Earnings per Common Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per common share

Computation of basic and diluted earnings per common share
($ in millions, except per share data)	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Numerator:
Net income	$	676	$	579	$	1,651	$	1,274
Less: Preferred stock dividends	39		29		68		58
Net income applicable to common shareholders (1)	$	637	$	550	$	1,583	$	1,216
Denominator:
Weighted average common shares outstanding	349.2		363.6		351.6		364.6
Effect of dilutive potential common shares:
Stock options	3.8		4.3		3.9		4.2
Restricted stock units (non-participating) and performance stock awards	1.6		1.1		1.7		1.3
Weighted average common and dilutive potential common shares outstanding	354.6		369.0		357.2		370.1
Earnings per common share - Basic	$	1.82	$	1.51	$	4.50	$	3.34
Earnings per common share - Diluted	$	1.80	$	1.49	$	4.43	$	3.29

⁽¹⁾  Net income applicable to common shareholders is net income less preferred stock dividends.