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 6 Months Ended
Jun. 30, 2012
Customer
Jun. 30, 2011
Customer
Jun. 30, 2012
Customer
Jun. 30, 2011
Customer
Dec. 31, 2011
Customer
Concentration Risk [Line Items]          
Total Manufacturers Produced 64.60% 63.60% 62.50% 63.80%  
Business and Credit Concentration (Textual) [Abstract]          
Domestic accounts receivable which do not require collateral from customers $ 143.3   $ 143.3   $ 90.9
Foreign accounts receivable which are collateralized by letters of credit 94.4   94.4   105.5
Losses due to company's credit write-offs 1.5 1.8 1.2 2.5  
Net assets held outside the United States $ 338.4   $ 338.4   $ 325.3
Percentage of Net Sales to Five Largest Customers 23.00% 25.20% 20.40% 20.10%  
Number of customers accounting for more than 10% of sales 0 0 0 0  
Number of customer accounting for more than 12.5% of Accounts receivable         1
Number of customers accounting for more than 10% of accounts receivable 0   0   1
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 34.60% 31.70% 34.70% 30.80%  
Manufacturer #2 9.30% 11.20% 9.10% 11.40%  
Manufacturer #3 8.00% 7.60% 6.70% 8.60%  
Manufacturer #4 6.40% 6.80% 6.40% 6.70%  
Manufacturer #5 6.30% 6.30% 5.60% 6.30%