Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 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:

	Years Ended December 31
	2013		2012		2011
	(in millions except for per share amounts)
Basic earnings per share:
Net income	$	2,345	$	1,545	$	1,678
Weighted average shares outstanding		258.2		269.5		289.3
Basic earnings per share	$	9.08	$	5.73	$	5.80
Diluted earnings per share:
Net income	$	2,345	$	1,545	$	1,678
Weighted average shares outstanding		258.2		269.5		289.3
Additional shares from assumed issuance of shares under stock-based compensation awards		1.2		1.9		2.1
Weighted average shares and potential shares assumed outstanding for computing diluted earnings per share		259.4		271.4		291.4
Diluted earnings per share	$	9.04	$	5.69	$	5.76