(Impact Of Derivative Instruments In Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2020		Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative assets	$ 5	[1]	$ 68	[2]
Derivative liabilities	9	[3]	7	[4]
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	5		68
Derivative liabilities	8		4
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	0		0
Derivative liabilities	1		3
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	0		0
Derivative liabilities	0		1
Energy Related Derivative [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	0		0
Derivative liabilities	1		2
Cash Flow Hedging [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	5		10
Derivative liabilities	8		4
Net Investment Hedging [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	0		11
Derivative liabilities	0		0
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	0		47
Derivative liabilities	$ 0		$ 0

[1] Includes $5 million recorded in Other current assets in the accompanying consolidated balance sheet.

[2] Included $14 million recorded in Other current assets and $54 million Deferred charges recorded in the accompanying consolidated balance sheet.

[3] Included $7 million recorded in Other current liabilities and $2 million recorded in Other liabilities the accompanying consolidated balance sheet.

[4] Included $6 million recorded in Other current liabilities and $1 million recorded in Other liabilities in the accompanying consolidated balance sheet.