Derivative Financial Instruments (Schedule of Derivative Instruments, Notional Amounts and Fair Values) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Derivative [Line Items]
Notional amounts	$ 2,980	[1]	$ 3,177	[1]
Other assets	144		149
Accrued liabilities	(143)		(142)
Derivatives, Assets	88		86
Derivatives, Liabilities	(87)		(79)
Netting Arrangements [Member]
Derivative [Line Items]
Netting arrangements, Accrued liabilities	56		63
Netting arrangements, Other assets	(56)		(63)
Derivatives designated as hedging instruments [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts	2,326	[1]	2,524	[1]
Other assets	114		122
Accrued liabilities	(77)		(64)
Derivatives designated as hedging instruments [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts	313	[1]	313	[1]
Other assets	13		13
Accrued liabilities
Derivatives designated as hedging instruments [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts	50	[1]	72	[1]
Other assets	3		2
Accrued liabilities	(33)		(39)
Derivatives not receiving hedge accounting treatment [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts	284	[1]	259	[1]
Other assets	14		12
Accrued liabilities	(30)		(35)
Derivatives not receiving hedge accounting treatment [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts	7	[1]	9	[1]
Other assets
Accrued liabilities	$ (3)		$ (4)

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