XML 76 R65.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Property, Plant and Equipment (Narrative) (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Apr. 01, 2017 | Dec. 31, 2015
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Total capitalized exploratory well costs | $ 229,084,000 | $ 175,640,000 | $ 229,084,000 | $ 175,640,000 |  | $ 148,500,000 |  |  | $ 130,514,000
Exploratory well costs capitalized more than one year | $ 167,900,000 |  | 167,900,000 |  |  |  |  |  |
Proceeds from sales of property, plant and equipment |  |  | 1,383,000 | 69,506,000 |  | 1,155,144,000 |  |  |
Asset retirement obligation settled |  |  | 23,398,000 | 29,111,000 |  |  |  |  |
Gain (loss) on sale of assets |  |  | 54,000 | 127,434,000 |  | 1,663,000 |  |  |
Costs Incurred Acquisition Of Oil And Gas Properties |  |  | 797,300,000 | 71,100,000 |  | 225,300,000 |  |  |
Cost of acquired assets |  |  | 797,300,000 | 71,100,000 |  | 225,300,000 |  |  |
Impairment of assets |  |  | 20,000,000 | 0 |  | 95,088,000 | [1] |  |
Redetermination expense |  |  | $ 11,332,000 | 15,000,000 | [1] | 39,100,000 | [1] |  |
MP Gulf Of Mexico LLC [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Parent ownership interest | 80.00% |  | 80.00% |  |  |  |  |  |
MP Gulf Of Mexico LLC [Member] | Petrobas America Inc [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Noncontrolling ownership interest | 20.00% |  | 20.00% |  |  |  |  |  |
Athabasca Oil Corporation [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Cost of acquired assets, cash paid |  |  |  |  |  | 206,700,000 |  |  |
Athabasca Oil Corporation [Member] | Canadian Subsidiary [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Costs Incurred Acquisition Of Oil And Gas Properties |  |  |  |  |  | 375,000,000 |  |  |
Cost of acquired assets |  |  |  |  |  | 375,000,000 |  |  |
Petrobas America Inc [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Acquisition, cash paid | $ 794,623,000 |  |  |  |  |  |  |  |
Petrobas America Inc [Member] | Sales Thresholds 2019 to 2025 [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Contingent consideration, maximum | 150,000,000 |  | $ 150,000,000 |  |  |  |  |  |
Petrobas America Inc [Member] | Enhanced Oil Recovery Projects [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Contingent consideration, maximum | 50,000,000 |  | 50,000,000 |  |  |  |  |  |
Western Canada [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from sales of property, plant and equipment |  |  |  | 48,800,000 |  |  |  |  |
Asset retirement obligation settled |  |  |  | 85,900,000 |  |  |  |  |
Gain (loss) on sale of assets |  |  |  | 129,000,000 |  |  |  |  |
Eagle Ford Shale [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from sales of property, plant and equipment |  |  |  | 19,600,000 |  |  |  |  |
Gain (loss) on sale of assets |  |  |  | 0 |  |  |  |  |
Syncrude [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from sales of property, plant and equipment |  |  |  |  |  | 739,100,000 |  |  |
Gain (loss) on sale of assets |  |  |  |  |  | $ 71,700,000 |  |  |
Syncrude [Member] | Canadian Subsidiary [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Percentage of interest in oil and gas property sold during period |  |  |  |  |  | 5.00% |  |  |
Montney Natural Gas Fields [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from sales of property, plant and equipment |  |  |  |  |  | $ 414,100,000 |  |  |
Gain (loss) on sale of assets |  |  | 7,600,000 | 7,100,000 |  |  |  |  |
Deferred gain on sale of property | 160,200,000 |  | $ 160,200,000 |  |  | 187,000,000 |  |  |
Deferred gain, period of recognition |  |  | 17 years |  |  |  |  |  |
Brunei [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Exploratory well costs capitalized more than one year | 55,800,000 |  | $ 55,800,000 |  |  |  |  |  |
Vietnam [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Exploratory well costs capitalized more than one year | 63,500,000 |  | 63,500,000 |  |  |  |  |  |
United States [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Costs Incurred Acquisition Of Oil And Gas Properties |  |  | 797,100,000 | 58,100,000 |  | 18,600,000 |  |  |
Cost of acquired assets |  |  | 797,100,000 | $ 58,100,000 |  | 18,600,000 |  |  |
Malaysia [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Exploratory well costs capitalized more than one year | 21,200,000 |  | 21,200,000 |  |  |  |  |  |
Kaybob Duvernay Lands, Alberta [Member] | Athabasca Oil Corporation [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Cost of acquired assets, carried interest |  |  |  |  |  | $ 168,000,000 |  |  |
Carried interest paid | 102,000,000 |  | 102,000,000 |  |  |  |  |  |
Kaybob Duvernay Lands, Alberta [Member] | Athabasca Oil Corporation [Member] | Canadian Subsidiary [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Interest in assets acquired |  |  |  |  |  | 70.00% |  |  |
Placid Montney Lands, Alberta [Member] | Athabasca Oil Corporation [Member] | Canadian Subsidiary [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Interest in assets acquired |  |  |  |  |  | 30.00% |  |  |
