Derivatives - Schedule of Fair Value of Derivatives Designated and Not Designated as Hedges (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Not Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives Fair Value [Line Items]
Derivatives assets	$ 0.1	$ 1.8
Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives Fair Value [Line Items]
Derivatives liabilities	$ 1.9	1.5
Designated Fair Value Hedges | Other Noncurrent Assets
Derivatives Fair Value [Line Items]
Derivatives assets		$ 0.4