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Earnings Per Share (EPS) and Dividends (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Basic And Diluted Earnings Per Share Computation | The following table shows the effect of these stock options, PSUs and RSUs on the weighted average number of shares outstanding used in calculating diluted EPS:
|  |  | Years Ended December 31, |
|  |  | 2020 |  | 2019 |  | 2018 |
|  |  | Basic |  | Diluted |  | Basic |  | Diluted |  | Basic |  | Diluted |
| EPS Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |
| (Millions) |  |  |  |  |  |  |  |  |  |  |  |  |
| Net Income |  | $ | 1,905 |  |  | $ | 1,905 |  |  | $ | 1,693 |  |  | $ | 1,693 |  |  | $ | 1,438 |  |  | $ | 1,438 |  |
| EPS Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |
| (Millions) |  |  |  |  |  |  |  |  |  |  |  |  |
| Weighted Average Common Shares Outstanding |  | 504 |  |  | 504 |  |  | 504 |  |  | 504 |  |  | 504 |  |  | 504 |  |
| Effect of Stock Based Compensation Awards |  | — |  |  | 3 |  |  | — |  |  | 3 |  |  | — |  |  | 3 |  |
| Total Shares |  | 504 |  |  | 507 |  |  | 504 |  |  | 507 |  |  | 504 |  |  | 507 |  |
| EPS: |  |  |  |  |  |  |  |  |  |  |  |  |
| Net Income |  | $ | 3.78 |  |  | $ | 3.76 |  |  | $ | 3.35 |  |  | $ | 3.33 |  |  | $ | 2.85 |  |  | $ | 2.83 |  |
Dividend Payments On Common Stock |
|  |  | Years Ended December 31, |
| Dividend Payments on Common Stock |  | 2020 |  | 2019 |  | 2018 |
| Per Share |  | $ | 1.96 |  |  | $ | 1.88 |  |  | $ | 1.80 |  |
| in Millions |  | $ | 991 |  |  | $ | 950 |  |  | $ | 910 |  |

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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