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Debt and Credit Arrangements Debt Extinguishment (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2013
10.00% Senior Unsecured Notes due 2017
Dec. 31, 2013
10.00% Senior Unsecured Notes due 2017
Dec. 31, 2013
10.00% Senior Unsecured Notes due 2017
Extinguishment of Debt [Line Items]            
Loss on Extinguishment of Debt $ (45.2) $ 0 $ 0 $ 45.2    
Extinguishment of Debt, Amount           600.0
Write off of Unamortized Discount           7.3
Write off of Deferred Debt Issuance Cost         7.9  
Redemption Premium         30.0  
Early Repayment of Senior Debt           $ 630.0