Restructuring, Impairment and Other Charges - Schedule of Changes in the Restructuring Reserve (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			$ 63.7
Restructuring Charges	$ 13.5	$ 23.4	33.6	$ 52.8
Foreign Exchange and Other			0.2
Cash Paid			(41.1)
Balance at the end	56.4		56.4
Employee terminations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			20.2
Restructuring Charges			24.9
Foreign Exchange and Other			0.3
Cash Paid			(27.6)
Balance at the end	17.8		17.8
Multi-employer pension withdrawal obligations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			32.9
Restructuring Charges			1.6
Cash Paid			(3.6)
Balance at the end	30.9		30.9
Lease terminations and other
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			10.6
Restructuring Charges			7.1
Foreign Exchange and Other			(0.1)
Cash Paid			(9.9)
Balance at the end	$ 7.7		$ 7.7