Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions		Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital Common [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Total Corning Incorporated Shareholders' Equity [Member]	Non-controlling Interests [Member]	Total
Balance at Dec. 31, 2016		$ 2,300	$ 846	$ 13,695	$ 16,880	$ (14,152)	$ (1,676)	$ 17,893	$ 67	$ 17,960
Net (loss) income					(497)			(497)	18	(479)
Other comprehensive income (loss)							834	834	6	840
Purchase of common stock for treasury				14		(2,462)		(2,448)		(2,448)
Shares issued to benefit plans and for option exercises			8	349		(2)		355		355
Common Dividends					(556)			(556)		(556)
Preferred Dividends ($42,500 per share)					(98)			(98)		(98)
Other, net	[1]			31	201	(17)		215	(19)	196
Balance at Dec. 31, 2017		2,300	854	14,089	15,930	(16,633)	(842)	15,698	72	15,770
Net (loss) income					1,066			1,066	24	1,090
Other comprehensive income (loss)							(168)	(168)	(1)	(169)
Purchase of common stock for treasury						(2,230)		(2,230)		(2,230)
Shares issued to benefit plans and for option exercises			3	123				126		126
Common Dividends					(590)			(590)		(590)
Preferred Dividends ($42,500 per share)					(98)			(98)		(98)
Other, net					(5)	(7)		(12)	(1)	(13)
Balance at Dec. 31, 2018		2,300	857	14,212	16,303	(18,870)	(1,010)	13,792	94	13,886
Net (loss) income					960			960	19	979
Other comprehensive income (loss)							(161)	(161)		(161)
Purchase of common stock for treasury						(925)		(925)		(925)
Shares issued to benefit plans and for option exercises			2	111				113		113
Common Dividends					(625)			(625)		(625)
Preferred Dividends ($42,500 per share)					(98)			(98)		(98)
Other, net	[2]				(132)	(17)		(149)	(23)	(172)
Balance at Dec. 31, 2019		$ 2,300	$ 859	$ 14,323	$ 16,408	$ (19,812)	$ (1,171)	$ 12,907	$ 90	$ 12,997

[1] Adjustment to retained earnings of $233 million includes the cumulative effect of the accounting change recorded upon adoption of the new standard improving employee share-based payment accounting.

[2] Adjustments to retained earnings including the effect of Adjustments to retained earnings include the effect of the accounting change we recorded upon adoption of the new standard for reclassification of stranded tax effects in accumulated other comprehensive income (“AOCI”) in the amount of $53 million, and a $(186) million, net of tax, effect from an equity affiliate’s adoption of the new revenue standard.