Leases - Schedule of Lease Assets and Liabilities Included on Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Operating Leases:
Operating lease right-of-use assets	$ 36.4	$ 38.1	$ 34.3
Current maturities of operating lease right-of-use liabilities	10.3	10.2	8.9
Operating lease right-of-use liabilities, less current maturities	26.2	27.9	25.5
Total operating lease liabilities	36.5	38.1	34.4
Finance Leases:
Gross property, plant and equipment	13.8	13.0	11.2
Accumulated depreciation	(7.7)	(7.4)	(6.6)
Property, plant and equipment, net	$ 6.1	$ 5.6	$ 4.6
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property Plant And Equipment Net	Property Plant And Equipment Net	Property Plant And Equipment Net
Current maturities of long-term lease liabilities	$ 1.5	$ 1.4	$ 1.4
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities	Other accrued liabilities
Long-term lease liabilities, less current maturities	$ 2.5	$ 2.2	$ 1.7
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other non-current liabilities	Other non-current liabilities	Other non-current liabilities
Total finance lease liabilities	$ 4.0	$ 3.6	$ 3.1