Earnings Per Common Share

Basic and diluted earnings per common share were calculated as follows:



	Three Months Ended September 30,					Nine Months Ended September 30,
	2018			2017		2018		2017
	(Dollars in millions, except per share amounts, shares in thousands)
Income (Numerator):
Net income	$	272		92		679		272
Earnings applicable to non-vested restricted stock	—			—		—		—
Net income applicable to common stock for computing basic earnings per common share	272			92		679		272
Net income as adjusted for purposes of computing diluted earnings per common share	$	272		92		679		272
Shares (Denominator):
Weighted-average number of shares:
Outstanding during period	1,080,589			549,618		1,077,712		548,779
Non-vested restricted stock	(13,685		)	(8,097	)	(12,302	)	(7,666	)
Weighted-average shares outstanding for computing basic earnings per common share	1,066,904			541,521		1,065,410		541,113
Incremental common shares attributable to dilutive securities:
Shares issuable under convertible securities	10			10		10		10
Shares issuable under incentive compensation plans	5,437			432		4,306		756
Number of shares as adjusted for purposes of computing diluted earnings per common share	1,072,351			541,963		1,069,726		541,879
Basic earnings per common share	$	0.25		0.17		0.64		0.50
Diluted earnings per common share	$	0.25		0.17		0.63		0.50

Our calculation of diluted earnings per common share excludes shares of common stock that are issuable upon exercise of stock options when the exercise price is greater than the average market price of our common stock. We also exclude unvested restricted stock awards that are anti-dilutive as a result of unrecognized compensation cost. Such shares averaged 1.5 million and 5.1 million for the three months ended September 30, 2018 and 2017, respectively, and averaged 3.0 million and 4.2 million for the nine months ended September 30, 2018 and 2017, respectively.