Derivative Financial Instruments (Schedule of Derivative Instruments, Notional Amounts and Fair Values) (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Notional amounts	[1]	$ 3,698	$ 3,875
Other Assets		145	68
Accrued Liabilities		(85)	(247)
Netting Arrangements, Other Assets		(64)	(45)
Netting Arrangements, Accrued Liabilities		64	45
Net Recorded balance, Other Assets		81	23
Net Recorded balance, Accrued Liabilities		(21)	(202)
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts		2,496	2,584
Other Assets		117	34
Accrued Liabilities		(70)	(225)
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts		125	125
Other Assets		4	6
Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts		41	53
Other Assets		2	7
Accrued Liabilities		(6)	(5)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amounts		479	465
Other Assets		22	21
Accrued Liabilities		(9)	(17)
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Notional amounts		$ 557	$ 648

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