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 [Member]	Total Corning Incorporated Shareholders' Equity [Member]	Non-controlling Interests [Member]	Total
Balance at Dec. 31, 2018		$ 2,300	$ 857	$ 14,212	$ 16,303	$ (18,870)	$ (1,010)	$ 13,792	$ 94	$ 13,886
Net (loss) income					499			499	6	505
Other comprehensive income (loss)							(156)	(156)		(156)
Purchase of common stock for treasury						(244)		(244)		(244)
Shares issued to benefit plans and for option exercises				31				31		31
Common dividends					(158)			(158)		(158)
Preferred dividends ($10,625 per share)					(24)			(24)		(24)
Other, net	[1]				(131)	(2)		(133)	(1)	(134)
Balance at Mar. 31, 2019		2,300	857	14,243	16,489	(19,116)	(1,166)	13,607	99	13,706
Balance at Dec. 31, 2018		2,300	857	14,212	16,303	(18,870)	(1,010)	13,792	94	13,886
Balance at Sep. 30, 2019		2,300	859	14,295	16,555	(19,588)	(1,387)	13,034	100	13,134
Balance at Mar. 31, 2019		2,300	857	14,243	16,489	(19,116)	(1,166)	13,607	99	13,706
Net (loss) income					92			92	13	105
Other comprehensive income (loss)							36	36		36
Purchase of common stock for treasury						(151)		(151)		(151)
Shares issued to benefit plans and for option exercises			1	34				35		35
Common dividends					(157)			(157)		(157)
Preferred dividends ($10,625 per share)					(25)			(25)		(25)
Other, net						(12)		(12)	(16)	(28)
Balance at Jun. 30, 2019		2,300	858	14,277	16,399	(19,279)	(1,130)	13,425	96	13,521
Net (loss) income					337			337	4	341
Other comprehensive income (loss)							(257)	(257)		(257)
Purchase of common stock for treasury						(308)		(308)		(308)
Shares issued to benefit plans and for option exercises			1	18				19		19
Common dividends					(156)			(156)		(156)
Preferred dividends ($10,625 per share)					(24)			(24)		(24)
Other, net					(1)	(1)		(2)		(2)
Balance at Sep. 30, 2019		2,300	859	14,295	16,555	(19,588)	(1,387)	13,034	100	13,134
Balance at Dec. 31, 2019		2,300	859	14,323	16,408	(19,812)	(1,171)	12,907	90	12,997
Net (loss) income					(96)			(96)		(96)
Other comprehensive income (loss)							(326)	(326)	(1)	(327)
Purchase of common stock for treasury						(105)		(105)		(105)
Shares issued to benefit plans and for option exercises				17				17		17
Common dividends					(168)			(168)		(168)
Preferred dividends ($10,625 per share)					(24)			(24)		(24)
Other, net					(6)	(1)		(7)		(7)
Balance at Mar. 31, 2020		2,300	859	14,340	16,114	(19,918)	(1,497)	12,198	89	12,287
Balance at Dec. 31, 2019		2,300	859	14,323	16,408	(19,812)	(1,171)	12,907	90	12,997
Balance at Sep. 30, 2020		2,300	861	14,494	16,065	(19,926)	(1,134)	12,660	197	12,857
Balance at Mar. 31, 2020		2,300	859	14,340	16,114	(19,918)	(1,497)	12,198	89	12,287
Net (loss) income					(71)			(71)	6	(65)
Other comprehensive income (loss)							65	65		65
Shares issued to benefit plans and for option exercises			1	58				59		59
Common dividends					(171)			(171)		(171)
Preferred dividends ($10,625 per share)					(25)			(25)		(25)
Other, net						(6)		(6)	(11)	(17)
Balance at Jun. 30, 2020		2,300	860	14,398	15,847	(19,924)	(1,432)	12,049	84	12,133
Net (loss) income					427			427	5	432
Other comprehensive income (loss)							298	298	1	299
Shares issued to benefit plans and for option exercises			1	96				97		97
Common dividends					(171)			(171)		(171)
Preferred dividends ($10,625 per share)					(24)			(24)		(24)
Other, net	[2]				(14)	(2)		(16)	107	91
Balance at Sep. 30, 2020		$ 2,300	$ 861	$ 14,494	$ 16,065	$ (19,926)	$ (1,134)	$ 12,660	$ 197	$ 12,857

[1] Adjustments to beginning retained earnings include the effect of the accounting change were recorded upon adoption of the new standard for reclassification of stranded tax effects in accumulated other comprehensive income in the amount of $53 million, and a reduction of $186 million, net of tax, effect from an equity affiliate’s adoption of the new revenue standard.

[2] Non-controlling interests included $102 million related to the consolidation of Hemlock Semiconductor Group (“HSG”). Refer to Note 4 (HSG Transactions) to the consolidated financial statements for more information.