Earnings Per Common Share

12 Months Ended

Dec. 31, 2012

Earnings Per Common Share [Abstract]

Earnings Per Common Share

18.      Earnings Per Common Share

Basic earnings per common share are computed by dividing income attributable to common shareholders by the weighted-average number of common shares outstanding for the period.  Diluted earnings per common share assumes the issuance of common shares for all potentially dilutive securities outstanding.

The reconciliation of the amounts used to compute basic and diluted earnings per common share from continuing operations follows (in millions, except per share amounts):

	Years ended December 31,
	2012			2011			2010
	Net income attributable to Corning Incorporated	Weighted- average shares	Per share amount	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	$1,728	1,494	$1.16	$2,805	1,562	$1.80	$3,558	1,558	$2.28
Effect of dilutive securities:
Employee stock options and awards		12			21			23
Diluted earnings per common share	$1,728	1,506	$1.15	$2,805	1,583	$1.77	$3,558	1,581	$2.25

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):

	Years ended December 31,
	2012	2011	2010
Potential common shares excluded from the calculation of diluted earnings per share:
Employee stock options and awards	43	29	43
Total	43	29	43