4)
Other comprehensive income (loss) before reclassifications, before income tax					(3.1)	0.4
Amounts reclassified from accumulated other comprehensive income (loss), before income tax					0.0	0.0
Tax effect					0.0	0.0
Other comprehensive income (loss), net of tax					(3.1)	0.4
Ending balance	(8.2)		(5.0)		(8.2)	(5.0)
Pension and Postretirement Liability Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		25.8		45.8	25.8	45.8
Other comprehensive income (loss) before reclassifications, before income tax					0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss), before income tax					(2.3)	(2.9)
Tax effect					0.4	0.0
Other comprehensive income (loss), net of tax					(1.9)	(2.9)
Ending balance	23.9		42.9		23.9	42.9
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	18.8	20.7	39.0	40.4	20.7	40.4
Other comprehensive income (loss), net of tax	(3.1)	(1.9)	(1.1)	(1.4)
Ending balance	$ 15.7	$ 18.8	$ 37.9	$ 39.0	$ 15.7	$ 37.9