v2.4.0.6
Stock Option Activity and Related Information (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 9 Months Ended
Jun. 30, 2012
Number of Options  
Beginning balance 11,866
Options granted   
Options assumed 41
Options cancelled (23)
Options exercised (3,910)
Ending balance 7,974
Exercisable at end of the period 7,869
Expected to vest after end of the period 105
Weighted-Average Exercise Price  
Beginning balance $ 108.64
Options granted   
Options assumed $ 30.92
Options cancelled $ 103.35
Options exercised $ 85.19
Ending balance $ 119.75
Exercisable at end of the period $ 119.93
Expected to vest after end of the period $ 106.00
Weighted - Average Remaining Contractual Term (in years)  
Ending balance (in years) 1 year 329 days
Exercisable at end of the period (in years) 1 year 329 days
Expected to vest after end of the period (in years) 4 years 329 days
Aggregate Intrinsic Value  
Ending balance $ 3,702,090
Exercisable at end of the period 3,652,052
Expected to vest after end of the period $ 50,039