Restructuring, Impairment and Other Charges - Schedule of Changes in the Restructuring Reserve (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			$ 62.7
Restructuring Charges	$ 11.6	$ 15.9	29.4	$ 33.9
Foreign Exchange and Other			1.1
Cash Paid			(32.9)
Balance at the end	60.3		60.3
Employee terminations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			13.0
Restructuring Charges			21.0
Foreign Exchange and Other			(0.4)
Cash Paid			(19.4)
Balance at the end	14.2		14.2
Multi-employer pension withdrawal obligations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			34.6
Restructuring Charges			0.9
Foreign Exchange and Other			1.4
Cash Paid			(2.6)
Balance at the end	34.3		34.3
Lease terminations and other
Restructuring Cost And Reserve [Line Items]
Balance at the beginning			15.1
Restructuring Charges			7.5
Foreign Exchange and Other			0.1
Cash Paid			(10.9)
Balance at the end	$ 11.8		$ 11.8