Commitment And Contingencies [Line Items]

No definition available.

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- Definition

Disposal Group, Not Discontinued Operation, Discounted Asset Abandonment Liabilities Assumed

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Disposal Group, Not Discontinued Operation, Percentage Of Net Profits Interest For Funding Trust Account

+ References

No definition available.

+ Details

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- Definition

Standby Loan Agreed To Provide Related To Asset Retirement Obligations

+ References

No definition available.

+ Details

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- Definition

Undiscounted amount of the accrual for environmental loss contingencies.

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- Definition

The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of loss contingency liability.

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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-Topic 460
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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

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- Definition

Number of defendants named in a legal action.

+ References

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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions							3 Months Ended	12 Months Ended
COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	Sep. 10, 2020 defendant	Sep. 11, 2019 USD ($) plaintiff	Dec. 20, 2017 Action	Jul. 17, 2017 Action defendant	Mar. 21, 2016 USD ($)	Mar. 20, 2016 USD ($)	Mar. 31, 2021 USD ($) Action	Dec. 31, 2013 USD ($)	Aug. 03, 2020 USD ($)	Dec. 31, 2017 AUD ($)	Apr. 30, 2017 AUD ($)
Commitment And Contingencies [Line Items]
Accrued liability for legal contingencies							$ 62,000,000
Undiscounted reserve for environmental remediation							2,000,000
Standby loan agreed to provide related to ARO									$ 400,000,000
Gulf Of Mexico Shelf Operations and Properties
Commitment And Contingencies [Line Items]
Percentage of net profits interest for funding trust account								10.00%
Gulf Of Mexico Shelf Operations and Properties \| Disposed of by Sale
Commitment And Contingencies [Line Items]
Proceeds from sale of operations and properties								$ 3,750,000,000
discounted asset abandonment liabilities assumed								$ 1,500,000,000
Apollo Exploration Lawsuit
Commitment And Contingencies [Line Items]
Plaintiffs alleged damages					$ 200,000,000
Apollo Exploration Lawsuit \| Minimum
Commitment And Contingencies [Line Items]
Plaintiffs alleged damages						$ 1,100,000,000
Australian Operations Divestiture Dispute \| Apache Australia Operation
Commitment And Contingencies [Line Items]
Gain contingency, unrecorded amount											$ 80
Loss contingency, estimated of possible loss amount										$ 200
Canadian Operations Divestiture Dispute
Commitment And Contingencies [Line Items]
Plaintiffs alleged damages		$ 60,000,000
Number of plaintiffs \| plaintiff		4
California Litigation
Commitment And Contingencies [Line Items]
Number of actions filed \| Action			2	3
Number of defendants \| defendant				30
Delaware Litigation
Commitment And Contingencies [Line Items]
Number of defendants \| defendant	25
Castex Lawsuit
Commitment And Contingencies [Line Items]
Plaintiffs alleged damages							200,000,000
Loss contingency, estimated of possible loss amount							60,000,000
Oklahoma Class Actions
Commitment And Contingencies [Line Items]
Plaintiffs alleged damages							$ 250,000,000
Number of actions filed \| Action							2