Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Consolidated Statements of Comprehensive (Loss) Income [Abstract]
Net (loss) income attributable to Corning Incorporated	$ (71)	$ 92	$ (167)	$ 591
Foreign currency translation adjustments and other	58	38	(207)	(72)
Net unrealized gains on investments		1		2
Unamortized losses and prior service costs for postretirement benefit plans	(12)		(12)	(52)
Net unrealized gains (losses) on designated hedges	19	(3)	(42)	2
Other comprehensive income (loss), net of tax (Note 14)	65	36	(261)	(120)
Comprehensive (loss) income attributable to Corning Incorporated	$ (6)	$ 128	$ (428)	$ 471