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Schedule II - Valuation and Qualifying Accounts (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Valuation and Qualifying Accounts Disclosure [Line Items]        
Allowance for Doubtful Accounts Receivable, Current $ 5.5 $ 6.2    
Valuation Allowance, Amount 426.9 560.9    
Inventory Valuation Reserves 26.7 27.7    
Allowance for Doubtful Accounts [Member]
        
Valuation and Qualifying Accounts Disclosure [Line Items]        
Allowance for Doubtful Accounts Receivable, Current 5.5 6.2 8.3 3.3
Valuation Allowances and Reserves, Charged to Cost and Expense 3.3 3.1 8.2  
Valuation Allowances and Reserves, Deductions 4.0 5.2 3.2  
Valuation Allowance of Deferred Tax Assets [Member]
        
Valuation and Qualifying Accounts Disclosure [Line Items]        
Valuation Allowance, Amount 426.9 560.9 559.7 581.8
Valuation Allowances and Reserves, Charged to Cost and Expense 14.6 50.9 268.3  
Valuation Allowances and Reserves, Deductions 148.6 49.7 290.4  
Inventory Valuation Reserve [Member]
        
Valuation and Qualifying Accounts Disclosure [Line Items]        
Inventory Valuation Reserves 26.7 27.7 33.7 28.3
Valuation Allowances and Reserves, Charged to Cost and Expense 6.3 7.7 17.3  
Valuation Allowances and Reserves, Deductions $ 7.3 $ 13.7 $ 11.9