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Restricted Stock Units Activity and Related Information (Detail) - Restricted Stock Units
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended
Dec. 26, 2015
USD ($)
$ / shares
shares
Number of Restricted Stock Units  
Beginning Balance | shares 101,467
Restricted stock units granted | shares 41,082
Restricted stock units vested | shares (17,923)
Restricted stock units cancelled | shares (1,282)
Ending Balance | shares 123,344
Weighted-Average Grant Date Fair Value Per Share  
Beginning Balance | $ / shares $ 85.77
Restricted stock units granted | $ / shares 111.31
Restricted stock units vested | $ / shares 79.24
Restricted stock units cancelled | $ / shares 90.95
Ending Balance | $ / shares $ 95.09
Aggregate Intrinsic Value  
Aggregate intrinsic value of Restricted stock units | $ $ 13,325