XML 116 R102.htm IDEA: XBRL DOCUMENT v2.4.0.6
Employee Benefit Plans (Summary Of Stock Option Activity) (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 31, 2010
Employee Stock Benefit Plans [Abstract]      
Beginning balance, Number Outstanding 621 732 1,004
Assumed from acquisitions, Number Outstanding 1    
Granted and assumed, Number Outstanding     15
Exercised, Number Outstanding (66) (80) (158)
Canceled/forfeited/expired, Number Outstanding (36) (31) (129)
Ending balance, Number Outstanding 520 621 732
Assumed from acquisitions, Weighted-Average Exercise Price per Share $ 2.08    
Weighted-Average Exercise Price per Share, Beginning Balance $ 21.79 $ 21.39 $ 24.29
Granted and assumed, Weighted-Average Exercise Price per Share     $ 13.23
Exercised, Weighted-Average Exercise Price per Share $ 13.51 $ 16.55 $ 17.88
Canceled/forfeited/expired, Weighted-Average Exercise Price per Share $ 23.40 $ 25.91 $ 47.31
Weighted-Average Exercise Price per Share, Ending Balance $ 22.68 $ 21.79 $ 21.39