Employee and Director Stock Plans - Schedule Of Share-based Compensation Options Activity (Detail) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2016 USD ($) $ / shares shares
Number of Shares
Options outstanding (in shares) | shares	2.7
Granted (in shares) | shares	0.0	[1]
Exercised (in shares) | shares	(1.1)
Canceled/Forfeited (in shares) | shares	0.0
Options outstanding (in shares) | shares	1.6
Options exercisable (in shares) | shares	1.6
Options available for grant (in shares) | shares	19.6
Weighted average price per share
Options outstanding (per share) | $ / shares	$ 34.46
Granted (per share) | $ / shares	0.00	[1]
Exercised (per share) | $ / shares	30.88
Canceled/Forfeited (per share) | $ / shares	0.00
Options outstanding (per share) | $ / shares	37.06
Options exercisable (per share) | $ / shares	$ 37.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, Weighted average contractual term	3 years 8 months 15 days
Options outstanding, Aggregate Intrinsic Value | $	$ 15.4	[2]
Closing stock price (in dollars per share) | $ / shares	$ 46.82

[1] Autodesk did not grant stock options in the twelve months ended January 31, 2016.

[2] Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $46.82 per share as of January 31, 2016, which would have been received by the option holders had all option holders exercised their options as of that date.