SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($)		3 Months Ended				9 Months Ended	12 Months Ended
	Dec. 27, 2021	Dec. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Significant Accounting Policies [Line Items]
Asset impairments					$ 1,400,000,000		$ 208,000,000	$ 4,501,000,000	$ 2,949,000,000
Equity method investment impairment		$ 160,000,000					160,000,000	0	0
Inventory and other							48,000,000	27,000,000	21,000,000
Impairments							208,000,000	4,501,000,000	2,949,000,000
Goodwill impairment							0	87,000,000	0
Impairment for early termination of drilling rig leases						$ 13,000,000
Inventory write-downs			$ 5,000,000
Other asset impairments			$ 9,000,000
Receivables from contracts with customers, net of allowance for doubtful accounts		956,000,000				670,000,000	956,000,000	670,000,000
PSC, percentage of gross acreage consolidated	98.00%
PSC, percentage of gross production consolidated	90.00%
PSC, development lease term	20 years
PSC, exploration lease term	5 years
PSC, cost recovery limit	40.00%
PSC, fixed profit-sharing rate	30.00%
Cash and cash equivalent		279,000,000				262,000,000	279,000,000	262,000,000
Restricted cash		0				0	0	0
Oil and gas property impaired, fair value					$ 628,000,000	1,900,000,000		1,900,000,000	628,000,000
Divested unproved properties and leasehold							0	0	149,000,000
Gathering, processing, and transmission facilities ($209 and $206 related to Altus VIE)		673,000,000				670,000,000	673,000,000	670,000,000
GPT facilities, accumulated depreciation		386,000,000				323,000,000	386,000,000	323,000,000
Other property and equipment		1,126,000,000				1,140,000,000	1,126,000,000	1,140,000,000
Other property and equipment, accumulated depreciation		(901,000,000)				(864,000,000)	(901,000,000)	(864,000,000)
Restructuring cumulative cost incurred to date						79,000,000		79,000,000
Transaction, reorganization, and separation							22,000,000	54,000,000	50,000,000
Egypt
Schedule Of Significant Accounting Policies [Line Items]
Goodwill impairment								87,000,000	0
Employee Severance
Schedule Of Significant Accounting Policies [Line Items]
Transaction, reorganization, and separation							6,000,000	51,000,000	26,000,000
Consulting and Legal Fees
Schedule Of Significant Accounting Policies [Line Items]
Transaction, reorganization, and separation							11,000,000	2,000,000	2,000,000
Office closure
Schedule Of Significant Accounting Policies [Line Items]
Transaction, reorganization, and separation							5,000,000	1,000,000
Employee Termination and Office Closures
Schedule Of Significant Accounting Policies [Line Items]
Transaction, reorganization, and separation									15,000,000
Other restructuring
Schedule Of Significant Accounting Policies [Line Items]
Transaction, reorganization, and separation									7,000,000
Consulting And Separation Activities
Schedule Of Significant Accounting Policies [Line Items]
Transaction, reorganization, and separation							17,000,000
Alpine High Play
Schedule Of Significant Accounting Policies [Line Items]
Oil and gas property impaired, fair value						203,000,000		203,000,000
Egypt
Schedule Of Significant Accounting Policies [Line Items]
Inventory and other							26,000,000
North Sea
Schedule Of Significant Accounting Policies [Line Items]
Inventory and other							22,000,000
Oklahoma And Texas
Schedule Of Significant Accounting Policies [Line Items]
Impairment of assets to be disposed of									255,000,000
Oil and gas proved property
Schedule Of Significant Accounting Policies [Line Items]
Impairments							0	4,319,000,000	1,484,000,000
Tangible asset impairment charges						20,000,000	0	4,319,000,000	$ 1,484,000,000
Oil and gas proved property | Significant Unobservable Inputs (Level 3) | Measurement Input, Discount Rate
Schedule Of Significant Accounting Policies [Line Items]
Oil and gas properties, measurement inputs					10.00%				10.00%
Oil and gas proved property | United States
Schedule Of Significant Accounting Policies [Line Items]
Impairments				$ 3,900,000,000			0	3,938,000,000	$ 1,484,000,000
Oil and gas proved property | Egypt
Schedule Of Significant Accounting Policies [Line Items]
Impairments				354,000,000			0	374,000,000	0
Oil and gas proved property | North Sea
Schedule Of Significant Accounting Policies [Line Items]
Impairments				7,000,000			0	7,000,000	0
Oil and gas proved property | Oklahoma And Texas
Schedule Of Significant Accounting Policies [Line Items]
Impairment of assets to be disposed of									101,000,000
Gathering, processing, and transmission facilities
Schedule Of Significant Accounting Policies [Line Items]
Oil and gas property impaired, fair value				$ 46,000,000
Tangible asset impairment charges							0	68,000,000	1,295,000,000
Oil and Gas Properties, Unproved
Schedule Of Significant Accounting Policies [Line Items]
Impairments							31,000,000	101,000,000	768,000,000
Oil and Gas Properties, Unproved | United States
Schedule Of Significant Accounting Policies [Line Items]
Impairments							22,000,000	92,000,000	760,000,000
Oil and Gas Properties, Unproved | Egypt
Schedule Of Significant Accounting Policies [Line Items]
Impairments							8,000,000	8,000,000	8,000,000
Oil and Gas Properties, Unproved | North Sea
Schedule Of Significant Accounting Policies [Line Items]
Impairments							$ 1,000,000	1,000,000	0
Oil and Gas Properties, Unproved | Oklahoma And Texas
Schedule Of Significant Accounting Policies [Line Items]
Impairment of assets to be disposed of									149,000,000
Divested unproved properties and leasehold									149,000,000
Other Working Capital | Oklahoma And Texas
Schedule Of Significant Accounting Policies [Line Items]
Impairment of assets to be disposed of									$ 5,000,000
Other Property and Equipment | Minimum
Schedule Of Significant Accounting Policies [Line Items]
Useful lives of gas gathering, transmission and processing facilities							3 years
Other Property and Equipment | Maximum
Schedule Of Significant Accounting Policies [Line Items]
Useful lives of gas gathering, transmission and processing facilities							20 years
ALTM
Schedule Of Significant Accounting Policies [Line Items]
Cash and cash equivalent		$ 132,000,000				$ 24,000,000	$ 132,000,000	$ 24,000,000
ALTM | Gathering, processing, and transmission facilities
Schedule Of Significant Accounting Policies [Line Items]
Impairments					$ 1,300,000,000
Apache Egypt
Schedule Of Significant Accounting Policies [Line Items]
Noncontrolling interest, ownership percentage by parent	66.67%
Apache Egypt | Sinopec
Schedule Of Significant Accounting Policies [Line Items]
Ownership percentage		33.33%					33.33%
ALTM | Third-party investors
Schedule Of Significant Accounting Policies [Line Items]
Ownership percentage		21.00%					21.00%