Earnings per share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings per share [Abstract]

Computation for basic and diluted earnings per share

	Three months ended March 31,
	2012		2011
Income (Numerator):
Net income for basic and diluted EPS	$	1,184	$	1,125
Shares (Denominator):
Weighted-average shares for basic EPS		791		933
Effect of dilutive securities		9		8
Weighted-average shares for diluted EPS		800		941
Basic EPS	$	1.50	$	1.21
Diluted EPS	$	1.48	$	1.20