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Long-term Debt (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Notes and Loans Payable [Abstract]    
Notes Payable $ 7.9 $ 7.9
Other 0.3 0.4
Total 733.8 729.1
Less: current portion (6.6) (5.3)
Net long-term portion 719.3 715.9
Senior Secured Notes Maturing 2017 [Member]
   
Notes and Loans Payable [Abstract]    
Notes Payable 191.2 189.6
Chilian Term Credit Facility Maturing 2019 [Member]
   
Notes and Loans Payable [Abstract]    
Notes Payable 43.7 40.5
Brazilian Term Credit Facility Maturing 2017 [Member]
   
Notes and Loans Payable [Abstract]    
Notes Payable 10.0 10.0
Senior Notes Payable 2012 [Member]
   
Notes and Loans Payable [Abstract]    
Notes Payable 7.9 7.9
Senior Notes Payable 2013 Thru 2018 [Member]
   
Notes and Loans Payable [Abstract]    
Notes Payable 112.0 112.0
Non Recourse Notes Payable 2018 [Member]
   
Notes and Loans Payable [Abstract]    
Notes Payable 368.7 368.7
Recourse and non recourse [Member]
   
Notes and Loans Payable [Abstract]    
Less: current portion $ (14.5) $ (13.2)