Percentage of estimated proved developed reserves classified as proved not producing.

No definition available.

Name:	apa_PercentageOfEstimatedProvedDevelopedReservesClassifiedAsProvedNotProducing
Namespace Prefix:	apa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Energy measure of increase in quantity of proved reserve of oil and gas resulting from the extension of the proved acreage of previously discovered reservoir or discovery of new field with proved reserve or of new reservoir of proved reserve in old field, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

+ Details

Name:	srt_ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy
Namespace Prefix:	srt_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

Energy measure of increase (decrease) in quantity of proved reserve of oil and gas related to revision of a previous estimate resulting from new information, except for an increase in proved acreage, or change in economic factors, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

+ Details

Name:	srt_ProvedDevelopedAndUndevelopedReserveRevisionOfPreviousEstimateEnergy
Namespace Prefix:	srt_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

Energy measure of decrease in quantity of proved reserve of oil and gas resulting from sale of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Form 20-F
-Section Item 18
-Subsection Instruction 2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

+ Details

Name:	srt_ProvedDevelopedAndUndevelopedReservesSaleOfMineralInPlaceEnergy
Namespace Prefix:	srt_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	srt_ReserveQuantitiesLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_StatementGeographicalAxis=srt_NorthAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=apa_SouthernMidlandBasinMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=apa_InternationalRegionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_EG
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=apa_NorthSeaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=apa_EasternShelfAndMagnetWithersPickettRidgeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=apa_AnadarkoBasinMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=apa_PremianBasinMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=apa_MidContinentRegionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	apa_ChangeInPetroleumReservesByTypeAxis=apa_ReservesAccountedOnProductPricesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	apa_ChangeInPetroleumReservesByTypeAxis=apa_ReservesAccountedOnEngineeringAndPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	apa_ChangeInPetroleumReservesByTypeAxis=apa_ReservesAccountedOnInterestRevisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUPPLEMENTAL OIL AND GAS DISCLOSURES (Unaudited) - Additional Information (Details) - MBoe MBoe in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reserve Quantities [Line Items]
Addition from extensions, discoveries, and other additions	78	176	303
Revision of previous estimate	(45)	(119)	(73)
Percentage of estimated proved developed reserves classified as proved not producing	10.00%
North America
Reserve Quantities [Line Items]
Addition from extensions, discoveries, and other additions	39	135	240
Southern Midland Basin
Reserve Quantities [Line Items]
Addition from extensions, discoveries, and other additions	26
International Regions
Reserve Quantities [Line Items]
Addition from extensions, discoveries, and other additions	39	41	62
Egypt
Reserve Quantities [Line Items]
Addition from extensions, discoveries, and other additions	32	27	36
North Sea
Reserve Quantities [Line Items]
Addition from extensions, discoveries, and other additions	7	14	26
Eastern Shelf and Magnet Withers/Pickett Ridge
Reserve Quantities [Line Items]
Sale of mineral in place	10
Anadarko Basin
Reserve Quantities [Line Items]
Sale of mineral in place		107
Premian Basin
Reserve Quantities [Line Items]
Addition from extensions, discoveries, and other additions		129	217
MidContinent Region
Reserve Quantities [Line Items]
Addition from extensions, discoveries, and other additions		6	20
Changes in Product Prices
Reserve Quantities [Line Items]
Revision of previous estimate	(70)	(139)	(24)
Changes in Engineering and Performance
Reserve Quantities [Line Items]
Revision of previous estimate	27	20	(44)
Interest Revisions
Reserve Quantities [Line Items]
Revision of previous estimate	(2)		(5)