Earnings per Common Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

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)	2018		2017		2016
Net income from continuing operations	$	1,263	$	926	$	1,111
Preferred stock dividends	—		—		(30		)
Net income from continuing operations attributable to common stockholders	1,263		926		1,081
Income (loss) from discontinued operations, net of tax	—		3		(44		)
Net income attributable to common stockholders	$	1,263	$	929	$	1,037
Basic weighted-average common shares outstanding (b)	425,165		453,704		481,105
Diluted weighted-average common shares outstanding (b)	427,680		455,350		482,182
Basic earnings per common share
Net income from continuing operations	$	2.97	$	2.04	$	2.25
Income (loss) from discontinued operations, net of tax	—		0.01		(0.09		)
Net income	$	2.97	$	2.05	$	2.15
Diluted earnings per common share
Net income from continuing operations	$	2.95	$	2.03	$	2.24
Income (loss) from discontinued operations, net of tax	—		0.01		(0.09		)
Net income	$	2.95	$	2.04	$	2.15

(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.