NET INCOME PER SHARE (Tables)

9 Months Ended

Sep. 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 September 30,						Nine Months Ended September 30,
	2020		2019		2020		2019
Basic
Net income	$	705.8	$	576.5	$	1,623.4	$	1,292.7
Average shares outstanding	90,537,314		91,823,573		90,694,317		91,850,565
Basic net income per share	$	7.80	$	6.28	$	17.90	$	14.07

Diluted
Net income	$	705.8	$	576.5	$	1,623.4	$	1,292.7
Average shares outstanding assuming dilution:
Average shares outstanding	90,537,314		91,823,573		90,694,317		91,850,565
Stock options and other contingently issuable shares ⁽¹⁾	1,561,994		1,742,298		1,546,419		1,611,078
Non-vested restricted stock grants	10,921		38,389		17,052		48,461
Average shares outstanding assuming dilution	92,110,229		93,604,260		92,257,788		93,510,104
Diluted net income per share	$	7.66	$	6.16	$	17.60	$	13.82

⁽¹⁾There were no stock options and other contingently issuable shares excluded due to their anti-dilutive effect for the three months ended September 30, 2020 and September 30, 2019. There were 63,753 and 9,853 stock options and other contingently issuable shares excluded due to their anti-dilutive effect for the nine months ended September 30, 2020 and September 30, 2019, respectively.