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Note 17 - Shareholders' Equity (Details) - Changes in Capital Stock - USD ($) shares in Millions, $ in Millions | 10 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Note 17 - Shareholders' Equity (Details) - Changes in Capital Stock [Line Items] |  |  |  |  |  |  |  |
Balance at December 31, 2012 (in Shares) |  |  |  | 1,672.0 |  |  |  |
Balance at December 31, 2012 |  |  |  | $ 836 |  |  |  |
Balance at December 31, 2012 (in Shares) |  |  |  | (398.0) |  |  |  |
Balance at December 31, 2012 |  |  |  | $ (6,727) |  |  |  |
Shares issued to benefit plans and for option exercises |  |  |  | $ 149 |  | $ 264 |  | $ 144
Shares purchased for treasury (in Shares) | 98.2 |  | 118.9 | 151.0 |  |  |  |
Shares purchased for treasury | $ (2,000) |  | $ (2,000) | $ (3,228) |  | (2,483) |  | (1,516)
Other, net |  |  |  | $ (25) |  | $ (7) |  | $ (33)
Balance (in Shares) | 1,672.0 |  |  | 1,681.0 |  | 1,672.0 |  |
Balance | $ 836 |  |  | $ 840 |  | $ 836 |  |
Balance (in Shares) | (398.0) |  |  | (551.0) |  | (398.0) |  |
Balance | $ (6,727) |  |  | $ (9,725) |  | $ (6,727) |  |
Common Stock [Member] |  |  |  |  |  |  |  |
Note 17 - Shareholders' Equity (Details) - Changes in Capital Stock [Line Items] |  |  |  |  |  |  |  |
Balance at December 31, 2012 (in Shares) |  |  |  | 1,672.0 | [1] | 1,661.0 |  | 1,649.0
Balance at December 31, 2012 |  |  |  | $ 836 | [1] | $ 831 |  | $ 825
Shares issued to benefit plans and for option exercises (in Shares) |  |  |  | 9.0 |  | 11.0 |  | 12.0
Shares issued to benefit plans and for option exercises |  |  |  | $ 4 |  | $ 5 |  | $ 6
Balance (in Shares) | 1,672.0 | [1] |  | 1,681.0 |  | 1,672.0 | [1] | 1,661.0
Balance | $ 836 | [1] |  | $ 840 |  | $ 836 | [1] | $ 831
Treasury Stock [Member] |  |  |  |  |  |  |  |
Note 17 - Shareholders' Equity (Details) - Changes in Capital Stock [Line Items] |  |  |  |  |  |  |  |
Balance at December 31, 2012 (in Shares) |  |  |  | (398.0) | [1] | (262.0) |  | (179.0)
Balance at December 31, 2012 |  |  |  | $ (6,727) | [1] | $ (4,099) |  | $ (2,773)
Shares issued to benefit plans and for option exercises |  |  |  | $ (1) |  | $ (2) |  | $ (1)
Shares purchased for treasury (in Shares) |  |  |  | (151.0) |  | (135.0) |  | (82.0)
Shares purchased for treasury |  |  |  | $ (2,978) |  | $ (2,612) |  | $ (1,316)
Other, net (in Shares) |  |  |  | (2.0) |  | (1.0) |  | (1.0)
Other, net |  |  |  | $ (19) |  | $ (14) |  | $ (9)
Balance (in Shares) | (398.0) | [1] |  | (551.0) |  | (398.0) | [1] | (262.0)
Balance | $ (6,727) | [1] |  | $ (9,725) |  | $ (6,727) | [1] | $ (4,099)
[1] | On January 15, 2014, in conjunction with the Acquisition of Corning Precision Materials, Corning issued 2,300 Fixed Rate Cumulative Convertible Preferred Stock, Series A ("Preferred Stock"), par value $100 per share, at an issue price of $1 million per share, for an aggregate issue price of $2.3 billion. There have been no further issuances or conversions of Preferred Stock since 2014.

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