Earnings (Loss) Per Common Share

12 Months Ended

Dec. 31, 2019

Earnings (Loss) Per Common Share [Abstract]

Earnings (Loss) Per Common Share

17.Earnings (Loss) Per Common Share

Basic earnings (loss) 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 (loss) 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 (loss) per common share from operations is as follows (in millions, except per share amounts):

	Years ended December 31,
	2019		2018		2017
Net income (loss) attributable to Corning Incorporated	$	960	$	1,066	$	(497)
Less: Series A convertible preferred stock dividend		98		98		98
Net income (loss) available to common stockholders - basic		862		968		(595)
Plus: Series A convertible preferred stock dividend		98		98
Net income (loss) available to common stockholders - diluted	$	960	$	1,066	$	(595)
Weighted-average common shares outstanding - basic		776		816		895
Effect of dilutive securities:
Stock options and other dilutive securities		8		10
Series A convertible preferred stock (1)		115		115
Weighted-average common shares outstanding - diluted		899		941		895
Basic earnings (loss) per common share	$	1.11	$	1.19	$	(0.66)
Diluted earnings (loss) per common share	$	1.07	$	1.13	$	(0.66)
Anti-dilutive potential shares excluded from diluted ‎  earnings (loss) per common share:
Series A convertible preferred stock dividend (1)						115
Employee stock options and awards		2		2		13
Total		2		2		128

(1)For the year ended December 31, 2017, the Series A preferred stock was anti-dilutive and therefore excluded from the calculation of diluted earnings (loss) per share.