Earnings per Share

12 Months Ended

Dec. 31, 2012

Earnings per Share disclosure

Earnings per Share disclosure [Text Block]

11. EARNINGS PER SHARE

        Basic earnings per share was computed by dividing income available to common shareholders by the weighted average number of common shares outstanding during the period. The computation of diluted earnings per share reflected the effect of potentially dilutive securities.

        The following is a reconciliation of the income and share data used in the basic and diluted earnings per share computations:

(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