Earnings Per Share

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

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

	Three Months Ended March 31,
	2022		2021
	(in millions, except per share amounts)
Net income	$	762.1	$	653.1
Basic weighted-average common shares outstanding	255.1		259.4
Effect of potentially dilutive securities:
Stock options	1.3		1.2
Restricted stock units (including PSUs)	1.4		1.3
Employee stock purchase program	0.1		0.0
Diluted weighted-average common shares outstanding	257.9		261.9
Basic net income per common share	$	2.99	$	2.52
Diluted net income per common share	$	2.96	$	2.49

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:

	Three Months Ended March 31,
	2022	2021
	(in millions)
Stock options	0.0	0.4
Unvested restricted stock units (including PSUs)	0.6	0.7