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 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Amortization expense relating to intangible assets $ 4.8 $ 3.3 $ 14.1 $ 12.5
Product 1,447.9 2,070.7 4,096.6 4,790.8
Minimum [Member]
       
Below-market sales contracts 2 years   2 years  
Maximum [Member]
       
Below-market sales contracts 5 years   5 years  
Sales Revenue, Goods, Net [Member] | Sales Revenue, Goods, Net [Member]
       
Product $ 14.7 $ 16.7 $ 31.3 $ 40.4