v2.4.0.6
Financial Instruments and Hedging Activities - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Fixed-rate debt converted to floating-rate debt from the use of interest rate exchange agreements $ 2,300   $ 2,300  
Net increase (decrease) after-tax related to the cash flow hedges component of accumulated OCI in shareholders' equity 11.5 (0.5) 8.0 (4.0)
Cumulative deferred hedging gains, after tax, included in accumulated other comprehensive income 12.6   12.6  
Foreign currency denominated debt designated to hedge investments in certain foreign subsidiaries and affiliates 4,400   4,400  
Foreign currency derivatives designated to hedge investments in certain foreign subsidiaries and affiliates 507.0   507.0  
Derivatives in Cash Flow Hedging Relationships
        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Net increase (decrease) after-tax related to the cash flow hedges component of accumulated OCI in shareholders' equity     8.0 (4.0)
Foreign currency denominated royalties
        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Notional amount of derivatives 386.1   386.1  
Period covered by hedge     18 months  
Cross Currency Swap
        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Notional amount of derivatives 193.6   193.6  
Period covered by hedge     57 months  
Commodity Forward
        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Notional amount of derivatives 477.4   477.4  
Period covered by hedge     22 years  
Interest Rate Swap
        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Anticipated debt issuance converted to fixed rate by the use of interest rate swaps $ 0   $ 0