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Long-Term Debt Senior Secured Notes (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Debt Instrument [Line Items]    
Debt, long-term and short-term $ 3,766.0  
Senior secured notes due 2018 [Member]
   
Debt Instrument [Line Items]    
Long-term debt, stated interest rate 8.00%  
Debt, long-term and short-term $ 500.0 $ 500.0