Earnings per share (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Computation for basic and diluted earnings per share

The computation for basic and diluted EPS was as follows (in millions, except per-share data):

	Three months ended				Nine months ended
	September 30,				September 30,
	2012		2011		2012		2011
Income (Numerator):
Net income for basic and diluted EPS	$	1,107	$	454	$	3,557	$	2,749
Shares (Denominator):
Weighted-average shares for basic EPS	771		907		779		922
Effect of dilutive securities	12		7		10		8
Weighted-average shares for diluted EPS	783		914		789		930
Basic EPS	$	1.44	$	0.50	$	4.57	$	2.98
Diluted EPS	$	1.41	$	0.50	$	4.51	$	2.96