Employee and Director Stock Plans - Schedule Of Share-based Compensation Options Activity (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended
Jan. 31, 2014
Number of Shares  
Options outstanding (in shares) 19.0
Granted (in shares) 0 [1]
Exercised (in shares) (9.2)
Canceled/Forfeited (in shares) (3.9)
Options outstanding (in shares) 5.9
Options exercisable (in shares) 4.0
Options vested and exercisable and expected to vest (in shares) 5.9 [2]
Options available for grant (in shares) 21.6
Weighted average price per share  
Options outstanding (per share) $ 32.69
Granted (per share) $ 0.00 [1]
Exercised (per share) $ 27.08
Canceled/Forfeited (per share) $ 44.67
Options outstanding (per share) $ 33.54
Options exercisable (per share) $ 30.98
Options vested and exercisable and expected to vest (per share) $ 33.52 [2]
Options outstanding, Weighted average contractual term 4 years 9 months 7 days
Options outstanding, Aggregate Intrinsic Value $ 105.3 [3]
Options vested and exercisable, Weighted average contractual term 3 years 11 months 26 days
Options vested and exercisable, Aggregate Intrinsic Value 80.3 [3]
Options vested and exercisable and expected to vest, Weighted average remaining contractual term 4 years 9 months 3 days [2]
Options vested and exercisable and expected to vest, Aggregate Intrinsic Value $ 105.0 [2],[3]
[1] Autodesk did not grant stock options in the twelve months ended January 31, 2014.
[2] Options expected to vest reflect an estimated forfeiture rate.
[3] Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $51.25 per share as of January 31, 2014, which would have been received by the option holders had all option holders exercised their options as of that date.