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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Income Tax Disclosure [Abstract]    
Other Tax Expense (Benefit) $ 35.1 $ 7.7
Gross unrecognized tax benefit 15.2  
Unrecognized tax benefit that would affect effective tax rate $ 13.5