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