Derivative Financial Instruments (Schedule Of Notional Amounts And Fair Values Of Derivative Instruments) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivative, Notional Amount	[1]	$ 4,671	$ 5,164
Other assets		107	34
Accrued liabilities		(100)	(138)
Derivative Asset, Collateral, Obligation to Return Cash, Offset		(31)	(20)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset		31	20
Net recorded balance, Other assets		76	14
Net recorded balance, Accrued liabilities		(69)	(118)
Foreign Exchange Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Notional Amount		2,594	2,590
Other assets		81	29
Accrued liabilities		(24)	(60)
Foreign Exchange Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Notional Amount		769	285
Other assets		22	1
Accrued liabilities		(16)	(6)
Commodity Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Notional Amount		404	645
Other assets		4	4
Accrued liabilities		(43)	(72)
Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Notional Amount		904	$ 1,644
Accrued liabilities		$ (17)

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