Derivative Financial Instruments (Schedule of Derivative Instruments, Notional Amounts and Fair Values) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Derivative [Line Items]
Notional amounts	$ 3,033	[1]	$ 3,224	[1]
Other assets	171		231
Derivatives, Assets	120		178
Accrued liabilities	(134)		(137)
Derivatives, Liabilities	(83)		(84)
Netting Arrangements [Member]
Derivative [Line Items]
Netting arrangements, Other assets	(51)		(53)
Netting arrangements, Accrued liabilities	51		53
Derivatives designated as hedging instruments: | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts	2,309	[1]	2,310	[1]
Other assets	134		202
Accrued liabilities	(41)		(16)
Derivatives designated as hedging instruments: | Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts	313	[1]	388	[1]
Other assets	16		26
Derivatives designated as hedging instruments: | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts	59	[1]	99	[1]
Accrued liabilities	(52)		(71)
Derivatives not receiving hedge accounting treatment: | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts	342	[1]	412	[1]
Other assets	21		3
Accrued liabilities	(35)		(42)
Derivatives not receiving hedge accounting treatment: | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts	10	[1]	15	[1]
Accrued liabilities	$ (6)		$ (8)

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