XML 139 R124.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Supplemental Oil and Gas Information - Summary of Proved Reserves Based on Average Prices (Details) MMBbls in Millions, ft³ in Billions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 MMBbls ft³ | Dec. 31, 2018 MMBbls ft³ | Dec. 31, 2017 MMBbls ft³ | Dec. 31, 2016 MMBbls ft³
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed reserves | 472.3 | 430.2 | 346.7 | 343.5
Proved undeveloped reserves | 352.7 | 413.8 | 351.5 | 341.1
Crude Oil |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 844.0 | 698.2 | 684.5 |
Revisions of previous estimates | 28.4 | (21.8) | (5.6) |
Improved recovery |  | 0.9 | 2.0 |
Extensions and discoveries | 73.3 | 122.6 | 71.2 |
Purchases of properties | 76.2 | 106.9 | 5.9 |
Sales of properties | (121.5) |  |  |
Production | (75.4) | (62.8) | (59.8) |
Proved developed and undeveloped reserves, Ending Balance | 825.0 | 844.0 | 698.2 |
Net crude oil and condensate revenue | Crude Oil |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 432.5 | 328.1 | 329.0 |
Revisions of previous estimates | (31.0) | (15.3) | (6.0) |
Improved recovery |  | 0.8 | 2.0 |
Extensions and discoveries | 58.2 | 58.9 | 31.6 |
Purchases of properties | 56.3 | 93.6 | 4.7 |
Sales of properties | (45.8) |  |  |
Production | (46.3) | (33.6) | (33.2) |
Proved developed and undeveloped reserves, Ending Balance | 423.9 | 432.5 | 328.1 |
Proved developed reserves | 230.9 | 249.3 | 185.5 | 184.9
Proved undeveloped reserves | 193.0 | 183.2 | 142.6 | 144.1
Net natural gas liquids revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 54.2 | 48.9 | 42.5 |
Revisions of previous estimates | (5.0) | (6.2) | 1.3 |
Extensions and discoveries | 6.8 | 12.0 | 7.8 |
Purchases of properties | 5.2 | 3.0 | 0.5 |
Sales of properties | (0.6) |  |  |
Production | (4.5) | (3.5) | (3.2) |
Proved developed and undeveloped reserves, Ending Balance | 56.1 | 54.2 | 48.9 |
Proved developed reserves | 28.1 | 27.3 | 24.6 | 22.2
Proved undeveloped reserves | 28.0 | 26.9 | 24.3 | 20.3
Net natural gas revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | ft³ | 2,143.6 | 1,927.1 | 1,878.0 |
Revisions of previous estimates | ft³ | 386.5 | (1.8) | (5.4) |
Improved recovery | ft³ |  | 0.6 |  |
Extensions and discoveries | ft³ | 49.8 | 310.3 | 190.6 |
Purchases of properties | ft³ | 88.3 | 61.7 | 4.0 |
Sales of properties | (450,700.0) |  |  |
Production | ft³ | (147.8) | (154.3) | (140.1) |
Proved developed and undeveloped reserves, Ending Balance | ft³ | 2,069.7 | 2,143.6 | 1,927.1 |
Proved developed reserves | ft³ | 1,279.8 | 921.6 | 819.3 | 818.1
Proved undeveloped reserves | ft³ | 789.9 | 1,222.0 | 1,107.8 | 1,059.9
MP Gulf of Mexico LLC |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped reserves, Ending Balance | 24.6 |  |  |
Proved developed reserves | 19.6 |  |  |
Proved undeveloped reserves | 5.0 |  |  |
MP Gulf of Mexico LLC | Net crude oil and condensate revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped reserves, Ending Balance | 22.1 |  |  |
Proved developed reserves | 17.7 |  |  |
Proved undeveloped reserves | 4.4 |  |  |
MP Gulf of Mexico LLC | Net natural gas liquids revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped reserves, Ending Balance | 0.9 |  |  |
Proved developed reserves | 0.7 |  |  |
Proved undeveloped reserves | 0.2 |  |  |
MP Gulf of Mexico LLC | Net natural gas revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped reserves, Ending Balance | ft³ | 9.5 |  |  |
Proved developed reserves | ft³ | 7.1 |  |  |
Proved undeveloped reserves | ft³ | 2.4 |  |  |
United States |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed reserves | 273.4 | 247.0 | 170.9 | 157.8
Proved undeveloped reserves | 226.7 | 178.7 | 134.0 | 129.6
United States | Crude Oil |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 425.6 | 304.9 | 287.4 |
Revisions of previous estimates | (17.9) | (14.0) | (5.4) |
Improved recovery |  | 0.0 | 0.0 |
Extensions and discoveries | 62.2 | 60.1 | 39.6 |
Purchases of properties | 76.2 | 98.7 | 5.9 |
Sales of properties | (0.1) |  |  |
Production | (45.9) | (24.0) | (22.5) |
Proved developed and undeveloped reserves, Ending Balance | 500.1 | 425.6 | 304.9 |
United States | Net crude oil and condensate revenue | Crude Oil |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 326.5 | 224.7 | 214.4 |
