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Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule Of Earnings Per Share Basic And Diluted | The following table sets forth the computation of basic and diluted net income per share (in millions except per share amounts):
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
NUMERATOR: |  |  |  |  |
Net income | $ | 3,488 |  |  | $ | 2,244 |  |  | $ | 2,181 |
Incremental income effect of interest on 5.25% convertible notes | — |  |  | 2 |  |  | 4 |
Net income after assumed conversion | $ | 3,488 |  |  | $ | 2,246 |  |  | $ | 2,185 |
DENOMINATOR: |  |  |  |  |  |  |
Weighted-average shares outstanding, basic | 601 |  |  | 627 |  |  | 661 |
Dilutive effect of Employee stock options and restricted stock units | 2 |  |  | 1 |  |  | 2 |
Dilutive effect of 5.25% convertible notes | — |  |  | 5 |  |  | 6 |
Adjusted weighted-average shares outstanding, diluted | 603 |  |  | 633 |  |  | 669 |
NET INCOME PER SHARE: |  |  |  |  |  |  |
Basic | $ | 5.80 |  |  | $ | 3.58 |  |  | $ | 3.30 |
Diluted | $ | 5.79 |  |  | $ | 3.55 |  |  | $ | 3.27 |

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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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