Commitments and Contingencies - Summary of Net Asbestos Charges (Detail) - Asbestos Related Matters [Member] - Continuing Operations [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Asbestos Related Contingencies [Line Items]
Asbestos provision	$ 63.0	$ 64.9	$ 63.3
Change in Defense Cost Estimate for Asbestos Matters	(100.7)	0.0	0.0
Asbestos remeasurement, net	(44.8)	(58.8)	0.5
Settlement Agreement	(8.9)	(2.2)	(31.0)
Net asbestos charge	$ (91.4)	$ 3.9	$ 32.8