(Dollars in millions except per share amounts)

For the three months ended March 31:

2021

2020

Number of shares on which basic earnings per share is calculated:

Weighted-average shares outstanding during period

893,630,916

887,969,345

Add — Incremental shares under stock-based compensation plans

6,622,441

5,740,415

Add — Incremental shares associated with contingently issuable shares

1,492,709

1,329,477

Number of shares on which diluted earnings per share is calculated

901,746,065

895,039,238

Income from continuing operations

$

956

$

1,176

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

(1)

Net income on which basic earnings per share is calculated

$

955

$

1,175

Income from continuing operations

$

956

$

1,176

Net income applicable to contingently issuable shares

—

(2)

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

$

956

$

1,174

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

(1)

Net income on which diluted earnings per share is calculated

$

955

$

1,173

Earnings/(loss) per share of common stock:

Assuming dilution

Continuing operations

$

1.06

$

1.31

Discontinued operations

0.00

Total

$