Net Income per Share (Notes)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Net Income per Share

The Company computed basic and diluted net income per share attributable to Juniper Networks common stockholders as follows (in millions, except per share amounts):

	Years Ended December 31,
	2011		2010		2009
Numerator:
Net income attributable to Juniper Networks	$	425.1	$	618.4	$	117.0
Denominator:
Weighted-average shares used to compute basic net income per share	529.8		522.4		523.6
Dilutive effect of employee stock awards	11.6		16.4		10.4
Weighted-average shares used to compute diluted net income per share	541.4		538.8		534.0
Net income per share attributable to Juniper Networks common stockholders:
Basic	$	0.80	$	1.18	$	0.22
Diluted	$	0.79	$	1.15	$	0.22

Basic net income per share is computed using net income available to common stockholders and the weighted-average number of common shares outstanding for the period. Diluted net income per share is computed using net income available to common stockholders and the weighted-average number of common shares outstanding plus potentially dilutive common shares outstanding during the period. Dilutive potential common shares consist of common shares issuable upon exercise of stock options, employee stock purchase plan, vesting of restricted stock units ("RSUs"), and vesting of performance share awards ("PSAs").

The Company excludes both outstanding stock options with exercise prices that are greater than the average market price and RSUs with grant date fair market value that are greater than the average market price from the calculation of diluted net income per share because their effect would be anti-dilutive. The Company includes the common shares underlying PSAs in the calculation of diluted net income per share when they become contingently issuable and excludes such shares when they are not contingently issuable. Potentially dilutive common shares of approximately 17.4 million, 14.0 million, and 38.9 million shares were outstanding but were not included in the computation of diluted earnings per share for the years ended December 31, 2011, 2010, and 2009, respectively.