Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:

	Periods Ended June 30
	Second Quarter				Six Months
	2013		2012		2013		2012
	(in millions, except for per share amounts)
Basic earnings per share:
Net income	$	579	$	404	$	1,235	$	910
Weighted average shares outstanding		260.5		271.5		261.9		272.9
Basic earnings per share	$	2.22	$	1.49	$	4.72	$	3.33
Diluted earnings per share:
Net income	$	579	$	404	$	1,235	$	910
Weighted average shares outstanding		260.5		271.5		261.9		272.9
Additional shares from assumed issuance of shares under stock- based compensation awards		1.0		1.8		1.3		1.9
Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share		261.5		273.3		263.2		274.8
Diluted earnings per share	$	2.21	$	1.48	$	4.69	$	3.31