Earnings Per Share

12 Months Ended

Dec. 31, 2021

The following table sets forth the computation of basic and diluted net income per common share for the periods ended:


	2021		2020		2019
	(in millions, except per share amounts)
Net income	$	2,342.1	$	2,711.7	$	1,176.8

Basic weighted-average common shares outstanding	257.7		259.8		256.7
Effect of potentially dilutive securities:
Stock options	1.1		1.8		2.2
Restricted stock units (including PSUs)	1.1		1.7		1.7
Employee stock purchase program	0.0		0.1		0.1
Diluted weighted-average common shares outstanding	259.9		263.4		260.7

Basic net income per common share	$	9.09	$	10.44	$	4.58
Diluted net income per common share	$	9.01	$	10.29	$	4.51

We did not include the securities in the following table in the computation of the diluted net income per common share because the effect would have been anti-dilutive during each period:


	2021	2020	2019
	(in millions)
Stock options	0.7	0.3	2.8
Unvested restricted stock units (including PSUs)	0.4	0.3	—