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Lease Obligations (Schedule of Capital Leased Assets) (Details) (Machinery and equipment [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Machinery and equipment [Member]
   
Capital Leased Assets [Line Items]    
Presses and equipment—leased $ 85.1 $ 85.6
Less—accumulated depreciation (54.4) (45.2)
Net presses and equipment—leased $ 30.7 $ 40.4