NET INCOME PER SHARE

6 Months Ended

Jun. 30, 2020

Basic and diluted net income per share are calculated using the treasury stock method.


(in millions, except share and per share data)	Three Months Ended June 30,						Six Months Ended June 30,
	2020		2019		2020		2019
Basic
Net income	$	595.9	$	471.0	$	917.6	$	716.2
Average shares outstanding	90,469,663		91,775,295		90,772,818		91,864,062
Basic net income per share	$	6.59	$	5.13	$	10.11	$	7.80

Diluted
Net income	$	595.9	$	471.0	$	917.6	$	716.2
Average shares outstanding assuming dilution:
Average shares outstanding	90,469,663		91,775,295		90,772,818		91,864,062
Stock options and other contingently issuable shares ⁽¹⁾	1,463,195		1,733,040		1,644,840		1,649,069
Non-vested restricted stock grants	19,940		53,390		20,117		53,496
Average shares outstanding assuming dilution	91,952,798		93,561,725		92,437,775		93,566,627
Diluted net income per share	$	6.48	$	5.03	$	9.93	$	7.65

⁽¹⁾There were 469,235 stock options and other contingently issuable shares excluded due to their anti-dilutive effect for the three and six months ended June 30, 2020. There were no stock options and other contingently issuable shares excluded due to their anti-dilutive effect for the three months ended June 30, 2019. There were 17,286 stock options and other contingently issuable shares excluded due to their anti-dilutive effect for the six months ended June 30, 2019.