Common and Preferred Shares and Warrants (Tables)

12 Months Ended

Dec. 31, 2011

Stockholders' Equity Note [Abstract]

Authorized shares and a reconciliation of common shares issued and outstanding

The following table shows authorized shares and provides a reconciliation of common shares issued and outstanding for the years ended December 31:

(Millions, except where indicated)		2011	2010	2009
Common shares authorized (billions)(a)		3.6	3.6	3.6
Shares issued and outstanding at beginning of
	year	1,197	1,192	1,160
(Repurchases) Issuances of common shares		(48)	(14)	22
Other, primarily stock option exercises
	and restricted stock awards granted	15	19	10
Shares issued and outstanding as of
	December 31	1,164	1,197	1,192

• Of the common shares authorized but unissued as of December 31, 2011, approximately90 million shares were reserved for issuance under employee stock and employee benefit plans