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.