Annual report pursuant to Section 13 and 15(d)

Lease Obligations (Details 1)

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Lease Obligations (Details 1) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Capital leases included in property, plant and equipment on the accompanying consolidated balance sheet      
Equipment $ 10.6 $ 10.7  
Less: accumulated depreciation (9.7) (8.8)  
Total 0.9 1.9  
Lease Obligations (Textual) [Abstract]      
Rental expense $ 49.2 $ 43.5 $ 39.7