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Joint Venture Agreement, Additional Cash Payment To Receive Upon Achieving Of First Production

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Joint Venture Agreement, Future Consideration Term, Appraisal And Development Capital Cap

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Joint Venture Agreement, Percentage Of Consideration Carried On Appraisal And Development Capital

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Joint Venture Agreement, Percentage Of Costs Incurred For Reimbursement

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Number Of Joint Venture Equity Options

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Number Of Joint Venture Equity Options Exercised

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Proceeds Expected To Receive From Joint Venture

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Proceeds Received From Joint Venture

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Proceeds Received From Joint Venture, For Reimbursement Of Cost Incurred

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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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Amount of gain (loss) on sale or disposal of proven and unproven oil and gas properties.

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The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The cash outflow to purchase of mineral interests in oil and gas properties for use in the normal oil and gas operations and not intended for resale.

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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ACQUISITIONS AND DIVESTITURES - 2019 Activity (Details) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Dec. 31, 2019 USD ($) equity_option	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) equity_option	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Proceeds from sale of oil and gas properties					$ 166	$ 718	$ 138
Leasehold and property acquisitions amount					4	$ 40	133
Number of joint venture equity options exercised \| equity_option	4					4
Number of joint venture equity options \| equity_option	5					5
OKLAHOMA
Business Acquisition [Line Items]
Gain (loss) on sale of oil and gas properties		$ 19
Permian Region
Business Acquisition [Line Items]
Leasehold and property acquisitions amount					4	$ 40	$ 133
Block 58 Offshore Suriname
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners	50.00%					50.00%
Proceeds received from joint venture	$ 100
Proceeds from joint venture agreement, for reimbursement of cost incurred	$ 79
Joint venture agreement, percentage of costs incurred for reimbursement	50.00%
Proceeds expected to receive from joint venture	$ 5,000					$ 5,000
Carrying cash consideration	$ 7,500					$ 7,500
Percentage of consideration carried on appraisal and development capital	25.00%					25.00%
Additional cash payment to receive upon achieving first production	$ 75
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Oklahoma And Texas
Business Acquisition [Line Items]
Proceeds from sale of oil and gas properties			$ 322
Asset retirement obligation assumed			49
Asset impairments for property and equipment			240			$ 255
Gain (loss) on sale of oil and gas properties			$ (7)
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| OKLAHOMA
Business Acquisition [Line Items]
Proceeds from sale of oil and gas properties				$ 223
Gain (loss) on sale of oil and gas properties				17
Property and equipment, net				$ 206
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Permian Region
Business Acquisition [Line Items]
Proceeds from sale of oil and gas properties					87	73
Gain (loss) on sale of oil and gas properties					$ 13	$ 33