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Income Taxes (Details 3) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Valuation allowance      
Valuation allowance $ 9.1 $ 9.1  
Income taxes, additional disclosures      
Undistributed earnings of the Company's foreign subsidiaries 282.2 313.0 320.3
Withholding taxes payable upon remittance of all previously unremitted earnings 7.8    
U.S.
     
Valuation allowance      
Valuation allowance $ 9.1