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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Sep. 24, 2016
Sep. 26, 2015
Income Taxes [Line Items]    
Decrease in valuation allowance $ 14,700,000  
Federal net operating loss expected to be expired unutilized 4,500,000  
State net operating loss expected to be expired unutilized 151,300,000  
Foreign net operating loss expected to be expired unutilized 46,500,000  
Gross unrecognized tax benefits, excluding interest 163,600,000 $ 154,700,000
Unrecognized tax benefit that would impact effective tax rate 80,100,000 74,900,000
Interest accrued on unrecognized tax benefits 13,100,000 $ 9,900,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued 0  
Unremitted foreign earnings 187,600,000  
Net Operating Losses Carryforwards [Member]    
Income Taxes [Line Items]    
Amount with unlimited carry forward periods 44,600,000  
Tax Credit Carryforward [Member]    
Income Taxes [Line Items]    
Amount with unlimited carry forward periods 8,900,000  
Maximum [Member]    
Income Taxes [Line Items]    
Decrease in Unrecognized Tax Benefits is Reasonably Possible 1,000,000  
Domestic Tax Authority [Member]    
Income Taxes [Line Items]    
Net operating losses 13,900,000  
Credit carry forwards 300,000  
State and Local Jurisdiction [Member]    
Income Taxes [Line Items]    
Net operating losses 63,900,000  
Credit carry forwards 13,700,000  
Foreign Tax Authority [Member]    
Income Taxes [Line Items]    
Net operating losses 45,000,000  
Credit carry forwards $ 1,600,000