Net Income Per Share

6 Months Ended

Jun. 30, 2011

Net Income Per Share

Net Income Per Share

NOTE 10. NET INCOME PER SHARE

The following table presents the computation of basic and diluted net income per share (in millions, except per share data):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Net income	$	117.4	$	88.7	$	221.5	$	174.0
Basic:
Weighted-average shares outstanding		39.2		39.3		39.2		39.1
Basic net income per share	$	2.99	$	2.26	$	5.65	$	4.45
Diluted:
Weighted-average shares outstanding used in basic calculation		39.2		39.3		39.2		39.1
Add common stock equivalents		1.1		1.2		1.0		1.3
Weighted-average shares used in computing diluted net income per share		40.3		40.5		40.2		40.4
Diluted net income per share	$	2.91	$	2.19	$	5.51	$	4.31

Employee stock options to purchase approximately 2.5 million and 1.4 million weighted shares for the three months ended June 30, 2011 and 2010, respectively, and 2.2 million and 1.1 million weighted shares for the six months ended June 30, 2011 and 2010, respectively, were outstanding, but were not included in the computation of diluted net income per share because the effect of including such shares would have been antidilutive in the periods presented.