Earnings per Share (table)

12 Months Ended

Dec. 31, 2012

Earnings per Share disclosure

Earnings per share reconciliation [Table Text Block]

(for the year ended December 31, in millions, except per share amounts)	2012			2011			2010
Basic
Net income, as reported	$	2,473		$	1,426		$	3,216
Participating share-based awards—allocated income		(19	)		(11	)		(25	)
Preferred stock dividends		—			(1	)		(3	)
Net income available to common shareholders—basic	$	2,454		$	1,414		$	3,188
Diluted
Net income available to common shareholders	$	2,454		$	1,414		$	3,188
Effect of dilutive securities:
Participating share-based awards—re-allocated income		—			—			2
Convertible preferred stock		—			1			3
Net income available to common shareholders—diluted	$	2,454		$	1,415		$	3,193
Common Shares
Basic
Weighted average shares outstanding		386.2			415.8			476.5
Diluted
Weighted average shares outstanding		386.2			415.8			476.5
Weighted average effects of dilutive securities:
Stock options and performance shares		3.6			4.0			4.2
Convertible preferred stock		—			0.7			1.8
Total		389.8			420.5			482.5
Net income Per Common Share
Basic	$	6.35		$	3.40		$	6.69
Diluted	$	6.30		$	3.36		$	6.62