Earnings per share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings per share [Abstract]

Computation for basic and diluted earnings per share

	Three months ended				Six months ended
	June 30,				June 30,
	2011		2010		2011		2010
Income (Numerator):
Net income for basic and diluted EPS	$	1,170	$	1,202	$	2,295	$	2,369
Shares (Denominator):
Weighted-average shares for basic EPS		927		959		930		970
Effect of dilutive securities		8		5		8		6
Weighted-average shares for diluted EPS		935		964		938		976
Basic EPS	$	1.26	$	1.25	$	2.47	$	2.44
Diluted EPS	$	1.25	$	1.25	$	2.45	$	2.43