Preferred Securities (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Oct. 08, 2003	Sep. 30, 2010	Dec. 31, 2010	Jul. 30, 2010	Oct. 07, 2003
Temporary Equity [Abstract]
Preferred Stock Depository Shares					9,200,000
Depository Shares Fraction Interest	1/10th
Auction Market Preferred Securities, Dividend Arrearages, Per Share					$ 25
Preferred Stock, Value, Issued					$ 230
Preferred Stock, Shares Issued				460,000
stock repurchased and retired during period per share				$ 25
Stock Repurchased and Retired During Period, Value		115,000,000
Preferred Stock Redemption Premium			$ 3,000,000