Restructuring, Impairment and Other Charges - Schedule of Changes in the Restructuring Reserve (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			$ 62.7
Restructuring Charges	$ 23.4	$ 9.9	52.8	$ 43.8
Foreign Exchange and Other			0.0
Cash Paid			(47.0)
Balance at the end	68.5		68.5
Employee terminations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			13.0
Restructuring Charges			39.8
Foreign Exchange and Other			(1.3)
Cash Paid			(27.4)
Balance at the end	24.1		24.1
Multi-employer pension withdrawal obligations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			34.6
Restructuring Charges			1.4
Foreign Exchange and Other			1.4
Cash Paid			(3.8)
Balance at the end	33.6		33.6
Lease terminations and other
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			15.1
Restructuring Charges			11.6
Foreign Exchange and Other			(0.1)
Cash Paid			(15.8)
Balance at the end	$ 10.8		$ 10.8