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Basis of presentation and significant accounting policies and practices (Tables) | 9 Months Ended
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Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Earnings Per Share | Computation and reconciliation of earnings per common share are as follows (shares in millions):
| For Three Months Ended September 30, |  |  |  |  |  |  |  |  |  |
| 2019 |  |  |  |  |  | 2018 |  |  |  |
| Net Income |  | Shares |  | EPS |  | Net Income |  | Shares |  | EPS
Basic EPS: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 1,425 |  |  |  |  |  |  | $ | 1,570 |  |  |  |  |
Income allocated to RSUs | (9) |  |  |  |  |  |  | (12) |  |  |  |  |
Income allocated to common stock | $ | 1,416 |  |  | 935 |  |  | $ | 1.51 |  |  | $ | 1,558 |  |  | 969 |  |  | $ | 1.61 |
Dilutive effect of stock compensation plans |  |  | 15 |  |  |  |  |  |  | 20 |  |  |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 1,425 |  |  |  |  |  |  | $ | 1,570 |  |  |  |  |
Income allocated to RSUs | (8) |  |  |  |  |  |  | (11) |  |  |  |  |
Income allocated to common stock | $ | 1,417 |  |  | 950 |  |  | $ | 1.49 |  |  | $ | 1,559 |  |  | 989 |  |  | $ | 1.58 |
| For Nine Months Ended September 30, |  |  |  |  |  |  |  |  |  |
| 2019 |  |  |  |  |  | 2018 |  |  |  |
| Net Income |  | Shares |  | EPS |  | Net Income |  | Shares |  | EPS
Basic EPS: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 3,947 |  |  |  |  |  |  | $ | 4,341 |  |  |  |  |
Income allocated to RSUs | (25) |  |  |  |  |  |  | (34) |  |  |  |  |
Income allocated to common stock | $ | 3,922 |  |  | 937 |  |  | $ | 4.19 |  |  | $ | 4,307 |  |  | 976 |  |  | $ | 4.41 |
Dilutive effect of stock compensation plans |  |  | 16 |  |  |  |  |  |  | 21 |  |  |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 3,947 |  |  |  |  |  |  | $ | 4,341 |  |  |  |  |
Income allocated to RSUs | (25) |  |  |  |  |  |  | (34) |  |  |  |  |
Income allocated to common stock | $ | 3,922 |  |  | 953 |  |  | $ | 4.12 |  |  | $ | 4,307 |  |  | 997 |  |  | $ | 4.32 |

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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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