Kakap Field Block K Malaysia [Member] |  |  |  |  |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |  |  |  |  |
Working interest |  | 6.35% |  | 6.35% |  |  |  | 6.67% |
Redetermination expense |  | $ 15,000,000 |  |  |  | $ 39,100,000 |  |  |
Redetermination expense, net of tax |  | $ 9,300,000 |  |  |  | $ 24,100,000 |  |  |
Redetermination liability | $ 17,300,000 |  | $ 17,300,000 |  |  |  |  |  |
[1] | Reclassified to conform to current presentation (see Note B).

X
- Definition Costs Incurred, Acquisition Of Oil And Gas Properties, Accumulated Carried Interest Paid + References No definition available. + Details
Name: | mur_CostsIncurredAcquisitionOfOilAndGasPropertiesAccumulatedCarriedInterestPaid
Namespace Prefix: | mur_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Costs Incurred, Acquisition Of Oil And Gas Properties, Carried Interest + References No definition available. + Details
Name: | mur_CostsIncurredAcquisitionOfOilAndGasPropertiesCarriedInterest
Namespace Prefix: | mur_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deferred Gain On Disposal Group, Period Of Recognition + References No definition available. + Details
Name: | mur_DeferredGainOnDisposalGroupPeriodOfRecognition
Namespace Prefix: | mur_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Interest In Assets Acquired + References No definition available. + Details
Name: | mur_InterestInAssetsAcquired
Namespace Prefix: | mur_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Oil And Gas Property, Working Interest + References No definition available. + Details
Name: | mur_OilAndGasPropertyWorkingInterest
Namespace Prefix: | mur_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage Of Interest In Oil AndGas Properties Sold During Period + References No definition available. + Details
Name: | mur_PercentageOfInterestInOilAndgasPropertiesSoldDuringPeriod
Namespace Prefix: | mur_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Redetermination Expense + References No definition available. + Details
Name: | mur_RedeterminationExpense
Namespace Prefix: | mur_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Redetermination Expense, Net Of Tax + References No definition available. + Details
Name: | mur_RedeterminationExpenseNetOfTax
Namespace Prefix: | mur_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Redetermination Liability, Current + References No definition available. + Details
Name: | mur_RedeterminationLiabilityCurrent
Namespace Prefix: | mur_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_AssetRetirementObligationLiabilitiesSettled
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
Name: | us-gaap_CapitalizedExploratoryWellCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of exploratory well costs that have been capitalized for a period of greater than one year after the completion of drilling. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph b -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
Name: | us-gaap_CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447 + Details
Name: | us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_DeferredGainOnSaleOfProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228 + Details
Name: | us-gaap_GainLossOnDispositionOfAssets1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2921-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 35 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66906256&loc=d3e66150-109466 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
Name: | us-gaap_ImpairmentOfOilAndGasProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireOilAndGasPropertyAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OwnershipAxis=mur_MpGulfOfMexicoLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=mur_PetrobasAmericaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mur_AthabascaOilCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=mur_CanadianSubsidiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mur_PetrobasAmericaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=mur_PriceAndProductionThresholdsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=mur_EnhancedOilRecoveryProjectsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=mur_WesternCanadaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=mur_EagleFordShaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=mur_SyncrudeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=mur_MontneyNaturalGasFieldsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_BN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_VN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_MY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=mur_KaybobDuvernayLandsAlbertaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=mur_PlacidMontneyLandsAlbertaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=mur_KakapFieldBlockKMalaysiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |