Employee and Director Stock Plans - Options Outstanding (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	Jan. 31, 2014		Jan. 31, 2013
Number of securities to be issued upon exercise of outstanding options	12.5
Weighted Average Exercise Price	$ 33.54		$ 32.69
Shares available for future issuance	59.7
Equity Compensation Plans Approved by Security Holders
Number of securities to be issued upon exercise of outstanding options	12.4
Weighted Average Exercise Price	$ 33.56
Shares available for future issuance	59.7	[1]
Equity Compensation Plans Not Approved by Security Holders
Number of securities to be issued upon exercise of outstanding options	0.1	[2]
Weighted Average Exercise Price	$ 24.20	[2]
Shares available for future issuance	0	[2]

[1] Included in this amount are 38.1 million securities available for future issuance under Autodesk’s ESP Plan.

[2] Amounts correspond to Autodesk’s Nonstatutory Stock Option Plan, which was terminated by the Board of Directors in December 2004.