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Employee Stock Purchase And Stock Option Plans (Fair Value Of Shares Vested) (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 02, 2015
Sep. 26, 2014
Sep. 27, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of shares vested $ 29,832 $ 25,495 $ 13,054
Service Condition | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of shares vested 18,568 6,820 13,054
Service, Market, And Performance Conditions | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of shares vested $ 11,264 $ 18,675 $ 0