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Fair Value Measurements (Carrying Amounts And Fair Values Of Financial Instruments) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Available-for-sale securities, financial assets $ 385.2 $ 329.5
Currency swap agreement, financial assets 0.1  
Currency swap agreement, liabilities   24.9
Reported Value Measurement [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Available-for-sale securities, financial assets 385.2 329.5
Currency swap agreement, financial assets 0.1  
Short-term borrowings, liabilities 62.3 55.5
Long-term borrowings, liabilities 3,436.7 5,287.6
Currency swap agreement, liabilities   24.9
Estimate of Fair Value Measurement [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Available-for-sale securities, financial assets 385.2 329.5
Currency swap agreement, financial assets 0.1  
Short-term borrowings, liabilities 62.3 55.5
Long-term borrowings, liabilities 3,877.6 5,917.3
Currency swap agreement, liabilities   $ 24.9