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Quarterly Financial Information | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information | Note 20: Quarterly Financial Information (Unaudited)
(in millions, except per share data) |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Total Year
2013 |  |  |  |  |  |  |  |  |  |
Revenue | $ | 15,310 | $ | 16,270 | $ | 16,151 | $ | 16,926 | $ | 64,657
Operating income | $ | 3,067 | $ | 3,435 | $ | 3,414 | $ | 3,647 | $ | 13,563
Net income attributable to Comcast Corporation | $ | 1,437 | $ | 1,734 | $ | 1,732 | $ | 1,913 | $ | 6,816
Basic earnings per common share attributable to Comcast Corporation shareholders | $ | 0.55 | $ | 0.66 | $ | 0.66 | $ | 0.73 | $ | 2.60
Diluted earnings per common share attributable to Comcast Corporation shareholders | $ | 0.54 | $ | 0.65 | $ | 0.65 | $ | 0.72 | $ | 2.56
Dividends declared per common share | $ | 0.195 | $ | 0.195 | $ | 0.195 | $ | 0.195 | $ | 0.78
2012 |  |  |  |  |  |  |  |  |  |
Revenue | $ | 14,878 | $ | 15,211 | $ | 16,544 | $ | 15,937 | $ | 62,570
Operating income | $ | 2,758 | $ | 3,079 | $ | 3,048 | $ | 3,294 | $ | 12,179
Net income attributable to Comcast Corporation | $ | 1,224 | $ | 1,348 | $ | 2,113 | $ | 1,518 | $ | 6,203
Basic earnings per common share attributable to Comcast Corporation shareholders | $ | 0.45 | $ | 0.50 | $ | 0.79 | $ | 0.57 | $ | 2.32
Diluted earnings per common share attributable to Comcast Corporation shareholders | $ | 0.45 | $ | 0.50 | $ | 0.78 | $ | 0.56 | $ | 2.28
Dividends declared per common share | $ | 0.1625 | $ | 0.1625 | $ | 0.1625 | $ | 0.1625 | $ | 0.65

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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=6372559&loc=d3e765-108305 Reference 2: 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=6372559&loc=d3e725-108305 Reference 3: 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=25249566&loc=d3e1280-108306 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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