Restructuring, Impairment and Other Charges - Schedule of Changes in the Restructuring Reserve (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			$ 63.7
Restructuring Charges	$ 11.0	$ 11.6	20.1	$ 29.4
Foreign Exchange and Other			0.1
Cash Paid			(33.3)
Balance at the end	50.6		50.6
Employee terminations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			20.2
Restructuring Charges			13.7
Foreign Exchange and Other			0.2
Cash Paid			(23.4)
Balance at the end	10.7		10.7
Multi-employer pension withdrawal obligations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			32.9
Restructuring Charges			1.0
Cash Paid			(2.4)
Balance at the end	31.5		31.5
Lease terminations and other
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			10.6
Restructuring Charges			5.4
Foreign Exchange and Other			(0.1)
Cash Paid			(7.5)
Balance at the end	$ 8.4		$ 8.4