Revisions of previous estimates | (17.1) | (15.0) | (4.7) |
Improved recovery |  | 0.0 | 0.0 |
Extensions and discoveries | 49.2 | 42.9 | 27.2 |
Purchases of properties | 56.3 | 92.3 | 4.7 |
Sales of properties | (0.1) |  |  |
Production | (37.0) | (18.4) | (16.9) |
Proved developed and undeveloped reserves, Ending Balance | 377.8 | 326.5 | 224.7 |
Proved developed reserves | 205.0 | 189.0 | 126.3 | 113.9
Proved undeveloped reserves | 172.8 | 137.5 | 98.4 | 100.5
United States | Net natural gas liquids revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 47.6 | 43.0 | 36.4 |
Revisions of previous estimates | (2.5) | (5.3) | 2.0 |
Extensions and discoveries | 6.4 | 9.7 | 7.0 |
Purchases of properties | 5.2 | 3.0 | 0.5 |
Sales of properties | 0.0 |  |  |
Production | (3.9) | (2.8) | (2.9) |
Proved developed and undeveloped reserves, Ending Balance | 52.8 | 47.6 | 43.0 |
Proved developed reserves | 26.2 | 24.9 | 23.3 | 20.8
Proved undeveloped reserves | 26.6 | 22.7 | 19.7 | 15.6
United States | Net natural gas revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | ft³ | 309.0 | 223.3 | 219.4 |
Revisions of previous estimates | ft³ | 10.3 | 37.6 | (16.0) |
Improved recovery | ft³ |  | 0.0 |  |
Extensions and discoveries | ft³ | 39.5 | 44.7 | 32.2 |
Purchases of properties | ft³ | 88.3 | 20.3 | 4.0 |
Sales of properties | (100.0) |  |  |
Production | ft³ | (30.2) | (16.9) | (16.3) |
Proved developed and undeveloped reserves, Ending Balance | ft³ | 416.8 | 309.0 | 223.3 |
Proved developed reserves | ft³ | 253.1 | 198.3 | 127.7 | 138.7
Proved undeveloped reserves | ft³ | 163.7 | 110.7 | 95.6 | 80.7
Canada |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed reserves | 198.1 | 124.2 | 114.1 | 103.3
Proved undeveloped reserves | 126.0 | 164.5 | 145.1 | 137.7
Canada | Crude Oil |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 288.6 | 259.2 | 241.0 |
Revisions of previous estimates | 46.1 | (18.1) | 4.9 |
Improved recovery |  | 0.0 | 0.0 |
Extensions and discoveries | 11.1 | 61.8 | 31.3 |
Purchases of properties | 0.0 | 6.9 | 0.0 |
Sales of properties | 0.0 |  |  |
Production | (21.7) | (21.1) | (18.1) |
Proved developed and undeveloped reserves, Ending Balance | 324.1 | 288.6 | 259.2 |
Canada | Net crude oil and condensate revenue | Crude Oil |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 55.0 | 51.5 | 48.9 |
Revisions of previous estimates | (14.0) | (8.0) | 2.3 |
Improved recovery |  | 0.0 | 0.0 |
Extensions and discoveries | 9.0 | 16.0 | 4.4 |
Purchases of properties | 0.0 | 0.0 | 0.0 |
Sales of properties | 0.0 |  |  |
Production | (4.7) | (4.5) | (4.1) |
Proved developed and undeveloped reserves, Ending Balance | 45.3 | 55.0 | 51.5 |
Proved developed reserves | 25.1 | 23.3 | 21.9 | 19.2
Proved undeveloped reserves | 20.2 | 31.7 | 29.6 | 29.7
Canada | Net natural gas liquids revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 5.9 | 5.6 | 5.6 |
Revisions of previous estimates | (2.5) | (1.6) | (0.6) |
Extensions and discoveries | 0.4 | 2.3 | 0.8 |
Purchases of properties | 0.0 | 0.0 | 0.0 |
Sales of properties | 0.0 |  |  |
Production | (0.5) | (0.4) | (0.2) |
Proved developed and undeveloped reserves, Ending Balance | 3.3 | 5.9 | 5.6 |
Proved developed reserves | 1.9 | 1.7 | 1.0 | 0.9
Proved undeveloped reserves | 1.4 | 4.2 | 4.6 | 4.7
Canada | Net natural gas revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | ft³ | 1,366.4 | 1,212.4 | 1,118.9 |
Revisions of previous estimates | ft³ | 375.3 | (51.2) | 19.4 |
Improved recovery | ft³ |  | 0.0 |  |
Extensions and discoveries | ft³ | 10.3 | 261.0 | 156.7 |
Purchases of properties | ft³ | 0.0 | 41.4 | 0.0 |
Sales of properties | 0.0 |  |  |
Production | ft³ | (99.1) | (97.2) | (82.6) |
Proved developed and undeveloped reserves, Ending Balance | ft³ | 1,652.9 | 1,366.4 | 1,212.4 |
Proved developed reserves | ft³ | 1,026.7 | 595.0 | 547.0 | 498.9
Proved undeveloped reserves | ft³ | 626.2 | 771.4 | 665.5 | 620.0
Malaysia & Other |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed reserves | 0.8 | 59.1 | 61.7 | 82.4
Proved undeveloped reserves | 0.0 | 70.7 | 72.4 | 73.8
Malaysia & Other | Crude Oil |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 129.7 | 134.1 | 156.2 |
Revisions of previous estimates | 0.3 | 10.4 | (5.2) |
