Hedging Activities (Effect Of Derivative Financial Instruments On Consolidated Financial Statements And Undesignated Derivatives) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012		Dec. 31, 2011
Cash Flow Hedges [Member]
Derivatives Fair Value [Line Items]
Gain/(loss) recognized in other comprehensive income (OCI)	$ 31		$ (18)
Gain reclassified from accumulated OCI into income (effective)	4	[1]	9	[1]
Derivatives Not Designated As Hedging Instruments [Member]
Derivatives Fair Value [Line Items]
Gain/(loss) recognized in income	138		143
Foreign Exchange Contracts [Member] | Cash Flow Hedges [Member]
Derivatives Fair Value [Line Items]
Gain/(loss) recognized in other comprehensive income (OCI)	31		(18)
Cost Of Sales [Member] | Cash Flow Hedges [Member]
Derivatives Fair Value [Line Items]
Gain reclassified from accumulated OCI into income (effective)	1	[1]	2	[1]
Royalties [Member] | Cash Flow Hedges [Member]
Derivatives Fair Value [Line Items]
Gain reclassified from accumulated OCI into income (effective)	3	[1]	7	[1]
Other Income/(Expense) [Member] | Foreign Exchange Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Derivatives Fair Value [Line Items]
Gain/(loss) recognized in income	$ 138		$ 143

[1] The amount of hedge ineffectiveness at March 31, 2012 and 2011 was insignificant