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Note 7 - Investments (Tables) | 12 Months Ended
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Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract] |
Equity Method Investments [Table Text Block] |
| Ownership interest (1) |  | December 31,
|  | 2015 |  | 2014
Affiliated companies accounted for by the equity method |  |  |  |  |  |  |  |  |
Dow Corning |  | 50% |  |  | $ | 1,483 |  | $ | 1,325
All other | 20% | to | 50% |  |  | 422 |  |  | 452
|  |  |  |  |  | 1,905 |  |  | 1,777
Other investments |  |  |  |  |  | 70 |  |  | 24
Total |  |  |  |  | $ | 1,975 |  | $ | 1,801
Schedule of Affiliate Result of Operations [Table Text Block] |
| Years ended December 31,
| 2015 |  | 2014 |  | 2013
Statement of operations (1)(2): |  |  |  |  |  |  |  |
Net sales | $ | 6,461 |  | $ | 7,124 |  | $ | 8,526
Gross profit | $ | 1,606 |  | $ | 1,701 |  | $ | 2,655
Net income | $ | 586 |  | $ | 647 |  | $ | 1,135
Corning’s equity in earnings of affiliated companies | $ | 299 |  | $ | 266 |  | $ | 547
Related party transactions: |  |  |  |  |  |  |  |
Corning sales to affiliated companies | $ | 30 |  | $ | 13 |  | $ | 13
Corning purchases from affiliated companies | $ | 19 |  | $ | 25 |  | $ | 189
Corning transfers of assets, at cost, to affiliated companies (3) |  |  |  |  |  |  | $ | 37
Dividends received from affiliated companies | $ | 143 |  | $ | 130 |  | $ | 629
Royalty income from affiliated companies |  |  |  | $ | 2 |  | $ | 57
Corning services to affiliates |  |  |  |  |  |  | $ | 2
| Years ended December 31,
| 2015 |  | 2014 |  | 2013
Statement of operations: |  |  |  |  |  |  |  |
Net sales | $ | 5,649 |  | $ | 6,221 |  | $ | 5,711
Gross profit (1) | $ | 1,472 |  | $ | 1,543 |  | $ | 1,280
Net income attributable to Dow Corning | $ | 563 |  | $ | 513 |  | $ | 376
Corning’s equity in earnings of Dow Corning | $ | 281 |  | $ | 252 |  | $ | 196
Related party transactions: |  |  |  |  |  |  |  |
Corning purchases from Dow Corning | $ | 15 |  | $ | 15 |  | $ | 22
Dividends received from Dow Corning | $ | 143 |  | $ | 125 |  | $ | 100
Schedule of Affiliate Financial Position [Table Text Block] |
| December 31, |  |  |
| 2015 |  | 2014 |  |  |
Balance sheet: |  |  |  |  |  |  |  |
Current assets | $ | 5,228 |  | $ | 5,432 |  |  |
Noncurrent assets | $ | 6,453 |  | $ | 6,864 |  |  |
Short-term borrowings, including current portion of long-term debt | $ | 6 |  | $ | 7 |  |  |
Other current liabilities | $ | 1,461 |  | $ | 1,630 |  |  |
Long-term debt | $ | 800 |  | $ | 950 |  |  |
Other long-term liabilities | $ | 4,557 |  | $ | 5,143 |  |  |
Non-controlling interest | $ | 631 |  | $ | 634 |  |  |
Related party transactions: |  |  |  |  |  |  |  |
Balances due from affiliated companies | $ | 11 |  | $ | 19 |  |  |
Balances due to affiliated companies | $ | 1 |  | $ | 2 |  |  |
| December 31, |  |  |
| 2015 |  | 2014 |  |  |
Balance sheet: |  |  |  |  |  |  |  |
Current assets | $ | 4,511 |  | $ | 4,712 |  |  |
Noncurrent assets | $ | 6,064 |  | $ | 6,433 |  |  |
Short-term borrowings, including current portion of long-term debt | $ | 6 |  | $ | 7 |  |  |
Other current liabilities | $ | 1,305 |  | $ | 1,441 |  |  |
Long-term debt | $ | 785 |  | $ | 945 |  |  |
Other long-term liabilities | $ | 4,539 |  | $ | 5,125 |  |  |
Non-controlling interest | $ | 631 |  | $ | 634 |  |  |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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