Comprehensive Income (Components Of Comprehensive Income, Net Of Tax) (Details) (USD $) In Millions	1 Months Ended	3 Months Ended				6 Months Ended
	Feb. 28, 2010	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Comprehensive Income
Net income		$ 755		$ 912		$ 1,502		$ 1,727
Net change in unrealized (loss) gain on investments securities		(2)	[1]	(6)	[1]	10	[1]	5	[1]
Net change in unrealized (loss) gain on derivative hedging instruments				(11)	[1]	8	[1]	(9)	[1]
Foreign currency translation adjustment	140	226	[1]	(197)	[1]	365	[1]	(219)	[1]
Amortization of postretirement benefit plan losses and prior service costs		17	[1]	27	[1]	38	[1]	18	[1]
Comprehensive income		996		725		1,923		1,522
Comprehensive loss (income) attributable to noncontrolling interests				1		1		2
Comprehensive income attributable to Corning		996		726		1,924		1,524
Other comprehensive income net tax effects		$ 16		$ (10)		$ (30)		$ 15

[1] Other comprehensive income items for the three months ended June 30, 2011 and 2010 include net tax effects of $(16) million and $(10) million, respectively, and for the six months ended June 30, 2011 and 2010 net tax effects of $(30) million and $(15) million, respectively.