Three Months Ended

Six Months Ended

June 30,

Millions

2022

2021

2022

2021

Net income

$

1,835

$

1,798

$

3,465

$

3,139

Weighted-average number of shares outstanding:

Basic

625.6

658.5

628.9

663.1

Dilutive effect of stock options

0.6

0.8

0.7

0.8

Dilutive effect of retention shares and units

0.6

0.8

0.6

0.8

Diluted

626.8

660.1

630.2

664.7

Earnings per share – basic

$

2.93

$

2.73

$

5.51

$

4.73

Earnings per share – diluted

$

2.93

$

2.72

$

5.50

$

4.72

Stock options excluded as their inclusion would be anti-dilutive

0.3

0.4

0.3

0.3