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
Mar. 31, 2012
Customer
Mar. 31, 2011
Customer
Dec. 31, 2011
Customer
Concentration Risk [Line Items]      
Total manufacturers produced 61.30% 64.00%  
Business and Credit Concentration (Textual) [Abstract]      
Domestic accounts receivable which do not require collateral from customers $ 120.0   $ 90.9
Foreign accounts receivable which are collateralized by letters of credit 128.8   105.5
Losses due to company's credit write-offs (0.3) 0.7  
Net assets held outside the United States $ 338.2   $ 325.3
Percentage of Net Sales to Five Largest Customers 17.80% 17.70%  
Number of customers accounting for more than 10% of sales 0 0  
Number of customers accounting for more than 10% of accounts receivable     2
Percentage of net trade receivables accounted for by one Major customer     12.50%
Percentage of net trade receivables accounted for by another Major customer     10.00%
Companies Top Five Manufacturers Produced [Member]
      
Concentration Risk [Line Items]      
Manufacturer #1 34.90% 30.00%  
Manufacturer #2 8.80% 11.50%  
Manufacturer #3 7.70% 10.30%  
Manufacturer #4 5.00% 6.30%  
Manufacturer #5 4.90% 5.90%