Derivative Financial Instruments (Schedule Of Notional Amounts And Fair Values Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Derivative [Line Items]
Notional amounts	$ 3,125	[1]	$ 3,224	[1]
Other assets	209		231
Derivatives, Assets	150		178
Accrued liabilities	(147)		(137)
Derivatives, Liabilities	(88)		(84)
Netting Arrangements [Member]
Derivative [Line Items]
Netting arrangements, Accrued liabilities	(59)		(53)
Netting arrangements, Other assets	59		53
Derivatives designated as hedging instruments: | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts	2,375	[1]	2,310	[1]
Other assets	180		202
Accrued liabilities	(34)		(16)
Derivatives designated as hedging instruments: | Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts	313	[1]	388	[1]
Other assets	24		26
Derivatives designated as hedging instruments: | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts	81	[1]	99	[1]
Accrued liabilities	(62)		(71)
Derivatives not receiving hedge accounting treatment: | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts	340	[1]	412	[1]
Other assets	5		3
Accrued liabilities	(43)		(42)
Derivatives not receiving hedge accounting treatment: | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts	16	[1]	15	[1]
Accrued liabilities	$ (8)		$ (8)

[1] Notional amounts represent the gross contract/notional amount of the derivatives outstanding.