Accounting Standards - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in other long-term assets	$ (201.8)	$ (194.3)	[1]
Decrease in other accrued liabilities	(353.1)	(329.9)	[1]
Decrease in other long-term liabilities	$ (79.0)	(79.2)	[1]
Accounting Standards Update 2015-03 | Other long-term assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs, amount reclassified		(1.8)
Accounting Standards Update 2015-03 | Long-term debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs, amount reclassified		1.8
Accounting Standards Update 2015-17 | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction of deferred income taxes, current		24.1
Decrease in other current assets		0.1
Increase in deferred income taxes, non current		12.9
Decrease in other long-term assets		0.1
Decrease in other accrued liabilities		9.4
Decrease in other long-term liabilities		$ 2.0

[1] Certain amounts have been reclassified to conform to current-year presentation. See note (k).