Derivative Financial Instruments (Schedule of Derivative Instruments, Notional Amounts and Fair Values) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional amounts	[1]	$ 4,337	$ 4,080
Other Assets		76	154
Accrued Liabilities		(99)	(74)
Netting Arrangements, Other Assets		(40)	(61)
Netting Arrangements, Accrued Liabilities		40	61
Net Recorded balance, Other Assets		36	93
Net Recorded balance, Accrued Liabilities		(59)	(13)
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts		3,174	2,930
Other Assets		59	131
Accrued Liabilities		(89)	(63)
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts		125	125
Other Assets		1	3
Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts		26	56
Other Assets		5	4
Accrued Liabilities		(5)	(6)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts		332	406
Other Assets		11	16
Accrued Liabilities		(5)	(5)
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts		$ 680	$ 563

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