Earnings Per Common Share

9 Months Ended

Sep. 30, 2012

Earnings Per Common Share [Abstract]

Earnings Per Common Share

5.      Earnings per Common Share

The reconciliation of the amounts used in the basic and diluted earnings per common share computations follows (in millions, except per share amounts):

	Three months ended September 30,
	2012			2011
	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount
Basic earnings per common share	$521	1,483	$0.35	$811	1,569	$0.52
Effect of dilutive securities:
Stock options and other dilutive securities		11			19
Diluted earnings per common share	$521	1,494	$0.35	$811	1,588	$0.51

	Nine months ended September 30,
	2012			2011
	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount
Basic earnings per common share	$1,445	1,502	$0.96	$2,314	1,567	$1.48
Effect of dilutive securities:
Stock options and other dilutive securities		12			22
Diluted earnings per common share	$1,445	1,514	$0.95	$2,314	1,589	$1.46

The following potential common shares were excluded from the calculation of diluted earnings per common share because their inclusion would have been anti-dilutive (in millions):

	Three months ended September 30,		Nine months ended September 30,
	2012	2011	2012	2011
Stock options and other dilutive securities excluded from the calculation of diluted earnings per common share	44	34	43	81