Earnings per Common Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per common share

The computation of basic and diluted earnings per common share is presented in the following table.

($ in millions, except per share data)	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Numerator:
Net income	$	666	$	520	$	1,940	$	1,037
Less: Preferred stock dividends	29		29		87		87
Net income applicable to common shareholders(1)	$	637	$	491	$	1,853	$	950
Denominator:
Weighted average common shares outstanding	361.3		371.5		363.5		374.4
Effect of dilutive potential common shares:
Stock options	4.4		3.2		4.3		3.3
Restricted stock units (non-participating) and performance stock awards	1.4		1.2		1.3		1.2
Weighted average common and dilutive potential common shares outstanding	367.1		375.9		369.1		378.9
Earnings per common share - Basic	$	1.76	$	1.32	$	5.10	$	2.54
Earnings per common share - Diluted	$	1.74	$	1.31	$	5.02	$	2.51

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