Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets:
Investment in affiliate	$ 134	$ 135
Deferred compensation plan assets	63	74
Investments, fair value disclosure		58
Assets, fair value disclosure	278	267
Liabilities:
Liabilities, fair value disclosure	305	563
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Investment in affiliate	134	135
Deferred compensation plan assets	63	74
Investments, fair value disclosure		58
Assets, fair value disclosure	197	267
Liabilities:
Liabilities, fair value disclosure	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Investment in affiliate	0	0
Deferred compensation plan assets	0	0
Investments, fair value disclosure		0
Assets, fair value disclosure	0	0
Liabilities:
Liabilities, fair value disclosure	223	486
Significant Unobservable Inputs (Level 3)
Assets:
Investment in affiliate	0	0
Deferred compensation plan assets	0	0
Investments, fair value disclosure		0
Assets, fair value disclosure	81	0
Liabilities:
Liabilities, fair value disclosure	82	77
Marketing derivatives
Assets:
Derivative assets	81
Liabilities:
Derivative liabilities	82	77
Marketing derivatives \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Derivative assets	0
Liabilities:
Derivative liabilities	0	0
Marketing derivatives \| Significant Other Observable Inputs (Level 2)
Assets:
Derivative assets	0
Liabilities:
Derivative liabilities	0	0
Marketing derivatives \| Significant Unobservable Inputs (Level 3)
Assets:
Derivative assets	81
Liabilities:
Derivative liabilities	82	77
Commodity derivatives
Liabilities:
Derivative liabilities	223	486
Commodity price and marketing derivatives related to equal and offsetting oil and gas commodity derivative trades	84	328
Commodity derivatives \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Liabilities:
Derivative liabilities	0	0
Commodity derivatives \| Significant Other Observable Inputs (Level 2)
Liabilities:
Derivative liabilities	223	486
Commodity derivatives \| Significant Unobservable Inputs (Level 3)
Liabilities:
Derivative liabilities	$ 0	$ 0

Derivative Liability, Fair Value, Related to Equal and Offsetting Oil and Gas Commodity Derivative Trades

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Publisher FASB
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-Topic 820
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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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Fair value, after offset of derivative liability, of 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, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Fair value portion of investments in an entity not consolidated. Includes, but is not limited to, investments in an entity that is affiliated with the reporting entity by means of direct or indirect ownership, an entity in which the reporting entity shares control of the entity with another party or group, an entity which the company has significant influence, but does not have control and subsidiaries that are not required to be consolidated and are accounted for using the equity or cost method.

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Fair value of financial and nonfinancial obligations.

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