Stock-based Compensation Expense (Tables)

3 Months Ended

Apr. 30, 2012

Notes to Financial Statements [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

A summary of stock option activity for the three months ended April 30, 2012 is as follows:

	Number of Shares		Weighted average exercise price per share		Weighted average remaining contractual term	Aggregate Intrinsic Value
	(in millions)				(in years)	(in millions)
Options outstanding at January 31, 2012	28.4		$	31.39
Granted	0.1		36.66
Exercised	(4.5	)	26.65
Canceled	(1.6	)	37.77
Options outstanding at April 30, 2012	22.4		$	31.92	4.3	$	202.1
Options vested and exercisable at April 30, 2012	15.7		$	30.81	3.1	$	161.9
Options vested and exercisable as of April 30, 2012 and expected to vest thereafter (1)	22.0		$	31.82	4.3	$	200.6
Options available for grant at April 30, 2012	13.9

 _______________

(1) Options expected to vest reflect an estimated forfeiture rate.

Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted

The following table summarizes information about the pre-tax intrinsic value of options exercised, and the weighted average grant date fair value per share of options granted, during the three months ended April 30, 2012, and 2011.

	Three Months Ended
	April 30, 2012		April 30, 2011
Pre-tax intrinsic value of options exercised (1)	$	60.3	$	59.6
Weighted average grant date fair value per share of stock options granted (2)	$	13.43	$	14.40

 _______________

(1) The intrinsic value of options exercised is calculated as the difference between the exercise price of the option and the market value of the stock on the date of exercise.

(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.

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about options outstanding and exercisable at April 30, 2012:

	Options Exercisable						Options Outstanding
	Number of Shares (in millions)	Weighted average contractual life (in years)	Weighted average exercise price		Aggregate intrinsic value (1) (in millions)		Number of Shares (in millions)	Weighted average contractual life (in years)	Weighted average exercise price		Aggregate intrinsic value (1) (in millions)
Range of per-share exercise prices:
$2.28 - $17.39	4.0		$	13.46			4.6		$	13.79
$17.53 - $29.49	2.8		26.97				4.8		27.80
$29.50 - $38.55	3.5		32.79				4.6		32.90
$39.69 - $43.81	1.7		41.69				4.6		41.88
$45.20 - $49.80	3.7		45.76				3.8		45.76
	15.7	3.1	$	30.81	$	161.9	22.4	4.3	$	31.92	$	202.1

 _______________

(1) Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $39.37 per share as of April 30, 2012, which would have been received by the option holders had all option holders exercised their options as of that date.

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

A summary of restricted stock unit and restricted stock award activity for the three months ended April 30, 2012 is as follows:

	Unreleased Restricted Stock		Weighted average grant date fair value per share
	(in thousands)
Unreleased restricted stock at January 31, 2012	2,184.1		$	36.65
Awarded	1,163.9		33.32
Released	(263.0	)	36.05
Forfeited	(24.2	)	38.72
Unreleased restricted stock at April 30, 2012	3,060.8		$	35.42

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table summarizes stock-based compensation expense for the three months ended April 30, 2012 and 2011, respectively, as follows:

	Three Months Ended April 30, 2012			Three Months Ended April 30, 2011
Cost of license and other revenue	$	1.3		$	0.9
Marketing and sales	14.6			11.8
Research and development	11.1			8.9
General and administrative	6.4			4.3
Stock-based compensation expense related to stock awards and ESP Plan purchases	33.4			25.9
Tax benefit	(8.7		)	(7.6		)
Stock-based compensation expense related to stock awards and ESP Plan purchases, net of tax	$	24.7		$	18.3

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

	Three Months Ended April 30, 2012		Three Months Ended April 30, 2011
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	44 - 45%	41 - 43%	40 - 43%	34 - 37%
Range of expected lives (in years)	3.6 - 4.6	0.5 - 2.0	2.6 - 4.4	0.5 - 2.0
Expected dividends	—%	—%	—%	—%
Range of risk-free interest rates	0.5 - 0.8	0.1 - 0.3%	0.9 - 1.9%	0.2 - 0.8%
Expected forfeitures	7.8%	7.8%	10.5%	10.5%