Earnings per common share (Tables)

6 Months Ended

Jun. 30, 2013

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,
		2013		2012		2013		2012
Numerator:
Net income	$	434	$	423	$	1,143	$	1,189
Less: Preferred stock dividends		--		--		--		--
Net income available to common shareholders	$	434	$	423	$	1,143	$	1,189
Denominator:
Weighted average common shares outstanding		468.3		490.6		471.9		494.9
Effect of dilutive potential common shares:
Stock options		3.9		2.3		3.8		2.2
Restricted stock units and performance stock awards (non-participating)		1.6		0.9		1.6		0.8
Weighted average common and dilutive potential common shares outstanding		473.8		493.8		477.3		497.9
Earnings per common share - Basic	$	0.93	$	0.86	$	2.42	$	2.40
Earnings per common share - Diluted	$	0.92	$	0.86	$	2.39	$	2.39