Condensed Consolidated Statements of Changes in Equity (Unaudited) (Parentheticals) (Parent [Member], USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Dividends, per common share (in Dollars per share)	$ 0.57	$ 0.54
Series F Preferred Stock [Member]
Dividends, per Depositary share (in Dollars per share)	$ 1.0344	$ 1.2468
Series G Preferred Stock [Member]
Dividends, per Depositary share (in Dollars per share)	$ 1.4532	$ 1.4532
Series H Preferred Stock [Member]
Dividends, per Depositary share (in Dollars per share)	$ 1.2989	$ 1.2989
Series I Preferred Stock [Member]
Dividends, per Depositary share (in Dollars per share)	$ 0.79583
Series J Preferred Stock [Member]
Dividends, per Depositary share (in Dollars per share)	$ 0.2521