Earnings per Common Share

12 Months Ended

Dec. 31, 2020

Earnings per Common Share

The following table presents the calculation of basic and diluted earnings per common share.



Year ended December 31, ($ in millions, except per share data; shares in thousands) (a)	2020		2019		2018
Net income from continuing operations	$	1,086	$	1,721	$	1,263
Loss from discontinued operations, net of tax	(1)		(6)		—
Net income attributable to common stockholders	$	1,085	$	1,715	$	1,263
Basic weighted-average common shares outstanding (b)	375,629		393,234		425,165
Diluted weighted-average common shares outstanding (b) (c)	377,101		395,395		427,680
Basic earnings per common share
Net income from continuing operations	$	2.89	$	4.38	$	2.97
Loss from discontinued operations, net of tax	—		(0.02)		—
Net income	2.89		4.36		2.97
Diluted earnings per common share
Net income from continuing operations	2.88		4.35		2.95
Loss from discontinued operations, net of tax	—		(0.02)		—
Net income	$	2.88	$	4.34	$	2.95

(a)Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.

(b)Includes shares related to share-based compensation that vested but were not yet issued.

(c)During the year ended December 31, 2020, there were 0.8 million in shares underlying share-based awards excluded because their inclusion would have been antidilutive. There were no antidilutive shares during the years ended December 31, 2019, and 2018.