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Goodwill and other Intangible Assets Schedule of Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 24, 2017
Sep. 25, 2016
Goodwill [Line Items]    
Goodwill, Gross $ 1,532,458 $ 1,532,458
Goodwill, Impaired, Accumulated Impairment Loss (1,288,729) (1,288,729)
Goodwill 246,426 243,729
Goodwill   $ 0
2017 Acquisition [Member]    
Goodwill [Line Items]    
Goodwill 2,697  
Goodwill $ 2,445