Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Operating Loss Carryforwards Expiring At A Future Time, Percentage	90.00%		90.00%
Operating Loss Carryforwards Expiring At A Future Time, Years	17 years		17 years
Valuation allowance charge	$ 33.1	$ 736.0	$ 769.1
Valuation allowance	$ 791.4		$ 791.4	$ 22.3