Impairment, Oil and Gas, Property with Unproved and Proved Reserves, Non-Controlling Interest

No definition available.

Name:	mur_ImpairmentOilAndGasPropertyWithUnprovedAndProvedReservesNonControllingInterest
Namespace Prefix:	mur_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Net Payable Area

+ References

No definition available.

+ Details

Name:	mur_NetPayableArea
Namespace Prefix:	mur_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Operations And Maintenance Services, Term Of Contract

+ References

No definition available.

+ Details

Name:	mur_OperationsAndMaintenanceServicesTermOfContract
Namespace Prefix:	mur_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Payments To Acquire Additional Working Interests

+ References

No definition available.

+ Details

Name:	mur_PaymentsToAcquireAdditionalWorkingInterests
Namespace Prefix:	mur_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Well Costs Incurred And Expensed

+ References

No definition available.

+ Details

Name:	mur_WellCostsIncurredAndExpensed
Namespace Prefix:	mur_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 55
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479908/805-50-55-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480060/805-50-25-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-2

+ Details

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

- Definition

Amount of addition to capitalized exploratory well cost pending determination of proved reserve in oil- and gas-producing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

+ Details

Name:	us-gaap_CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expense for capitalized exploratory well costs for which proved reserves were not found at the exploratory well.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

+ Details

Name:	us-gaap_CapitalizedExploratoryWellCostChargedToExpense1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

+ Details

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

- Definition

Amount of exploratory well cost capitalized for period of greater than one year after completion of drilling in oil- and gas-producing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 932
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B

+ Details

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

- Definition

Amount of impairment loss for oil and gas properties with proved and unproved reserves in oil- and gas-producing activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-2

+ Details

Name:	us-gaap_ImpairmentOfOilAndGasProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 905
-SubTopic 360
-Name Accounting Standards Codification
-Section 25
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478704/905-360-25-4

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 05
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482338/360-10-05-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482222/360-10-30-2

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 05
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482338/360-10-05-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 05
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482338/360-10-05-3

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 05
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482338/360-10-05-3

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482558/350-40-50-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

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

- Details

Name:	us-gaap_AssetAcquisitionAxis=mur_BWPioneerFloatingProductionStorageAndOffloadingVesselFPSOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mur_BubaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mur_LacDaTrangMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mur_Bubale1XMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mur_Banjo1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mur_Cello1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mur_BlockCI502Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Property, Plant and Equipment - Narrative (Details)	3 Months Ended			9 Months Ended
Property, Plant and Equipment - Narrative (Details)	Sep. 30, 2026 USD ($) foot	Sep. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2026 USD ($) foot	Sep. 30, 2025 USD ($)	Jun. 30, 2026 foot	Mar. 31, 2026 foot	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Property, Plant, and Equipment [Line Items]
Well costs	$ 494,129,000	$ 115,146,000		$ 494,129,000	$ 115,146,000			$ 191,821,000	$ 72,055,000
Additions pending the determination of proved reserves				317,581,000	43,091,000
Capitalized exploratory well costs charged to expense				(10,627,000)	0
Exploratory well costs capitalized more than one year	483,600,000			483,600,000
Impairment of assets	0	115,002,000		0	115,002,000
BW Pioneer Floating Production Storage And Offloading Vessel (FPSO)
Property, Plant, and Equipment [Line Items]
Consideration transferred			$ 125,000,000.0
Operations and maintenance services, term of contract			5 years
Côte d’Ivoire
Property, Plant, and Equipment [Line Items]
Exploratory well costs capitalized more than one year	261,400,000			261,400,000
Vietnam
Property, Plant, and Equipment [Line Items]
Exploratory well costs capitalized more than one year	114,000,000.0			114,000,000.0
Gulf Of America
Property, Plant, and Equipment [Line Items]
Exploratory well costs capitalized more than one year	105,500,000			105,500,000
Brunei
Property, Plant, and Equipment [Line Items]
Exploratory well costs capitalized more than one year	$ 2,700,000			$ 2,700,000
Eagle Ford Shale
Property, Plant, and Equipment [Line Items]
Payments to acquire additional working interests		23,000,000.0
United States - Offshore
Property, Plant, and Equipment [Line Items]
Impairment of assets		115,000,000.0			115,002,000
Impairment of assets excluding NCI		$ 92,000,000.0			$ 92,000,000.0
Bubale West-1X
Property, Plant, and Equipment [Line Items]
Net payable area \| foot	88			88
Lac Da Trang
Property, Plant, and Equipment [Line Items]
Net payable area \| foot	131			131
Bubale-1X
Property, Plant, and Equipment [Line Items]
Net payable area \| foot						100
Banjo
Property, Plant, and Equipment [Line Items]
Net payable area \| foot							50
Cello
Property, Plant, and Equipment [Line Items]
Net payable area \| foot							30
Block CI-502
Property, Plant, and Equipment [Line Items]
Well costs incurred and expensed				$ (76,100,000)