Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2012

Preferred Stock [Abstract]

Summary Of Issued And Outstanding Preferred Stock

(in millions, except share amounts, redemption
price, and par value)	Shares Outstanding	Redemption Price		Balance
Nonredeemable $25 par value preferred stock
5.00% Series	400,000		N/A	$	10
5.50% Series	1,173,163		N/A		30
6.00% Series	4,211,662		N/A		105
Total nonredeemable preferred stock	5,784,825			$	145
Redeemable $25 par value preferred stock
4.36% Series	418,291	$	25.75	$	11
4.50% Series	611,142		26.00		15
4.80% Series	793,031		27.25		20
5.00% Series	1,778,172		26.75		44
5.00% Series A	934,322		26.75		23
Total redeemable preferred stock	4,534,958			$	113
Preferred stock				$	258