Annual report pursuant to Section 13 and 15(d)

The Company and Its Significant Accounting Policies Revenue Recognition (Details)

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The Company and Its Significant Accounting Policies Revenue Recognition (Details)
12 Months Ended
Sep. 24, 2017
Sep. 27, 2015
Sep. 28, 2014
Sales Revenue, Services, Net [Member]      
Revenue from External Customer [Line Items]      
Percentage of total (less than) 10.00% 10.00% 10.00%
Minimum [Member]      
Revenue from External Customer [Line Items]      
Estimated period of license benefit over which license fees are recognized 5 years    
Maximum [Member]      
Revenue from External Customer [Line Items]      
Estimated period of license benefit over which license fees are recognized 15 years