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Employee Stock Purchase And Stock Option Plans (Information Regarding Stock Option Plans) (Details) - $ / shares
 12 Months Ended
Oct. 02, 2015
Sep. 26, 2014
Sep. 27, 2013
At fiscal year end:      
Range of exercise prices for options outstanding, minimum (in dollars per share) $ 32.51 $ 25.87 $ 20.98
Range of exercise prices for options outstanding, maximum (in dollars per share) $ 80.63 $ 94.11 $ 94.11
Number of options exercisable (in shares) 2,590,560 2,725,980 3,034,111
For the fiscal year:      
Range of prices relating to options exercised, minimum (in dollars per share) $ 25.87 $ 20.98 $ 18.49
Range of prices relating to options exercised, maximum (in dollars per share) 42.74 57.54 56.95
Estimated weighted average fair values of options granted (in dollars per share) $ 13.41 $ 19.04 $ 20.64