Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidated Statements of Comprehensive Income [Abstract]
Net income (loss) attributable to Corning Incorporated	$ 960	$ 1,066	$ (497)
Foreign currency translation adjustments and other	(143)	(185)	746
Net unrealized gains (losses) on investments	1	(1)	14
Unamortized (losses) gains and prior service (costs) credits for postretirement benefit plans	(64)	19	30
Net unrealized gains (losses) on designated hedges	45	(1)	44
Other comprehensive (loss) income, net of tax (Note 16)	(161)	(168)	834
Comprehensive income attributable to Corning Incorporated	$ 799	$ 898	$ 337