Derivative Instruments and Hedging Activities (Fair Value Of Derivatives Not Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
FX Contracts Assets	$ 191	$ 154
Embedded Derivative, Fair Value of Embedded Derivative Asset	0	0
Commodity Contracts Assets	1,747	1,337
Total fair value of derivative assets not designated as hedging instruments	1,938	1,491
FX Contracts Liabilities	119	275
Commodity Contracts Liabilities	1,252	1,248
Embedded Derivative, Fair Value of Embedded Derivative Liability	0	6
Total fair value of derivative liabilities not designated as hedging instruments.	1,371	1,529
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Interest Rate Derivative Assets, at Fair Value	0	109
Interest Rate Derivative Liabilities, at Fair Value	$ 0	$ 0

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as an asset.

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Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

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Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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Fair value as of the balance sheet date of all price risk derivative assets not designated as hedging instruments.

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Fair value as of the balance sheet date of all price risk derivative liabilities not designated as hedging instruments.

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