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Supplemental Oil and Gas Information (Unaudited) - Summary of Proved Reserves Based on Average Prices (Details) MMcf in Millions, MMBbls in Millions, ft³ in Billions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 MMBbls ft³ | Dec. 31, 2023 ft³ MMBbls | Dec. 31, 2022 MMBbls ft³ MMcf | Dec. 31, 2021 ft³ MMBbls | Dec. 31, 2020 ft³ MMBbls
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed reserves | 425.5 | 425.5 | 436.0 | 419.2 | 410.8
Proved undeveloped reserves | 314.0 | 314.0 | 279.4 | 297.7 | 304.1
Crude Oil |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | 715.4 |  | 716.9 | 714.9 |
Revisions of previous estimates | (13.3) |  | (23.6) | (52.9) |
Improved recovery | 0.4 |  | 5.3 |  |
Extensions and discoveries | 112.6 |  | 80.1 | 109.4 |
Purchases of properties |  |  | 5.0 | 7.4 |
Sales of properties | (5.2) |  | (4.4) | (0.7) |
Production | (70.4) |  | (63.9) | (61.1) |
Proved developed and undeveloped reserves, ending balance | 739.5 |  | 715.4 | 716.9 |
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 | 303.6 |  | 291.5 | 266.5 |
Revisions of previous estimates | (10.8) |  | 23.4 | 39.3 |
Improved recovery | 0.4 |  | 4.7 |  |
Extensions and discoveries | 22.5 |  | 18.9 | 14.1 |
Purchases of properties |  |  | 4.2 | 6.4 |
Sales of properties | (2.0) |  | (3.6) |  |
Production | (37.9) |  | (35.5) | (34.9) |
Proved developed and undeveloped reserves, ending balance | 275.8 |  | 303.6 | 291.5 |
Proved developed reserves | 186.3 | 186.3 | 209.0 | 191.5 | 179.8
Proved undeveloped reserves | 89.5 | 89.5 | 94.6 | 99.9 | 86.7
Net natural gas liquids revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | 41.7 |  | 38.4 | 38.2 |
Revisions of previous estimates | (1.4) |  | 4.4 | 1.4 |
Improved recovery |  |  | 0.2 |  |
Extensions and discoveries | 2.0 |  | 2.5 | 2.5 |
Purchases of properties |  |  | 0.3 | 0.1 |
Sales of properties | (0.6) |  | (0.2) |  |
Production | (4.1) |  | (3.9) | (3.8) |
Proved developed and undeveloped reserves, ending balance | 37.6 |  | 41.7 | 38.4 |
Proved developed reserves | 25.9 | 25.9 | 29.7 | 28.4 | 28.7
Proved undeveloped reserves | 11.7 | 11.7 | 12.0 | 10.0 | 9.5
Net natural gas revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | ft³ |  | 2,219.9 | 2,322.3 | 2,461.0 |
Revisions of previous estimates | ft³ |  | (6.9) | (309.8) | (562.1) |
Improved recovery | ft³ |  |  | 2.6 |  |
Extensions and discoveries | ft³ |  | 528.9 | 352.4 | 556.7 |
Purchases of properties | ft³ |  |  | 2.9 | 5.4 |
Sales of properties |  | (15.6) | (3,600.0) | (4.4) |
Production | ft³ |  | (170.1) | (146.9) | (134.2) |
Proved developed and undeveloped reserves, ending balance | ft³ |  | 2,556.2 | 2,219.9 | 2,322.3 |
Proved developed reserves | ft³ | 1,279.3 | 1,279.3 | 1,183.1 | 1,196.0 | 1,213.8
Proved undeveloped reserves | ft³ | 1,276.9 | 1,276.9 | 1,036.8 | 1,126.4 | 1,247.2
MP Gulf of Mexico LLC |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped reserves, ending balance | 15.5 |  |  |  |
Proved developed reserves | 12.8 | 12.8 |  |  |
Proved undeveloped reserves | 2.7 | 2.7 |  |  |
MP Gulf of Mexico LLC | Net crude oil and condensate revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped reserves, ending balance | 14.0 |  |  |  |
Proved developed reserves | 11.7 | 11.7 |  |  |
Proved undeveloped reserves | 2.3 | 2.3 |  |  |
MP Gulf of Mexico LLC | Net natural gas liquids revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped reserves, ending balance | 0.6 | 1.2 |  |  |
Proved developed reserves | 0.5 | 0.5 |  |  |
Proved undeveloped reserves | 0.1 | 0.1 |  |  |
MP Gulf of Mexico LLC | Net natural gas revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped reserves, ending balance | ft³ |  | 5.3 |  |  |
Proved developed reserves | ft³ | 3.8 | 3.8 |  |  |
Proved undeveloped reserves | ft³ | 1.5 | 1.5 |  |  |
U.S. |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed reserves | 223.2 | 223.2 | 264.2 | 241.9 | 230.3
