Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Basic and Diluted Net Income (Loss) Per Share

The calculations of basic and diluted net income per share are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
(In millions, except per share data)	2021		2020		2021		2020
Net income - basic and diluted	$	3,098.9	$	897.3	$	4,214.1	$	1,521.9
Weighted average shares - basic	105.0		109.6		105.2		109.7
Effect of dilutive securities:
Stock options	4.8		7.8		4.7		6.7
Restricted stock awards and restricted stock units	1.0		0.5		0.8		0.4
Weighted average shares - diluted	110.8		117.9		110.7		116.8
Net income per share - basic	$	29.51	$	8.19	$	40.06	$	13.87
Net income per share - diluted	$	27.97	$	7.61	$	38.07	$	13.03

Antidilutive Securities

Shares which have been excluded from diluted per share amounts because their effect would have been antidilutive include the following:

	Three Months Ended June 30,		Six Months Ended June 30,
(Shares in millions)	2021	2020	2021	2020
Stock options	5.0	0.1	5.0	3.5