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Equity-Based Compensation - Information about Restricted Stock Unit Transactions (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Sep. 27, 2014
Units  
Unvested at beginning of year 21
Granted 5 [1]
Vested (9)
Forfeited (1)
Unvested at end of year 16 [2]
Weighted Average Grant-Date Fair Value  
Unvested at beginning of year $ 42.28
Granted $ 72.63 [1]
Vested $ 39.23
Forfeited $ 47.60
Unvested at end of year $ 53.17 [2]
[1] RSU grants include 0.3 million shares of Performance RSUs.
[2] 1.2 million of the unvested RSUs are Performance RSUs.