Annual report pursuant to Section 13 and 15(d)

Income Taxes, Valuation Allowances and NOL Carryforwards (Details)

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Income Taxes, Valuation Allowances and NOL Carryforwards (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Operating Loss Carryforwards [Line Items]    
Total valuation allowance $ 717.5  
Current valuation allowance 130.1 135.8
Non-current valuation allowance 587.4 592.6
Decrease in valuation allowance 10.9  
Tax benefit of loss carryovers 107.9  
Tax benefit of unused capital losses 18.2  
NOL carryforwards which expire 72.5  
NOL carryforwards which have an unlimited life 17.2  
Foreign Country [Member]
   
Operating Loss Carryforwards [Line Items]    
Tax benefit of loss carryovers 20.1  
State and Local Jurisdiction [Member]
   
Operating Loss Carryforwards [Line Items]    
Tax benefit of loss carryovers $ 69.6