Income Taxes - Schedule of Significant Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Components Of Deferred Tax Assets And Liabilities [Abstract]
Accrued liabilities and other reserves	$ 28.6	$ 26.2
Lease liabilities	14.4	15.4
Pension and other postretirement benefit plans liabilities	11.9	15.0
Net operating losses and other tax carryforwards	10.1	11.6
Share-based compensation	3.9	3.2
Allowance for doubtful accounts	3.4	2.5
Other	1.7	0.7
Total deferred tax assets	74.0	74.6
Valuation allowances	(4.8)	(7.5)
Total deferred tax assets	69.2	67.1
Accelerated depreciation	(14.6)	(11.3)
Right-of-use assets	(8.5)	(10.7)
Other intangible assets	(8.8)	(7.8)
Prepaid assets	(1.0)	(0.4)
Other	(4.6)	(2.9)
Total deferred tax liabilities	(37.5)	(33.1)
Net deferred tax assets	$ 31.7	$ 34.0