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Income Taxes (Details Textuals) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2010
Additional Income Taxes (Textuals) [Abstract]          
Additions for tax positions related to the current year     $ 1.8 $ 1.7  
Additions for tax positions of prior years     14.5 5.8  
Income Taxes (Textuals) [Abstract]          
Unrecognized tax benefits including interest and penalties that would affect the Company's effective tax rate if recognized 20.2 17.7 20.2 17.7  
Accrued interest and penalties 13.0   13.0   11.2
Change in income tax expense related to uncertain tax positions 0.9 1.2 1.8 2.3  
Mexico Settlement [Member]
         
Additional Income Taxes (Textuals) [Abstract]          
Excess of the amount reserved over the settlement amount       1.8  
Taxes, penalties, and interest paid       $ 2.1