Quarterly report pursuant to Section 13 or 15(d)

Business and Credit Concentrations (Details)

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Business and Credit Concentrations (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Concentration Risk [Line Items]          
Total Manufacturers Produced 58.70% 72.60% 62.50% 71.30%  
Business and Credit Concentration (Textual) [Abstract]          
Domestic accounts receivable which do not require collateral from customers $ 115.6   $ 115.6   $ 164.4
Foreign accounts receivable which are collateralized by letters of credit 150.1   150.1   121.4
Losses due to company's credit write-offs 0.3 2.2 2.8 3.8  
Net assets held outside the United States $ 325.3   $ 325.3   $ 322.0
Company's net sales to its five largest customers 17.40% 26.00% 18.80% 27.20%  
Number of customers accounting for more than 10% of sales 0 0 0 0  
Number of customers accounting for more than 10% of accounts receivable 0   0   0
Companies Top Five Manufacturers Produced
          
Concentration Risk [Line Items]          
Manufacturer #1 24.50% 36.30% 29.50% 35.40%  
Manufacturer #2 12.60% 12.20% 11.60% 12.80%  
Manufacturer #3 9.00% 9.50% 8.10% 9.40%  
Manufacturer #4 6.30% 8.60% 6.90% 9.00%  
Manufacturer #5 6.30% 6.00% 6.40% 4.70%