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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Computation of diluted EPS | Computation of Diluted EPS
| Three Months Ended March 31
| 2019 |  | 2018
(in millions, except per share data) | Net Income Attributable to Comcast Corporation |  | Shares |  | Per Share Amount |  | Net Income Attributable to Comcast Corporation |  | Shares |  | Per Share Amount
Basic EPS attributable to Comcast Corporation shareholders | $ | 3,553 |  |  | 4,534 |  |  | $ | 0.78 |  |  | $ | 3,118 |  |  | 4,633 |  |  | $ | 0.67 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Assumed exercise or issuance of shares relating to stock plans |  |  | 60 |  |  |  |  |  |  | 72 |  |  |
Diluted EPS attributable to Comcast Corporation shareholders | $ | 3,553 |  |  | 4,594 |  |  | $ | 0.77 |  |  | $ | 3,118 |  |  | 4,705 |  |  | $ | 0.66 |

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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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