Proved undeveloped reserves | 87.9 | 87.9 | 92.8 | 101.6 | 98.2
U.S. | Crude Oil |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | 357.0 |  | 343.4 | 328.5 |
Revisions of previous estimates | (13.3) |  | 29.0 | 35.6 |
Improved recovery |  |  | 5.3 |  |
Extensions and discoveries | 12.7 |  | 20.6 | 18.2 |
Purchases of properties |  |  | 5.0 | 1.6 |
Sales of properties | 0.0 |  | (4.4) | 0.0 |
Production | (45.3) |  | (41.9) | (40.4) |
Proved developed and undeveloped reserves, ending balance | 311.1 |  | 357.0 | 343.4 |
U.S. | 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 | 263.6 |  | 255.0 | 240.6 |
Revisions of previous estimates | (8.9) |  | 19.9 | 31.1 |
Improved recovery | 0.0 |  | 4.7 |  |
Extensions and discoveries | 8.9 |  | 16.1 | 13.5 |
Purchases of properties |  |  | 4.2 | 1.3 |
Sales of properties | 0.0 |  | (3.6) |  |
Production | (35.6) |  | (32.7) | (31.5) |
Proved developed and undeveloped reserves, ending balance | 228.0 |  | 263.6 | 255.0 |
Proved developed reserves | 163.7 | 163.7 | 194.4 | 174.9 | 161.4
Proved undeveloped reserves | 64.3 | 64.3 | 69.2 | 80.0 | 79.2
U.S. | Net natural gas liquids revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | 37.6 |  | 35.1 | 34.6 |
Revisions of previous estimates | (1.2) |  | 3.9 | 1.4 |
Improved recovery |  |  | 0.2 |  |
Extensions and discoveries | 1.7 |  | 1.9 | 2.4 |
Purchases of properties |  |  | 0.3 | 0.1 |
Sales of properties | 0.0 |  | (0.2) |  |
Production | (3.8) |  | (3.6) | (3.4) |
Proved developed and undeveloped reserves, ending balance | 34.3 | 71.3 | 37.6 | 35.1 |
Proved developed reserves | 24.1 | 24.1 | 27.4 | 25.6 | 25.5
Proved undeveloped reserves | 10.2 | 10.2 | 10.2 | 9.5 | 9.1
U.S. | Net natural gas revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | ft³ |  | 334.9 | 320.3 | 319.5 |
Revisions of previous estimates | ft³ |  | (19.0) | 30.7 | 18.7 |
Improved recovery | ft³ |  |  | 2.6 |  |
Extensions and discoveries | ft³ |  | 12.3 | 15.7 | 13.5 |
Purchases of properties | ft³ |  |  | 2.9 | 1.5 |
Sales of properties |  | 0.0 | (3,600.0) | 0.0 |
Production | ft³ |  | (35.1) | (33.7) | (32.8) |
Proved developed and undeveloped reserves, ending balance | ft³ |  | 293.1 | 334.9 | 320.3 |
Proved developed reserves | ft³ | 212.4 | 212.4 | 254.1 | 248.1 | 260.2
Proved undeveloped reserves | ft³ | 80.7 | 80.7 | 80.8 | 72.2 | 59.3
Canada |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed reserves | 202.0 | 202.0 | 171.3 | 176.8 | 180.5
Proved undeveloped reserves | 213.5 | 213.5 | 186.5 | 196.0 | 205.9
Canada | Crude Oil |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | 357.8 |  | 372.8 | 386.4 |
Revisions of previous estimates | 0.2 |  | (52.8) | (89.3) |
Improved recovery | 0.4 |  | 0.0 |  |
Extensions and discoveries | 87.3 |  | 59.5 | 91.3 |
Purchases of properties |  |  | 0.0 | 5.8 |
Sales of properties | (5.2) |  | 0.0 | (0.7) |
Production | (25.0) |  | (21.7) | (20.6) |
Proved developed and undeveloped reserves, ending balance | 415.5 |  | 357.8 | 372.8 |
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 | 39.5 |  | 35.9 | 25.9 |
Revisions of previous estimates | (1.8) |  | 3.3 | 7.5 |
Improved recovery | 0.4 |  | 0.0 |  |
Extensions and discoveries | 1.5 |  | 2.8 | 0.6 |
Purchases of properties |  |  | 0.0 | 5.2 |
Sales of properties | (2.0) |  | 0.0 |  |
Production | (2.2) |  | (2.5) | (3.3) |
Proved developed and undeveloped reserves, ending balance | 35.4 |  | 39.5 | 35.9 |
Proved developed reserves | 22.3 | 22.3 | 14.2 | 16.0 | 18.4
Proved undeveloped reserves | 13.1 | 13.1 | 25.3 | 19.8 | 7.5
Canada | Net natural gas liquids revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | 4.1 |  | 3.3 | 3.6 |
Revisions of previous estimates | (0.2) |  | 0.5 | 0.0 |
Improved recovery |  |  | 0.0 |  |
Extensions and discoveries | 0.3 |  | 0.6 | 0.1 |
Purchases of properties |  |  | 0.0 | 0.0 |