Improved recovery |  | 0.9 | 2.0 |
Extensions and discoveries | 0.0 | 0.8 | 0.3 |
Purchases of properties | 0.0 | 1.3 | 0.0 |
Sales of properties | (121.4) |  |  |
Production | (7.8) | (17.7) | (19.2) |
Proved developed and undeveloped reserves, Ending Balance | 0.8 | 129.7 | 134.1 |
Malaysia & Other | Net crude oil and condensate revenue | Crude Oil |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 51.0 | 51.9 | 65.7 |
Revisions of previous estimates | 0.1 | 7.7 | (3.6) |
Improved recovery |  | 0.8 | 2.0 |
Extensions and discoveries | 0.0 | 0.0 | 0.0 |
Purchases of properties | 0.0 | 1.3 | 0.0 |
Sales of properties | (45.7) |  |  |
Production | (4.6) | (10.7) | (12.2) |
Proved developed and undeveloped reserves, Ending Balance | 0.8 | 51.0 | 51.9 |
Proved developed reserves | 0.8 | 37.0 | 37.3 | 51.8
Proved undeveloped reserves | 0.0 | 14.0 | 14.6 | 13.9
Malaysia & Other | Net natural gas liquids revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | 0.7 | 0.3 | 0.5 |
Revisions of previous estimates | 0.0 | 0.7 | (0.1) |
Extensions and discoveries | 0.0 | 0.0 | 0.0 |
Purchases of properties | 0.0 | 0.0 | 0.0 |
Sales of properties | (0.6) |  |  |
Production | (0.1) | (0.3) | (0.1) |
Proved developed and undeveloped reserves, Ending Balance | 0.0 | 0.7 | 0.3 |
Proved developed reserves | 0.0 | 0.7 | 0.3 | 0.5
Proved undeveloped reserves | 0.0 | 0.0 | 0.0 | 0.0
Malaysia & Other | Net natural gas revenue |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, Beginning Balance | ft³ | 468.2 | 491.4 | 539.7 |
Revisions of previous estimates | ft³ | 0.9 | 11.8 | (8.8) |
Improved recovery | ft³ |  | 0.6 |  |
Extensions and discoveries | ft³ | 0.0 | 4.6 | 1.7 |
Purchases of properties | ft³ | 0.0 | 0.0 | 0.0 |
Sales of properties | (450,600.0) |  |  |
Production | ft³ | (18.5) | (40.2) | (41.2) |
Proved developed and undeveloped reserves, Ending Balance | ft³ | 0.0 | 468.2 | 491.4 |
Proved developed reserves | ft³ | 0.0 | 128.3 | 144.6 | 180.5
Proved undeveloped reserves | ft³ | 0.0 | 339.9 | 346.7 | 359.2

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | srt_IncreaseDecreaseInProvedDevelopedAndUndevelopedReservesRollForward
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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_ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Changes in proved reserve estimates resulting from application of improved recovery techniques. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447 + Details
Name: | srt_ProvedDevelopedAndUndevelopedReservesImprovedRecovery
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61797-109447 + Details
Name: | srt_ProvedDevelopedAndUndevelopedReservesNet
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Production of proved reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447 + Details
Name: | srt_ProvedDevelopedAndUndevelopedReservesProduction
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase of minerals in place. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447 + Details
Name: | srt_ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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_ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sales of minerals in place. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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_ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61797-109447 + Details
Name: | srt_ProvedDevelopedReservesVolume
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net quantities of an enterprise's interests in proved undeveloped reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other renewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61797-109447 + Details
Name: | srt_ProvedUndevelopedReserveVolume
Namespace Prefix: | srt_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_CrudeOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ReserveQuantitiesByTypeOfReserveAxis=srt_OilReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ReserveQuantitiesByTypeOfReserveAxis=srt_NaturalGasLiquidsReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ReserveQuantitiesByTypeOfReserveAxis=srt_NaturalGasReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | srt_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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