Extended Financing Agreement Term

No definition available.

Name:	apa_ExtendedFinancingAgreementTerm
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Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility, Committed Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	apa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility, Maximum Borrowing Capacity, If Adding New Lenders

+ References

No definition available.

+ Details

Name:	apa_LineOfCreditFacilityMaximumBorrowingCapacityIfAddingNewLenders
Namespace Prefix:	apa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility, Number Of Extension Options

+ References

No definition available.

+ Details

Name:	apa_LineOfCreditFacilityNumberOfExtensionOptions
Namespace Prefix:	apa_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
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+ Details

Name:	us-gaap_FinanceLeaseLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of gain (loss) from the difference between the repurchase price of a debt instrument initially issued by the entity and the net carrying amount of the debt at the time of its repurchase.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Details

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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=apa_SeniorNotesDueApril152022Member
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- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
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- Details

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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
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- Details

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- Details

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DEBT AND FINANCING COSTS - Additional Information (Details) £ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2019 USD ($)	Nov. 30, 2018 USD ($) contract	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 GBP (£)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 GBP (£)	Mar. 31, 2018 USD ($)
Debt Instrument [Line Items]
Finance lease obligations, current				$ 2,000,000		$ 2,000,000		$ 2,000,000
Gain on extinguishment of debt			$ 1,000,000	$ 140,000,000	$ 1,000,000	$ 140,000,000
Commercial paper outstanding			0		0			0
Apache credit facility
Debt Instrument [Line Items]
Letters of credit outstanding, amount			34,000,000		34,000,000			17,000,000
Line of credit outstanding			0		0			0
Apache credit facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, committed amount										$ 4,000,000,000.0
Debt extension term	1 year
Senior Notes
Debt Instrument [Line Items]
Debt repurchased principal amount			22,000,000		22,000,000
Debt instrument repurchase program			20,000,000		20,000,000
Discount to par of debt repurchase					2,000,000
Gain on extinguishment of debt					1,000,000
Senior Notes \| Senior Notes Due April 15, 2022
Debt Instrument [Line Items]
Current debt outstanding amount			$ 213,000,000		$ 213,000,000
Debt instrument, stated interest rate			3.25%		3.25%		3.25%
Line of Credit \| Revolving Credit Facility \| Altus Midstream LP
Debt Instrument [Line Items]
Debt extension term		1 year
Credit facility maximum borrowing capacity		$ 800,000,000
Line of credit facility, number of extension options \| contract		2
Line of credit facility, maximum borrowing capacity if adding new lenders		$ 1,500,000,000
Line of Credit \| Letter of Credit \| Altus Midstream LP
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		100,000,000
Line of Credit \| Swingline Loan Subfacility \| Altus Midstream LP
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 100,000,000
Line of Credit \| Apache credit facility
Debt Instrument [Line Items]
Borrowing amount			$ 0		$ 0			150,000,000
Line of Credit \| Apache credit facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 5,000,000,000.0
Line of Credit \| Apache credit facility \| Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, committed amount			2,080,000,000.00		2,080,000,000.00
Credit facility maximum borrowing capacity			3,000,000,000.0		3,000,000,000.0
Letters of credit outstanding, amount			20,000,000		20,000,000		£ 561	40,000,000	£ 633
Line of Credit \| Altus credit facility
Debt Instrument [Line Items]
Borrowing amount			657,000,000		657,000,000			624,000,000
Line of Credit \| Altus credit facility \| Altus Midstream LP
Debt Instrument [Line Items]
Letters of credit outstanding, amount			2,000,000		2,000,000			0
Line of Credit \| Altus credit facility \| Revolving Credit Facility \| Altus Midstream LP
Debt Instrument [Line Items]
Line of credit outstanding			$ 657,000,000		$ 657,000,000			$ 624,000,000