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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 01, 2016
May. 01, 2015
Apr. 01, 2016
May. 01, 2015
Income Taxes [Line Items]        
Income tax rate 16.60% 18.60% 11.00% 21.90%
Discrete tax benefits due to income tax return $ 0.3      
Discrete tax (expenses) benefits   $ 0.5 $ 2.2 $ 0.2
Change in unrecognized tax benefit within the next twelve months $ 1.1   1.1  
Due to the retroactive extension of the U.S. federal research and experimentation credits        
Income Taxes [Line Items]        
Discrete tax benefit due to a change in Tax Laws   1.5 1.3 1.5
Due to income tax return to provision adjustments        
Income Taxes [Line Items]        
Discrete tax expense (benefit) recognized   $ 2.0 0.4 $ 1.3
As a result of the enactment of tax laws reducing the U.K. statutory income tax rate        
Income Taxes [Line Items]        
Discrete tax benefit due to a change in Tax Laws     $ 1.3