Quarterly report pursuant to Section 13 or 15(d)

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

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Goodwill And Other Intangible Assets And Liabilities (Narrative) (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Amortization expense relating to intangible assets $ 4.5 $ 4.7 $ 9.3 $ 9.6
Product 1,546.6 1,705.0 2,747.5 2,838.0
Lower Limit [Member]
       
Below-market sales contracts 2   2  
Upper Limit [Member]
       
Below-market sales contracts 5   5  
Below Market Sales Contracts [Member]
       
Product $ 14.7 $ 16.6 $ 16.6 $ 23.7