Stock-based Compensation Expense (Tables)

6 Months Ended

Jul. 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 six months ended July 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	1,538.8		57.60
Vested	(1,008.0	)	56.00
Canceled/Forfeited	(475.7	)	51.70
Performance Adjustment (1)	(29.7	)	63.81
Unvested restricted stock units at July 31, 2016	7,765.0		$	52.66

 _______________

(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 six months ended July 31, 2016 and 2015, respectively, as follows:

	Three Months Ended July 31,
	2016		2015
Cost of subscription	$	1.7	$	1.2
Cost of license and other revenue	1.7		1.2
Marketing and sales	23.3		17.3
Research and development	20.2		14.8
General and administrative	7.4		6.2
Stock-based compensation expense related to stock awards and ESPP purchases	54.3		40.7
Tax benefit	—		(10.5		)
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	54.3	$	30.2
	Six Months Ended July 31,
	2016		2015
Cost of subscription	$	3.5	$	2.6
Cost of license and other revenue	3.3		2.7
Marketing and sales	44.8		39.0
Research and development	39.1		32.4
General and administrative	15.2		14.2
Stock-based compensation expense related to stock awards and ESPP purchases	105.9		90.9
Tax benefit	—		(24.5		)
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	105.9	$	66.4

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:

	Six Months Ended July 31, 2016		Six Months Ended July 31, 2015
	Performance Stock Unit	ESPP	Performance Stock Unit	ESPP
Range of expected volatilities	38.4 - 38.6%	35.0 - 40.2%	27.3%	27.7 - 28.2%
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 - 0.6%