Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Computation of Basic and Diluted Earnings Per Share

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

	Years Ended December 31
	2012		2011		2010
	(in millions except for per share amounts)
Basic earnings per share:
Net income	$	1,545	$	1,678	$	2,174
Weighted average shares outstanding		269.5		289.3		319.2
Basic earnings per share	$	5.73	$	5.80	$	6.81
Diluted earnings per share:
Net income	$	1,545	$	1,678	$	2,174
Weighted average shares outstanding		269.5		289.3		319.2
Additional shares from assumed issuance of shares under stock-based compensation awards		1.9		2.1		2.4
Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share		271.4		291.4		321.6
Diluted earnings per share	$	5.69	$	5.76	$	6.76