Equity Equity, Textuals (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended			9 Months Ended
	May 09, 2012	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Dividends declared per share	$ 0.06		$ 0	$ 0.05	$ 0	$ 0
Dividends, Common Stock, Cash					$ 12.8
Treasury Stock, Shares, Acquired		1,416,937			12,226,905
Treasury Stock, Value, Acquired, Par Value Method		19.4			142.7
Treasury Stock Acquired, Average Cost Per Share		$ 13.68			$ 11.67
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 57.9			$ 77.3