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Note 5 - Earnings Per Common Share | 9 Months Ended
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Sep. 30, 2015
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | 5. Earnings per Common Share The following table sets forth the computation of basic and diluted earnings per common share (in millions, except per share amounts):
| Three months ended September 30, |  | Nine months ended September 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Net income attributable to Corning Incorporated | $ | 212 |  | $ | 1,014 |  | $ | 1,115 |  | $ | 1,484
Less: Series A convertible preferred stock dividend |  | 24 |  |  | 24 |  |  | 73 |  |  | 70
Net income available to common stockholders - basic |  | 188 |  |  | 990 |  |  | 1,042 |  |  | 1,414
Plus: Series A convertible preferred stock dividend (1) |  |  |  |  | 24 |  |  | 73 |  |  | 70
Net income available to common stockholders - diluted | $ | 188 |  | $ | 1,014 |  | $ | 1,115 |  | $ | 1,484
Weighted-average common shares outstanding - basic |  | 1,210 |  |  | 1,284 |  |  | 1,241 |  |  | 1,315
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Stock options and other dilutive securities |  | 8 |  |  | 12 |  |  | 10 |  |  | 12
Series A convertible preferred stock (1) |  |  |  |  | 115 |  |  | 115 |  |  | 109
Weighted-average common shares outstanding - diluted |  | 1,218 |  |  | 1,411 |  |  | 1,366 |  |  | 1,436
Basic earnings per common share | $ | 0.16 |  | $ | 0.77 |  | $ | 0.84 |  | $ | 1.08
Diluted earnings per common share | $ | 0.15 |  | $ | 0.72 |  | $ | 0.82 |  | $ | 1.03
Antidilutive potential shares excluded from diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |
Series A convertible preferred stock (1) |  | 115 |  |  |  |  |  |  |  |  |
Employee stock options and awards |  | 29 |  |  | 23 |  |  | 22 |  |  | 24
Accelerated share repurchase forward contract |  |  |  |  |  |  |  |  |  |  | 4
Total |  | 144 |  |  | 23 |  |  | 22 |  |  | 28
(1) | In the three months ended September 30, 2015, the Series A convertible preferred stock was anti-dilutive and therefore excluded from the calculation of diluted earnings per share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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