| Computation of basic and diluted earnings per share |
| | | | | | | | | For the Three Months Ended | | | March 31, 2020 | | March 31, 2019 | Number of shares on which basic earnings per share is calculated: | | | | | | | Weighted-average shares outstanding during period | | | 887,969,345 | | | 889,581,542 | Add — Incremental shares under stock-based compensation plans | | | 5,740,415 | | | 3,372,460 | Add — Incremental shares associated with contingently issuable shares | | | 1,329,477 | | | 956,524 | Number of shares on which diluted earnings per share is calculated | | | 895,039,238 | | | 893,910,526 | | | | | | | | Income from continuing operations (millions) | | $ | 1,176 | | $ | 1,593 | Income/(loss) from discontinued operations, net of tax (millions) | | | (1) | | | (2) | Net income on which basic earnings per share is calculated (millions) | | $ | 1,175 | | $ | 1,591 | | | | | | | | Income from continuing operations (millions) | | $ | 1,176 | | $ | 1,593 | Net income applicable to contingently issuable shares (millions) | | | (2) | | | — | Income from continuing operations on which diluted earnings per share is calculated (millions) | | $ | 1,174 | | $ | 1,593 | Income/(loss) from discontinued operations, net of tax, on which basic and diluted earnings per share is calculated (millions) | | | (1) | | | (2) | Net income on which diluted earnings per share is calculated (millions) | | $ | 1,173 | | $ | 1,591 | | | | | | | | Earnings/(loss) per share of common stock: | | | | | | | Assuming dilution | | | | | | | Continuing operations | | $ | 1.31 | | $ | 1.78 | Discontinued operations | | | 0.00 | | | 0.00 | Total | | $ | 1.31 | | $ | 1.78 | Basic | | | | | | | Continuing operations | | $ | 1.32 | | $ | 1.79 | Discontinued operations | | | 0.00 | | | 0.00 | Total | | $ | 1.32 | | $ | 1.79 |
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