Quarterly report pursuant to Section 13 or 15(d)

Goodwill And Other Intangible Assets And Liabilities (Narrative) (Details)

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Goodwill And Other Intangible Assets And Liabilities (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Amortization expense relating to intangible assets $ 4.8 $ 4.7
Product 1,200.9 1,133.0
Lower Limit [Member]
   
Below-market sales contracts life (in years) 2.0  
Upper Limit [Member]
   
Below-market sales contracts life (in years) 5.0  
Below Market Sales Contracts [Member]
   
Product $ 1.9 $ 7.1