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Restricted Stock Units Activity and Related Information (Detail) - Restricted Stock Units - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Sep. 26, 2015
Sep. 27, 2014
Sep. 28, 2013
Number of Restricted Stock Units      
Beginning Balance 103,822 93,284 105,037
Restricted stock units granted 45,587 59,269 39,415
Restricted stock units vested (41,684) (43,111) (42,291)
Restricted stock units cancelled (6,258) (5,620) (8,877)
Ending Balance 101,467 103,822 93,284
Weighted-Average Grant Date Fair Value Per Share      
Beginning Balance $ 70.98 $ 62.24 $ 49.27
Restricted stock units granted 105.51 74.54 78.23
Restricted stock units vested 71.32 57.29 45.96
Restricted stock units cancelled 80.34 68.47 57.31
Ending Balance $ 85.77 $ 70.98 $ 62.24
Aggregate Intrinsic Value      
Aggregate intrinsic value of Restricted stock units $ 11,639