Sales of properties | (0.6) |  | 0.0 |  |
Production | (0.3) |  | (0.3) | (0.4) |
Proved developed and undeveloped reserves, ending balance | 3.3 | 41.9 | 4.1 | 3.3 |
Proved developed reserves | 1.8 | 1.8 | 2.3 | 2.8 | 3.2
Proved undeveloped reserves | 1.5 | 1.5 | 1.8 | 0.5 | 0.4
Canada | Net natural gas revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | ft³ |  | 1,884.8 | 2,001.8 | 2,141.5 |
Revisions of previous estimates | ft³ |  | 12.1 | (340.5) | (581.0) |
Improved recovery | ft³ |  |  | 0.0 |  |
Extensions and discoveries | ft³ |  | 513.8 | 336.7 | 543.2 |
Purchases of properties | ft³ |  |  | 0.0 | 3.9 |
Sales of properties |  | (15.6) | 0.0 | (4.4) |
Production | ft³ |  | (135.0) | (113.2) | (101.4) |
Proved developed and undeveloped reserves, ending balance | ft³ |  | 2,260.1 | 1,884.8 | 2,001.8 |
Proved developed reserves | ft³ | 1,066.7 | 1,066.7 | 928.8 | 947.7 | 953.6
Proved undeveloped reserves | ft³ | 1,193.4 | 1,193.4 | 956.0 | 1,054.1 | 1,187.9
Other |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed reserves | 0.3 | 0.3 | 0.5 | 0.6 | 0.0
Proved undeveloped reserves | 12.6 | 12.6 | 0.1 | 0.1 | 0.0
Other | Crude Oil |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | 0.6 |  | 0.7 | 0.0 |
Revisions of previous estimates | (0.2) |  | 0.2 | 0.8 |
Improved recovery | 0.0 |  | 0.0 |  |
Extensions and discoveries | 12.6 |  | 0.0 | 0.0 |
Purchases of properties |  |  | 0.0 | 0.0 |
Sales of properties | 0.0 |  | 0.0 | 0.0 |
Production | (0.1) |  | (0.3) | (0.1) |
Proved developed and undeveloped reserves, ending balance | 12.9 |  | 0.6 | 0.7 |
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 | 0.5 |  | 0.6 | 0.0 |
Revisions of previous estimates | (0.1) |  | 0.2 | 0.7 |
Improved recovery | 0.0 |  | 0.0 |  |
Extensions and discoveries | 12.1 |  | 0.0 | 0.0 |
Purchases of properties |  |  | 0.0 | 0.0 |
Sales of properties | 0.0 |  | 0.0 |  |
Production | (0.1) |  | (0.3) | (0.1) |
Proved developed and undeveloped reserves, ending balance | 12.4 |  | 0.5 | 0.6 |
Proved developed reserves | 0.3 | 0.3 | 0.4 | 0.5 | 0.0
Proved undeveloped reserves | 12.1 | 12.1 | 0.1 | 0.1 | 0.0
Other | Net natural gas liquids revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | 0.0 |  | 0.0 | 0.0 |
Revisions of previous estimates | 0.0 |  | 0.0 | 0.0 |
Improved recovery |  |  | 0.0 |  |
Extensions and discoveries | 0.0 |  | 0.0 | 0.0 |
Purchases of properties |  |  | 0.0 | 0.0 |
Sales of properties | 0.0 |  | 0.0 |  |
Production | 0.0 |  | 0.0 | 0.0 |
Proved developed and undeveloped reserves, ending balance | 0.0 | 2.8 | 0.0 | 0.0 |
Proved developed reserves | 0.0 | 0.0 | 0.0 | 0.0 | 0.0
Proved undeveloped reserves | 0.0 | 0.0 | 0.0 | 0.0 | 0.0
Other | Net natural gas revenue |  |  |  |  |
Proved developed and undeveloped oil reserves: |  |  |  |  |
Proved developed and undeveloped crude oil/synthetic oil reserves, beginning balance | ft³ |  | 0.2 | 0.2 | 0.0 |
Revisions of previous estimates | ft³ |  | 0.0 | 0.0 | 0.2 |
Improved recovery | ft³ |  |  | 0.0 |  |
Extensions and discoveries | ft³ |  | 2.8 | 0.0 | 0.0 |
Purchases of properties | ft³ |  |  | 0.0 | 0.0 |
Sales of properties |  | 0.0 | 0.0 | 0.0 |
Production | ft³ |  | 0.0 | 0.0 | 0.0 |
Proved developed and undeveloped reserves, ending balance | ft³ |  | 3.0 | 0.2 | 0.2 |
Proved developed reserves | ft³ | 0.2 | 0.2 | 0.2 | 0.2 | 0.0
Proved undeveloped reserves | ft³ | 2.8 | 2.8 | 0.0 | 0.0 | 0.0

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- 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 -Name Form 20-F -Section Item 18 -Subsection Instruction 2 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-5 + Details
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- 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 -Name Form 20-F -Section Item 18 -Subsection Instruction 2 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-4 + Details
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