Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share (Tables) [Abstract]

Computation of basic and diluted earnings per share

	Periods Ended June 30
	Second Quarter				Six Months
	2011		2010		2011		2010
	(in millions,
	except for per share amounts)
Basic earnings per share:
Net income	$	419	$	518	$	928		$	982
Weighted average shares outstanding		293.6		324.5		296.0			328.7
Basic earnings per share	$	1.43	$	1.60	$	3.14		$	2.99
Diluted earnings per share:
Net income	$	419	$	518	$	928		$	982
Weighted average shares outstanding		293.6		324.5		296.0			328.7
Additional shares from assumed exercise of stock-based compensation awards		1.8		2.2		1.7			2.1
Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share		295.4		326.7		297.7			330.8
Diluted earnings per share	$	1.42	$	1.59	$	3.12		$	2.97