XML 45 R45.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stock-based Compensation Expense Stock-Based Compensation Expense - Additional Information (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Apr. 30, 2013
StockPlans
Apr. 30, 2012
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Share based compensation arragements by share based payment awards, number of active plans (presented as an integer) 2  
Share based compensation arrangement by share based payment award expired or terminated plans (presented as an integer) 8  
Share-Based Compensation Shares Granted to Share Issued $ 2.11  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 0 [1]  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in usd) $ 27.0  
Share Based Compensation Non Vested Options Outstanding Weighted Average Remaining Contractual Term (in years) 1 year 2 months 12 days  
Sale of Stock, Price Per Share (in usd per share) $ 39.38  
Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Restricted Shares (in usd) 27.0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in usd per share)   $ 13.43 [2]
Employee Stock Plan 2012 [Member]
   
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 21,200,000  
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures 15,200,000  
Stock Issued During Period, Shares, Share-based Compensation, Forfeited 6,000,000  
Share-Based Compensation Shares Granted to Share Issued $ 1.79  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 9,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years) 3 years  
Employee Stock Plan Shares Remaining Available For Issuance 10,300,000  
Employee Stock Plan 2012 [Member] | Maximum [Member]
   
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Share based compensation arrangement by share based payment award options expiration term (in years) 10 years  
Directors stock plan 2012 [Member]
   
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 2,600,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 200,000  
Employee Stock Plan Shares Remaining Available For Issuance 2,400,000  
Directors stock plan 2012 [Member] | Maximum [Member]
   
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years) 3 years  
Directors stock plan 2012 [Member] | Minimum [Member]
   
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years) 1 year  
Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member]
   
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Employee Stock Plan Shares Remaining Available For Issuance 34,700,000  
Employee Stock Purchase Plan Maximum Percentage Of Compensation To Purchase Shares By Eligible Participants (presented as a percent) 15.00%  
Employee Stock Purchase Plan Minimum Percentage Of Common Stock Fair Value Defined To Purchase Shares By Eligible Participants (presented as a percent) 85.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period 10,000,000  
Share Based Compensation Arrangement By Share Based Payment Award Options Other Increases Decreases In Period Percentage Calculation (presented as a percent) 2.00%  
Stock Issued During Period, Shares, Employee Stock Purchase Plans 1,500,000 1,600,000
Share Based Compensation Arrangement By Share Based Payment Award Shares Issued Average Price (in usd per share) $ 22.32 $ 21.63
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in usd per share) $ 11.84 $ 14.00
Restricted Stock Units (RSUs) [Member]
   
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition (in years) 1 year 9 months 21 days  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in usd) 97.5  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 500,000  
Allocated Share-based Compensation Expense (in usd) 16.0 10.8
Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Restricted Shares (in usd) 97.5  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 4,400,000  
Performance Shares [Member]
   
Compensation Related Costs Share Based Payments Disclosure [Line Items]    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition (in years) 1 year 8 months 12 days  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in usd) 11.1  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 500,000  
Allocated Share-based Compensation Expense (in usd) 2.7 1.2
Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Restricted Shares (in usd) $ 11.1  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 800,000  
[1] Autodesk did not grant stock options in the three months ended April 30, 2013.
[2] The weighted average grant date fair value of stock options granted is calculated, as of the stock option grant date, using the Black-Scholes-Merton option pricing model.