Stock-based Compensation Expense (Tables)

9 Months Ended

Oct. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

A summary of restricted stock unit activity for the nine months ended October 31, 2016 is as follows:

	Unvested Restricted Stock Units		Weighted average grant date fair value per share
	(in thousands)
Unvested restricted stock units at January 31, 2016	7,739.6		$	51.80
Granted	3,661.7		63.77
Vested	(2,848.8	)	50.46
Canceled/Forfeited	(609.6	)	52.53
Performance Adjustment (1)	(29.7	)	63.81
Unvested restricted stock units at October 31, 2016	7,913.2		$	58.41

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(1) Based on Autodesk's financial results and relative total stockholder return for the fiscal 2016 performance period. The performance stock units were attained at rates ranging from 86.1% to 98.0% of the target award.

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

The following table summarizes stock-based compensation expense for the three and nine months ended October 31, 2016 and 2015, respectively, as follows:

	Three Months Ended October 31,
	2016		2015
Cost of subscription	$	1.7	$	1.5
Cost of license and other revenue	1.8		1.7
Marketing and sales	24.2		22.3
Research and development	20.9		17.5
General and administrative	8.0		7.2
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	56.6	$	50.2
	Nine Months Ended October 31,
	2016		2015
Cost of subscription	$	5.2	$	4.1
Cost of license and other revenue	5.1		4.4
Marketing and sales	69.0		61.3
Research and development	60.0		49.9
General and administrative	23.2		21.4
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	162.5	$	141.1

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

Autodesk uses the following assumptions to estimate the fair value of stock-based awards:

	Three Months Ended October 31, 2016		Three Months Ended October 31, 2015
	Performance Stock Unit (1)	ESPP	Performance Stock Unit (1)	ESPP
Range of expected volatilities	N/A	31.0 - 33.9%	N/A	28.6 - 28.9%
Range of expected lives (in years)	N/A	0.5 - 2.0	N/A	0.5 - 2.0
Expected dividends	N/A	—%	N/A	—%
Range of risk-free interest rates	N/A	0.5 - 0.8%	N/A	0.2 - 0.7%
	Nine Months Ended October 31, 2016		Nine Months Ended October 31, 2015
	Performance Stock Unit	ESPP	Performance Stock Unit	ESPP
Range of expected volatilities	38.4 - 38.6%	30.0 - 40.2%	27.3%	27.7 - 28.9%
Range of expected lives (in years)	N/A	0.5 - 2.0	N/A	0.5 - 2.0
Expected dividends	—%	—%	—%	—%
Range of risk-free interest rates	0.6 - 0.7%	0.5 - 0.9%	0.2%	0.1 - 0.7%

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(1) Autodesk did not grant PSUs in the three months ended October 31, 2016 and 2015 that were subject to market conditions.