Earnings per Common Share (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2017		2016
Numerator:
Net income	$	695	$	246
Less: Preferred stock dividends	29		29
Net income applicable to common shareholders(1)	$	666	$	217
Denominator:
Weighted average common shares outstanding	365.7		378.1
Effect of dilutive potential common shares:
Stock options	4.2		3.4
Restricted stock units (non-participating) and performance stock awards	1.4		1.4
Weighted average common and dilutive potential common shares outstanding	371.3		382.9
Earnings per common share - Basic	$	1.82	$	0.57
Earnings per common share - Diluted	$	1.79	$	0.57

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