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.