Restructuring and Other Charges - Reconciliation of Restructuring Liability (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Beginning Balance		$ 7.9		$ 1.9
Provision		16.6		7.0		$ 2.8
Cash Expenditures	[1]	(11.9)		(3.9)
Non-Cash Write-offs		(1.7)	[2]	2.9	[3]
Ending Balance		10.9		7.9		1.9
Workforce Reduction Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		7.9		1.5
Provision		13.3		8.1
Cash Expenditures	[1]	(11.2)		(3.1)
Non-Cash Write-offs		0.4	[2]	1.4	[3]
Ending Balance		10.4		7.9		1.5
Asset Disposals [Member]
Restructuring Cost and Reserve [Line Items]
Provision		0.7
Non-Cash Write-offs	[2]	(0.7)
Contract Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance				0.4
Provision		0.2
Cash Expenditures	[1]			(0.4)
Non-Cash Write-offs	[2]	(0.2)
Ending Balance						$ 0.4
Other [Member]
Restructuring Cost and Reserve [Line Items]
Provision		2.4		(1.0)
Cash Expenditures	[1]	(0.7)		(0.4)
Non-Cash Write-offs		(1.2)	[2]	$ 1.5	[3]
Ending Balance		$ 0.5

[1] Cash expenditures primarily related to severance charges.

[2] Non-cash write-offs include long-lived asset impairment charges attributable to restructuring actions.

[3] Non-cash write-offs include long-lived asset impairment charges attributable to restructuring actions and the benefit from release of a foreign currency gain associated with the dissolution of a foreign entity