Net Income Per Share

12 Months Ended

Jan. 31, 2013

Notes to Financial Statements [Abstract]

Net Income Per Share

Net Income Per Share

Basic net income per share is computed using the weighted average number of shares of common stock outstanding for the period, including restricted stock awards and excluding stock options and restricted stock units. Diluted net income per share is based upon the weighted average shares of common stock outstanding for the period and potentially dilutive common shares, including the effect of stock options and restricted stock units under the treasury stock method. The following table sets forth the computation of the numerators and denominators used in the basic and diluted net income per share amounts:

	Fiscal Year Ended January 31,
	2013		2012		2011
Numerator:
Net income	$	247.4	$	285.3	$	212.0
Denominator:
Denominator for basic net income per share—weighted average shares	226.4		227.7		227.6
Effect of dilutive securities	5.3		5.6		6.6
Denominator for dilutive net income per share	231.7		233.3		234.2
Basic net income per share	$	1.09	$	1.25	$	0.93
Diluted net income per share	$	1.07	$	1.22	$	0.90

The computation of diluted net income per share does not include shares that are anti-dilutive under the treasury stock method because their exercise prices are higher than the average market value of Autodesk’s stock during the fiscal year. For the fiscal years ended January 31, 2013, 2012 and 2011, 9.6 million, 12.9 million and 19.3 million potentially anti-dilutive shares, respectively, were excluded from the computation of net income per share.