Derivative Financial Instruments (Schedule of Derivative Instruments, Notional Amounts and Fair Values) (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Notional amounts	[1]	$ 5,295	$ 4,481
Other Assets		56	52
Accrued Liabilities		(119)	(136)
Netting Arrangements, Other Assets		(22)	(24)
Netting Arrangements, Accrued Liabilities		22	24
Net Recorded balance, Other Assets		34	28
Net Recorded balance, Accrued Liabilities		(97)	(112)
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts		3,337	3,407
Other Assets		37	32
Accrued Liabilities		(94)	(132)
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts		125	125
Other Assets		1
Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts		822	57
Other Assets		11	9
Accrued Liabilities		(20)	(2)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts		663	414
Other Assets		7	11
Accrued Liabilities		(5)	(2)
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts		$ 348	$ 478

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