Derivative Financial Instruments (Schedule Of Notional Amounts And Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional amounts	[1]	$ 3,875	$ 4,053
Other assets		68	38
Accrued liabilities		(247)	(328)
Derivative Asset, Collateral, Obligation to Return Cash, Offset		(45)	(23)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		45	23
Net recorded balance, Other assets		23	15
Net recorded balance, Accrued liabilities		(202)	(305)
Foreign Exchange Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts	[1]	2,584	2,727
Other assets		34	23
Accrued liabilities		(225)	(304)
Foreign Exchange Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts	[1]	465	436
Other assets		21	4
Accrued liabilities		(17)	(11)
Interest Rate Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts	[1]	125	125
Other assets		6	9
Commodity Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts	[1]	53	40
Other assets		7	2
Accrued liabilities		(5)	(13)
Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts	[1]	$ 648	$ 725

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