v2.4.0.6
Stock-Based Compensation (Summary Of Stock Option Activity Under All Plans) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Oct. 27, 2012
Y
Number of Shares  
Number of Shares, Options outstanding - July 28, 2012 14,103,000
Number of Shares, Granted 2,110,300
Number of Shares, Exercised (1,755,500)
Number of Shares, Cancelled/Forfeited (350,100)
Number of Shares, Options outstanding - October 27, 2012 14,107,700
Number of Shares, Options vested and expected to vest at October 27, 2012 13,839,300 [1]
Number of Shares, Options exercisable at October 27, 2012 7,181,500
Weighted-Average Exercise Price  
Weighted-Average Exercise Price, Options outstanding - July 28, 2012 $ 9.69
Weighted-Average Exercise Price, Granted $ 20.79
Weighted-Average Exercise Price, Exercised $ 8.16
Weighted-Average Exercise Price, Cancelled/Forfeited $ 11.67
Weighted-Average Exercise Price, Options outstanding - October 27, 2012 $ 11.49
Weighted-Average Exercise Price, Options vested and expected to vest at October 27, 2012 $ 11.41 [1]
Weighted-Average Exercise Price, Options exercisable at October 27, 2012 $ 8.47
Weighted-Average Remaining Contractual Terms (years)  
Weighted-Average Remaining Contractual Terms (years), Options outstanding - July 28, 2012 6.4
Weighted-Average Remaining Contractual Terms (years), Options outstanding - October 27, 2012 6.8
Weighted-Average Remaining Contractual Terms (years), Options vested and expected to vest at October 27, 2012 6.8 [1]
Weighted-Average Remaining Contractual Terms (years), Options exercisable at October 27, 2012 5.2
Aggregate Intrinsic Value  
Aggregate Intrinsic Value, Options oustanding - July 28, 2012 $ 130.1 [2]
Aggregate Intrinsic Value, Options oustanding - October 27, 2012 122.2 [2]
Aggregate Intrinsic Value, Options vested and expected to vest at October 27, 2012 120.9 [1],[2]
Aggregate Intrinsic Value, Options exercisable at October 27, 2012 $ 83.1 [2]
[1] The number of options expected to vest takes into consideration estimated expected forfeitures.
[2] The intrinsic value is the amount by which the market price at the end of the period of the underlying share of stock exceeds the exercise price of the stock option.