| Schedule of quarterly financial information |
| | | | | | | | | | | | | | | | | (in millions, except per share data) | First
Quarter |
| Second
Quarter |
| Third
Quarter |
| Fourth
Quarter |
| Total
Year |
| 2018 | | | | | | Revenue | $ | 22,791 |
| $ | 21,735 |
| $ | 22,135 |
| $ | 27,846 |
| $ | 94,507 |
| Operating income | $ | 4,645 |
| $ | 5,014 |
| $ | 4,836 |
| $ | 4,514 |
| $ | 19,009 |
| Net income attributable to Comcast Corporation | $ | 3,118 |
| $ | 3,216 |
| $ | 2,886 |
| $ | 2,511 |
| $ | 11,731 |
| Basic earnings per common share attributable to Comcast Corporation shareholders | $ | 0.67 |
| $ | 0.70 |
| $ | 0.63 |
| $ | 0.55 |
| $ | 2.56 |
| Diluted earnings per common share attributable to Comcast Corporation shareholders | $ | 0.66 |
| $ | 0.69 |
| $ | 0.62 |
| $ | 0.55 |
| $ | 2.53 |
| Dividends declared per common share | $ | 0.19 |
| $ | 0.19 |
| $ | 0.19 |
| $ | 0.19 |
| $ | 0.76 |
| 2017 | | | | | | Revenue | $ | 20,587 |
| $ | 21,286 |
| $ | 21,081 |
| $ | 22,075 |
| $ | 85,029 |
| Operating income | $ | 4,542 |
| $ | 4,568 |
| $ | 4,779 |
| $ | 4,129 |
| $ | 18,018 |
| Net income attributable to Comcast Corporation(a) | $ | 2,573 |
| $ | 2,521 |
| $ | 2,642 |
| $ | 14,999 |
| $ | 22,735 |
| Basic earnings per common share attributable to Comcast Corporation shareholders | $ | 0.54 |
| $ | 0.53 |
| $ | 0.56 |
| $ | 3.22 |
| $ | 4.83 |
| Diluted earnings per common share attributable to Comcast Corporation shareholders | $ | 0.53 |
| $ | 0.52 |
| $ | 0.55 |
| $ | 3.17 |
| $ | 4.75 |
| Dividends declared per common share | $ | 0.1575 |
| $ | 0.1575 |
| $ | 0.1575 |
| $ | 0.1575 |
| $ | 0.63 |
|
Minor differences may exist due to rounding. | | (a) | In the fourth quarter of 2017, net income attributable to Comcast Corporation included a $12.7 billion net income tax benefit as a result of the impacts of the 2017 tax reform legislation. See Note 5 for additional information. |
|