COMMITMENTS AND CONTINGENCIES (Details) $ in Millions								3 Months Ended	12 Months Ended
		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 ($)	Mar. 31, 2022 USD ($) bond subsidiary Action	Dec. 31, 2021 USD ($) sidetrack	Dec. 31, 2013 USD ($) source	Sep. 30, 2021 USD ($)	Dec. 31, 2017 AUD ($)	Apr. 30, 2017 AUD ($)	Mar. 12, 2014 USD ($)
Commitment And Contingencies [Line Items]
Accrued liability for legal contingencies								$ 73,000,000
Environmental tax and royalty obligations														$ 100,000,000
Retain right of obligations								45,000,000
Undiscounted reserve for environmental remediation								2,000,000
Standby loan agreed to provide related to ARO								400,000,000
Current decommissioning contingency for sold Gulf of Mexico properties								1,200,000,000
Decommissioning contingency for sold Gulf of Mexico properties, total	[1]							1,086,000,000	$ 1,086,000,000
Current decommissioning contingency for sold Gulf of Mexico properties								100,000,000	100,000,000
Decommissioning security for sold properties									740,000,000
Trust account for disposal group, number of net profits interests	[1]							$ 640,000,000	640,000,000
Current decommissioning security for sold Gulf of Mexico assets									100,000,000
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
Trust account for disposal group, number of net profits interests | source										2
Number of bonds held | bond								2
Number of debt instruments held | subsidiary								5
Minimum
Commitment And Contingencies [Line Items]
Asset retirement obligation, estimated liability											$ 1,200,000,000
Maximum
Commitment And Contingencies [Line Items]
Asset retirement obligation, estimated liability											$ 1,400,000,000
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								$ 13,500,000	$ 60,000,000
Number of sidetracks | sidetrack									5
Oklahoma Class Actions
Commitment And Contingencies [Line Items]
Plaintiffs alleged damages								$ 200,000,000
Number of actions filed | Action								2

[1] The Altus VIE amounts are disclosed as of December 31, 2021. All Altus balances were deconsolidated as of February 22, 2022. Refer to Note 1—Summary of Significant Accounting Policies and Note 3—Acquisitions and Divestitures for further detail.