Three Months Ended

Six Months Ended

June 30,

Millions, Except Per Share Amounts

2023

2022

2023

2022

Net income

$

1,569

$

1,835

$

3,199

$

3,465

Weighted-average number of shares outstanding:

Basic

608.7

625.6

609.6

628.9

Dilutive effect of stock options

0.3

0.6

0.4

0.7

Dilutive effect of retention shares and units

0.5

0.6

0.5

0.6

Diluted

609.5

626.8

610.5

630.2

Earnings per share – basic

$

2.58

$

2.93

$

5.25

$

5.51

Earnings per share – diluted

$

2.57

$

2.93

$

5.24

$

5.50

Stock options excluded as their inclusion would be anti-dilutive

1.0

0.3

0.9

0.3