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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Income Taxes [Line Items]    
Deferred tax assets, release of valuation allowance   $ 19,900,000
Increase in valuation allowance (19,400,000)  
Gross unrecognized tax benefits, excluding interest 137,000,000 121,800,000
Unrecognized tax benefit that would impact effective tax rate 66,100,000  
Interest accrued on unrecognized tax benefits 8,300,000 3,600,000
Income tax penalty accrued 0  
Unremitted foreign earnings 61,900,000  
Net Operating Losses Carryforwards [Member]
    
Income Taxes [Line Items]    
Amount with unlimited carry forward periods 62,000,000  
Tax Credit Carryforward [Member]
    
Income Taxes [Line Items]    
Amount with unlimited carry forward periods 6,600,000  
Federal net operating loss expected to be expired unutilized 4,500,000  
State net operating loss expected to be expired unutilized 203,300,000  
Foreign net operating loss expected to be expired unutilized 63,100,000  
Minimum [Member]
    
Income Taxes [Line Items]    
Amount of unrecognized tax benefits that are reasonably possible of being reduced in the next twelve months 6,000,000  
Maximum [Member]
    
Income Taxes [Line Items]    
Amount of unrecognized tax benefits that are reasonably possible of being reduced in the next twelve months 8,000,000  
Domestic Tax Authority [Member]
    
Income Taxes [Line Items]    
Federal net operating losses 20,700,000  
Federal credit carry forwards 3,700,000  
State and Local Jurisdiction [Member]
    
Income Taxes [Line Items]    
Federal net operating losses 94,700,000  
Federal credit carry forwards 11,000,000  
Foreign Tax Authority [Member]
    
Income Taxes [Line Items]    
Federal net operating losses 63,800,000  
Federal credit carry forwards $ 1,800,000