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Fair Value Of Financial Instruments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Fair Value, Option, Quantitative Disclosures [Line Items]      
Foreign currency forward contracts, notional value $ 148.7 $ 375.4  
Other Accounts Receivable [Member]
     
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair value foreign currency forward contracts, assets   0.5  
Accrued Expenses [Member]
     
Fair Value, Option, Quantitative Disclosures [Line Items]      
Fair value foreign currency forward contracts, liabilities 0.9 5.4  
Other (Expenses) Income [Member]
     
Fair Value, Option, Quantitative Disclosures [Line Items]      
Recognized gains (losses) of foreign currency forward contracts 1.0 (6.5) 0.6
Other, Net [Member]
     
Fair Value, Option, Quantitative Disclosures [Line Items]      
Change in the fair value of foreign currency forward contracts (1.0) 6.5  
Cash settlements $ (3.0) $ (1.3)  
4.50% Senior Notes [Member]
     
Fair Value, Option, Quantitative Disclosures [Line Items]      
Debt instrument, interest rate 4.50% 4.50%  
5.10% Senior Notes [Member]
     
Fair Value, Option, Quantitative Disclosures [Line Items]      
Debt instrument, interest rate 5.10% 5.10%