Restructuring, Impairment and Other Charges - Schedule of Changes in the Restructuring Reserve (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	$ 21.0
Restructuring Charges	8.0	$ 6.4
Foreign Exchange and Other	1.1
Cash Paid	(5.1)
Balance at the end	25.0
Employee terminations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	7.6
Restructuring Charges	6.4
Foreign Exchange and Other	0.1
Cash Paid	(4.2)
Balance at the end	9.9
Multi-employer pension withdrawal obligations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	11.8
Restructuring Charges	0.2
Cash Paid	(0.4)
Balance at the end	11.6
Lease terminations and other
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	1.6
Restructuring Charges	1.4
Foreign Exchange and Other	1.0
Cash Paid	(0.5)
Balance at the end	$ 3.5