($ in millions except per share amounts)

For the year ended December 31:

2019

2018

2017

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

Basic

887,235,105

912,048,072

932,828,295

Add—incremental shares under stock-based compensation plans

4,199,440

2,786,316

3,094,373

Add—incremental shares associated with contingently issuable shares

1,378,831

1,481,326

1,462,957

Assuming dilution

892,813,376

916,315,714

937,385,625

Income from continuing operations

$

9,435

$

8,723

$

5,758

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

(4)

5

(5)

Net income on which basic earnings per share is calculated

$

9,431

$

8,728

$

5,753

Income from continuing operations

$

9,435

$

8,723

$

5,758

Net income applicable to contingently issuable shares

0

(6)

(2)

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

$

9,435

$

8,718

$

5,756

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

(4)

5

(5)

Net income on which diluted earnings per share is calculated

$

9,431

$

8,722

$

5,752

Earnings/(loss) per share of common stock

Assuming dilution

Continuing operations

$

10.57

$

9.51

$

6.14

Discontinued operations

(0.01)

0.01

0.00

Total

$

10.56

$

9.52

$

6.14

Basic

Continuing operations

$

10.63

$

9.56

$

6.17

Discontinued operations

0.00

0.01

0.00

Total

$

10.63

$

9.57

$

6.17