($ in millions except per share amounts)

For the year ended December 31:

2021

2020

2019

Weighted-average number of shares on which earnings per share calculations are based

Basic

895,990,771

890,348,679

887,235,105

Add—incremental shares under stock-based compensation plans

6,883,290

4,802,940

4,199,440

Add—incremental shares associated with contingently issuable shares

1,766,940

1,412,352

1,378,831

Assuming dilution

904,641,001

896,563,971

892,813,376

Income from continuing operations

$

4,712

$

3,932

$

7,146

Income/(loss) from discontinued operations, net of tax

1,030

1,658

2,285

Net income on which basic earnings per share is calculated

$

5,743

$

5,590

$

9,431

Income from continuing operations

$

4,712

$

3,932

$

7,146

Net income applicable to contingently issuable shares

—

(2)

0

Income from continuing operations on which diluted earnings per share is calculated

$

4,712

$

3,930

$

7,146

Income/(loss) from discontinued operations, net of tax, on which basic and diluted earnings per share is calculated

1,030

1,658

2,285

Net income on which diluted earnings per share is calculated

$

5,743

$

5,588

$

9,431

Earnings/(loss) per share of common stock

Assuming dilution

Continuing operations

$

5.21

$

4.38

$

8.00

Discontinued operations

1.14

1.85

2.56

Total

$

6.35

$

6.23

$

10.56

Basic

Continuing operations

$

5.26

$

4.42

$

8.05

Discontinued operations

1.15

1.86

2.58

Total

$

6.41

$

6.28

$

10.63