v2.4.0.6
Fair Values of Derivative Instruments Included on Consolidated Balance Sheet (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value $ 225.6 $ 193.2
Liability Derivatives Fair Value (15.6) (8.7)
Designated as Hedging Instrument
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 62.8 80.1
Liability Derivatives Fair Value (14.6) (4.9)
Designated as Hedging Instrument | Foreign currency | Prepaid expenses and other current assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 6.7 7.5
Designated as Hedging Instrument | Foreign currency | Miscellaneous other assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 0.7  
Designated as Hedging Instrument | Foreign currency | Accrued payroll and other liabilities
   
Derivatives, Fair Value [Line Items]    
Liability Derivatives Fair Value (0.3) (4.6)
Designated as Hedging Instrument | Foreign currency | Other long- term liabilities
   
Derivatives, Fair Value [Line Items]    
Liability Derivatives Fair Value (0.3)  
Designated as Hedging Instrument | Interest rate | Prepaid expenses and other current assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 9.4 0.5
Designated as Hedging Instrument | Interest rate | Miscellaneous other assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 46.0 72.1
Designated as Hedging Instrument | Interest rate | Other long- term liabilities
   
Derivatives, Fair Value [Line Items]    
Liability Derivatives Fair Value (14.0) (0.3)
Derivatives Not Designated as Hedging Instruments
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 162.8 113.1
Liability Derivatives Fair Value (1.0) (3.8)
Derivatives Not Designated as Hedging Instruments | Foreign currency | Prepaid expenses and other current assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value 8.3 6.0
Derivatives Not Designated as Hedging Instruments | Foreign currency | Miscellaneous other assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value   2.7
Derivatives Not Designated as Hedging Instruments | Foreign currency | Accrued payroll and other liabilities
   
Derivatives, Fair Value [Line Items]    
Liability Derivatives Fair Value (1.0) (3.8)
Derivatives Not Designated as Hedging Instruments | Equity | Prepaid expenses and other current assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value   104.4
Derivatives Not Designated as Hedging Instruments | Equity | Miscellaneous other assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives Fair Value $ 154.5