Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments And Hedging Activities (Schedule Of Derivatives Not Designated As Hedging Instruments Statements Of Financial Performance Location Table) (Detail)

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Derivative Instruments And Hedging Activities (Schedule Of Derivatives Not Designated As Hedging Instruments Statements Of Financial Performance Location Table) (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 [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 140.9 $ 387.0 $ 180.6 $ 488.2
Foreign Exchange Contract [Member] | Product Revenue [Member]
        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net   2.6   3.2
Foreign Exchange Contract [Member] | Other Income (Expense) [Member]
        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net   48.5 0.3 104.5
Customer Supply Agreements [Member] | Product Revenue [Member]
        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 42.6 46.5 82.0 71.1
Provisional Pricing Arrangements [Member] | Product Revenue [Member]
        
Derivative [Line Items]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 98.3 $ 289.4 $ 98.3 $ 309.4