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Earnings per share (Tables) | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Computation for basic and diluted earnings per share | The computations for basic and diluted EPS were as follows (in millions, except per-share data):
| Three months ended September 30, |  | Nine months ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Income (Numerator): |  |  |  |  |  |  |
Net income for basic and diluted EPS | $ | 1,968 |  |  | $ | 1,859 |  |  | $ | 6,139 |  |  | $ | 6,466 |
Shares (Denominator): |  |  |  |  |  |  |
Weighted-average shares for basic EPS | 599 |  |  | 645 |  |  | 609 |  |  | 669 |
Effect of dilutive securities | 3 |  |  | 4 |  |  | 4 |  |  | 4 |
Weighted-average shares for diluted EPS | 602 |  |  | 649 |  |  | 613 |  |  | 673 |
Basic EPS | $ | 3.29 |  |  | $ | 2.88 |  |  | $ | 10.08 |  |  | $ | 9.67 |
Diluted EPS | $ | 3.27 |  |  | $ | 2.86 |  |  | $ | 10.01 |  |  | $ | 9.61 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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