Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets:
Accruals	$ 88.0	$ 69.0
Asbestos	228.7	272.6
Employee benefits	110.4	109.4
Credit carryforwards	34.5	29.3
Loss carryforwards	125.1	128.0
Other	15.5	36.0
Gross deferred tax assets	602.2	644.3
Less: Valuation allowance	135.7	147.1	$ 135.3	$ 536.7
Net deferred tax assets	466.5	497.2
Deferred Tax Liabilities:
Undistributed earnings	(39.6)	(61.2)
Intangibles	(70.8)	(58.7)
Accelerated depreciation	(31.0)	(26.0)
Investment	(0.5)	(0.4)
Total deferred tax liabilities	(141.9)	(146.3)
Net deferred tax assets	$ 324.6	$ 350.9