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Income Taxes (Narrative) (Details) (USD $)
In Millions, except Per Share data
3 Months Ended9 Months Ended
Sep. 30, 2011
Mar. 31, 2011
Sep. 30, 2011
Sep. 30, 2010
Income Taxes [Line Items]    
Discrete tax benefit  $ 0.6 
Increase Decrease in valuation allowances on deferred tax assets 16.3  
Additional reserve for uncertain tax benefits7.1 7.1 
Net decrease in valuation allowance recorded as tax benefit16.3   
Tax incentive  9.96.7
Net impact of holiday tax incentives, per diluted share  $ 0.16$ 0.11
Interest on unrecognized tax reserve1.8 1.8 
Penalty on unrecognized tax reserve1.6 1.6 
Unrecognized tax reserve25.3 25.3 
Tax refund8.3 8.3 
U.S. [Member]
    
Income Taxes [Line Items]    
Increase Decrease in valuation allowances on deferred tax assets  17.5 
Foreign Jurisdictions [Member]
    
Income Taxes [Line Items]    
Increase Decrease in valuation allowances on deferred tax assets  $ 1.2