Commitments and Contingencies Disclosure [Line Items]

No definition available.

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Period Type:	duration

- Definition

Other Commitment, Capital Projects Relating to Non-Operated Interests

+ References

No definition available.

+ Details

Name:	mur_OtherCommitmentCapitalProjectsRelatingtoNonOperatedInterests
Namespace Prefix:	mur_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next fiscal year following latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.

+ References

+ Details

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

- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.

+ References

+ Details

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

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

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

- Definition

The amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308

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

- Details

Name:	srt_StatementGeographicalAxis=mur_EagleFordShaleMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	srt_StatementGeographicalAxis=mur_GulfofMexicoMember
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- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=mur_ProcessingProductionHandlingAndTransportationServicesMember
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Commitments - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Commitments - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2019
Commitments and Contingencies Disclosure [Line Items]
Future rental payments, next twelve months				$ 124,267
Future rental payments, due year two				74,978
Future rental payments, due year three				56,756
Future rental payments, due year four				54,986
Future rental payments, due year five				50,640
Commitments for capital expenditures				574,500
Commitments for capital projects relating to non-operated interests				379,700
Eagle Ford Shale
Commitments and Contingencies Disclosure [Line Items]
Commitments for capital expenditures				25,400
Gulf of Mexico
Commitments and Contingencies Disclosure [Line Items]
Commitments for capital expenditures				518,000
Processing Production Handling and Transportation Services
Commitments and Contingencies Disclosure [Line Items]
Future rental payments, next twelve months				128,700
Future rental payments, due year two				154,700
Future rental payments, due year three				160,800
Future rental payments, due year four				149,700
Future rental payments, due year five				$ 139,800
Processing and transportation charges	$ 117,700	$ 52,200	$ 53,800