Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Statements of Comprehensive Income [Abstract]
Net income attributable to Corning Incorporated	$ 337	$ 625	$ 928	$ 774
Foreign currency translation adjustments and other	(238)	(128)	(310)	(292)
Net unrealized (losses) gains on investments	(1)		1
Unamortized losses and prior service credits for postretirement benefit plans	4		(48)	(6)
Net unrealized (losses) gains on designated hedges	(22)	27	(20)	4
Other comprehensive loss, net of tax (Note 13)	(257)	(101)	(377)	(294)
Comprehensive income attributable to Corning Incorporated	$ 80	$ 524	$ 551	$ 480