Derivative Financial Instruments (Schedule of Derivative Instruments, Notional Amounts and Fair Values) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Derivative [Line Items]
Notional amounts	$ 3,402	[1]	$ 3,177	[1]
Other assets	158		149
Accrued liabilities	(97)		(142)
Derivatives, Assets	114		86
Derivatives, Liabilities	(53)		(79)
Netting Arrangements [Member]
Derivative [Line Items]
Netting arrangements, Accrued liabilities	44		63
Netting arrangements, Other assets	(44)		(63)
Derivatives designated as hedging instruments [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts	2,620	[1]	2,524	[1]
Other assets	113		122
Accrued liabilities	(45)		(64)
Derivatives designated as hedging instruments [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts	313	[1]	313	[1]
Other assets	12		13
Accrued liabilities
Derivatives designated as hedging instruments [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts	63	[1]	72	[1]
Other assets	5		2
Accrued liabilities	(24)		(39)
Derivatives not receiving hedge accounting treatment [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts	400	[1]	259	[1]
Other assets	28		12
Accrued liabilities	(26)		(35)
Derivatives not receiving hedge accounting treatment [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts	6	[1]	9	[1]
Other assets
Accrued liabilities	$ (2)		$ (4)

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