Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table shows our computation of basic and diluted earnings per share:

	Year Ended December 31,
(in millions, except per share data)	2012		2011		2010
Net income	$	1,009	$	854	$	593
Basic weighted average shares outstanding	845		838		834
Dilutive effects of share based awards	5		6		9
Diluted weighted average shares outstanding	850		844		843
Basic earnings per share	$	1.20	$	1.02	$	0.71
Diluted earnings per share	$	1.19	$	1.01	$	0.70
Antidilutive common stock equivalents excluded from diluted earnings per share	18		17		22