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Earnings Per Share (EPS) and Dividends (Tables) | 9 Months Ended
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Sep. 30, 2015
Earnings Per Share [Abstract] |
Basic And Diluted Earnings Per Share Computation | The following table shows the effect of these stock options, performance units and restricted stock units on the weighted average number of shares outstanding used in calculating diluted EPS.
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |
|  | 2015 |  | 2014 |  | 2015 |  | 2014 |
|  | Basic |  | Diluted |  | Basic |  | Diluted |  | Basic |  | Diluted |  | Basic |  | Diluted |
| EPS Numerator (Millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Net Income | $ | 439 |  |  | $ | 439 |  |  | $ | 444 |  |  | $ | 444 |  |  | $ | 1,370 |  |  | $ | 1,370 |  |  | $ | 1,042 |  |  | $ | 1,042 |  |
| EPS Denominator (Millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Weighted Average Common Shares Outstanding | 505 |  |  | 505 |  |  | 506 |  |  | 506 |  |  | 505 |  |  | 505 |  |  | 506 |  |  | 506 |  |
| Effect of Stock Based Compensation Awards | — |  |  | 3 |  |  | — |  |  | 1 |  |  | — |  |  | 3 |  |  | — |  |  | 1 |  |
| Total Shares | 505 |  |  | 508 |  |  | 506 |  |  | 507 |  |  | 505 |  |  | 508 |  |  | 506 |  |  | 507 |  |
| EPS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Net Income | $ | 0.87 |  |  | $ | 0.87 |  |  | $ | 0.88 |  |  | $ | 0.87 |  |  | $ | 2.71 |  |  | $ | 2.70 |  |  | $ | 2.06 |  |  | $ | 2.05 |  |
Dividend Payments On Common Stock |
|  | Three Months Ended |  | Nine Months Ended |
|  | September 30, |  | September 30, |
| Dividend Payments on Common Stock | 2015 |  | 2014 |  | 2015 |  | 2014 |
| Per Share | $ | 0.39 |  |  | $ | 0.37 |  |  | $ | 1.17 |  |  | $ | 1.11 |  |
| In Millions | $ | 198 |  |  | $ | 187 |  |  | $ | 592 |  |  | $ | 561 |  |

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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/2003/role/presentationRef -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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