Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Consolidated Statements of Comprehensive (Loss) Income [Abstract]
Net (loss) income attributable to Corning Incorporated	$ (96)	$ 499
Foreign currency translation adjustments and other	(265)	(110)
Net unrealized gains on investments		1
Unamortized losses and prior service costs for postretirement benefit plans		(52)
Net unrealized (losses) gains on designated hedges	(61)	5
Other comprehensive loss, net of tax (Note 12)	(326)	(156)
Comprehensive (loss) income attributable to Corning Incorporated	$ (422)	$ 343