Common and Preferred Shares and Warrants (Tables)

12 Months Ended

Dec. 31, 2012

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)		2012	2011	2010
Common shares authorized (billions)(a)		3.6	3.6	3.6
Shares issued and outstanding at beginning of
	year	1,164	1,197	1,192
Repurchases of common shares		(69)	(48)	(14)
Other, primarily stock option exercises
	and restricted stock awards granted	10	15	19
Shares issued and outstanding as of
	December 31	1,105	1,164	1,197

• Of the common shares authorized but unissued as of December 31, 2012, approximately80 million shares are reserved for issuance under employee stock and employee benefit plans.