Comprehensive Income (Components Of Comprehensive Income, Net Of Tax) (Details) (USD $) In Millions	1 Months Ended	3 Months Ended				9 Months Ended
	Feb. 28, 2010	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Comprehensive Income
Net income		$ 811		$ 785		$ 2,312		$ 2,512
Net change in unrealized (loss) gain on investment securities		(11)	[1]	2	[1]	(1)	[1]	7	[1]
Net change in unrealized (loss) gain on derivative hedging instruments		(4)	[1]	(16)	[1]	4	[1]	(25)	[1]
Foreign currency translation adjustment	140	(377)	[1]	688	[1]	(12)	[1]	469	[1]
Amortization of postretirement benefit plan losses and prior service costs		21	[1]	14	[1]	59	[1]	32	[1]
Comprehensive income		440		1,473		2,362		2,995
Comprehensive income attributable to noncontrolling interests						2		2
Comprehensive income attributable to Corning		440		1,473		2,364		2,997
Other comprehensive income net tax effects		$ 6		$ (1)		$ (36)		$ (16)

[1] Other comprehensive income items for the three months ended September 30, 2011 and 2010 include net tax effects of $(6) million and $(1) million, respectively, and for the nine months ended September 30, 2011 and 2010 include net tax effects of $(36) million and $(16) million, respectively.