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Quarterly Financial Information | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Information | Note 19: Quarterly Financial Information (Unaudited)
(in millions, except per share data) |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Total Year
2015 |  |  |  |  |  |  |  |  |  |
Revenue | $ | 17,853 | $ | 18,743 | $ | 18,669 | $ | 19,245 | $ | 74,510
Operating income | $ | 3,890 | $ | 4,105 | $ | 4,001 | $ | 4,002 | $ | 15,998
Net income attributable to Comcast Corporation | $ | 2,059 | $ | 2,137 | $ | 1,996 | $ | 1,971 | $ | 8,163
Basic earnings per common share attributable to Comcast Corporation shareholders | $ | 0.82 | $ | 0.85 | $ | 0.81 | $ | 0.80 | $ | 3.28
Diluted earnings per common share attributable to Comcast Corporation shareholders | $ | 0.81 | $ | 0.84 | $ | 0.80 | $ | 0.79 | $ | 3.24
Dividends declared per common share | $ | 0.25 | $ | 0.25 | $ | 0.25 | $ | 0.25 | $ | 1.00
2014 |  |  |  |  |  |  |  |  |  |
Revenue | $ | 17,408 | $ | 16,844 | $ | 16,791 | $ | 17,732 | $ | 68,775
Operating income | $ | 3,568 | $ | 3,804 | $ | 3,745 | $ | 3,787 | $ | 14,904
Net income attributable to Comcast Corporation(a) | $ | 1,871 | $ | 1,992 | $ | 2,592 | $ | 1,925 | $ | 8,380
Basic earnings per common share attributable to Comcast Corporation shareholders | $ | 0.72 | $ | 0.77 | $ | 1.00 | $ | 0.75 | $ | 3.24
Diluted earnings per common share attributable to Comcast Corporation shareholders | $ | 0.71 | $ | 0.76 | $ | 0.99 | $ | 0.74 | $ | 3.20
Dividends declared per common share | $ | 0.225 | $ | 0.225 | $ | 0.225 | $ | 0.225 | $ | 0.90
(a) In the third quarter of 2014, net income attributable to Comcast Corporation include d $7 59 million of favorable income tax adjustments resulting from a reduction in our accruals for uncertain tax positions and the related accrued interest on these tax positions. See Note 15 for additional information.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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