Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets:
Loss carryforwards	$ 121.3	$ 128.6
Asbestos	0.0	116.7
Employee benefits	60.1	64.7
Accruals	32.0	36.8
Inventory	22.7	22.5
Credit carryforwards	6.2	3.4
Investment	1.7	0.5
Other	20.9	27.0
Gross deferred tax assets	264.9	400.2
Less: Valuation allowance	108.8	123.0	$ 129.8	$ 141.0
Net deferred tax assets	156.1	277.2
Deferred Tax Liabilities:
Intangibles	(38.0)	(40.9)
Undistributed earnings	(46.5)	(49.2)
Accelerated depreciation	(27.3)	(30.3)
Total deferred tax liabilities	(111.8)	(120.4)
Deferred income taxes	$ 44.3	$ 156.8