Equity (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Apr. 19, 2013
Debt Instrument [Line Items]
Common Stock, Capital Shares Reserved For Future Issuance	99,000,000
Stock Issued During Period, Shares, Dividend Reinvestment Plan	293,552		368,982		422,642
Stock Repurchase Program, Number Of Shares Authorized To Be Repurchased	25,000,000
Stock Repurchase Program, Remaining Number Of Shares Authorized To Be Repurchased	8,086,000
Shares Repurchased Under Stock Repurchse Program	13,500,000				3,200,000
Preferred stock issued, value	$ 0	[1]	$ 0	[1]
Preferred stock redemption, value			150,000,000
Redemption Of Noncontrolling Interests			$ 375,000,000		$ 500,000,000
Series L Preferred Stock [Member]
Debt Instrument [Line Items]
Preferred Stock Dividend Rate Percentage					9.875%
Debt Instrument, Basis Spread on Variable Rate - LIBOR Plus			6.33%
Depositary Shares						6,000,000
Preferred stock redemption, shares			1,500
Series M Preferred Stock [Member]
Debt Instrument [Line Items]
Preferred stock issuance, shares					5,001
TARP Warrant [Member]
Debt Instrument [Line Items]
Number of warrants or rights outstanding	16,885,192
Exercise price per share of warrants or rights outstanding	$ 67.33

[1] Par value less than $.5 million at each date.