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Income Taxes (Details Textual) (USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Additional Income Taxes (Textual) [Abstract]     
Additions for tax positions related to the current year  $ 2.9$ 2.6 
Additions for tax positions of prior years  15.16.0 
Income Taxes (Textual) [Abstract]     
Unrecognized tax benefits including interest and penalties that would affect the Company's effective tax rate if recognized18.814.918.814.9 
Accrued interest and penalties12.8 12.8 11.2
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total(0.3)(3.2)1.5(5.5) 
Swiss Subsidiary [Member]
     
Additional Income Taxes (Textual) [Abstract]     
Payment of taxes and interest  2.8  
Tax refunds from tax authorities  $ 1.8