Restructuring and Relocation Activities - Restructuring Activities (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Restructuring And Related Activities [Abstract]
Other associated costs		$ 3.9	$ 3.9
Restructuring charges	[1]	1.9	(0.2)
Total charges from continuing operations		5.8	3.7
Charges included in discontinued operations		(1.7)	2.4
Total charges		4.1	6.1
Capital expenditures		$ 9.9	$ 19.1

[1] Restructuring and other charges by segment were as follows: