Derivative Financial Instruments (Schedule Of Notional Amounts And Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional amounts	[1]	$ 4,481	$ 4,080
Other assets		52	154
Accrued liabilities		(136)	(74)
Derivative Asset, Collateral, Obligation to Return Cash, Offset		(24)	(61)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		24	61
Net recorded balance, Other assets		28	93
Net recorded balance, Accrued liabilities		(112)	(13)
Foreign Exchange Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts		3,407	2,930
Other assets		32	131
Accrued liabilities		(132)	(63)
Foreign Exchange Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts		414	406
Other assets		11	16
Accrued liabilities		(2)	(5)
Interest Rate Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts		125	125
Other assets			3
Commodity Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts		57	56
Other assets		9	4
Accrued liabilities		(2)	(6)
Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amounts		$ 478	$ 563

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