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v3.25.4

Supplementary Oil and Gas Information (Net Proved Reserves) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2025 MMBbls Bcf | Dec. 31, 2024 MMBbls Bcf | Dec. 31, 2023 MMBbls Bcf
Reserve Quantities [Line Items] |  |  |
Beginning of year | 2,057.1 | 2,185.9 | 2,273.6
Revisions and improved recovery | 198.2 | (217.9) | (309.6)
Extensions and discoveries | 138.9 | 300.1 | 285.3
Purchase of reserves in place | 311.8 | 4 | 243.9
Sale of reserves in place | (156.6) | (1) | (100.8)
Production | (224.3) | (214.1) | (206.5)
End of year | 2,325.1 | 2,057.1 | 2,185.9
Developed | 1,493.7 | 1,207.1 | 1,345.6
Undeveloped | 831.3 | 850 | 840.2
Oil [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | 580 | 518.9 | 535.3
Revisions and improved recovery | (29.8) | 2.9 | (134)
Extensions and discoveries | 19.6 | 118.3 | 64.7
Purchase of reserves in place | 33.3 | 1.8 | 160
Sale of reserves in place | (108.2) | (0.3) | (49.1)
Production | (52.1) | (61.5) | (58)
End of year | 442.7 | 580 | 518.9
Developed | 240.8 | 274 | 277.7
Undeveloped | 201.9 | 306 | 241.2
Natural Gas Liquids [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | 634.2 | 525.3 | 606.9
Revisions and improved recovery | 20.9 | 85.4 | (95.4)
Extensions and discoveries | 19.7 | 71.8 | 43.6
Purchase of reserves in place | 125.8 | 1 | 47.7
Sale of reserves in place | (14.9) | (0.4) | (28.9)
Production | (58.9) | (48.9) | (48.6)
End of year | 726.8 | 634.2 | 525.3
Developed | 470.5 | 396.1 | 353.7
Undeveloped | 256.4 | 238.2 | 171.6
Natural Gas [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | Bcf | 5,057 | 6,850 | 6,789
Revisions and improved recovery | Bcf | 1,243 | (1,837) | (482)
Extensions and discoveries | Bcf | 598 | 660 | 1,061
Purchase of reserves in place | Bcf | 916 | 7 | 218
Sale of reserves in place | Bcf | (201) | (2) | (137)
Production | Bcf | (680) | (621) | (599)
End of year | Bcf | 6,933 | 5,057 | 6,850
Developed | Bcf | 4,695 | 3,222 | 4,286
Undeveloped | Bcf | 2,238 | 1,835 | 2,565
United States [Member] | Oil [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | 579.8 | 518.8 | 535.2
Revisions and improved recovery | (29.9) | 2.9 | (134)
Extensions and discoveries | 19.6 | 118 | 64.7
Purchase of reserves in place | 33.3 | 1.8 | 160
Sale of reserves in place | (108.2) | (0.3) | (49.1)
Production | (52) | (61.4) | (58)
End of year | 442.5 | 579.8 | 518.8
Developed | 240.6 | 273.7 | 277.6
Undeveloped | 201.9 | 306 | 241.2
United States [Member] | Natural Gas Liquids [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | 534.5 | 378.4 | 457.8
Revisions and improved recovery | 10.1 | 129.1 | (89.1)
Extensions and discoveries | 13.6 | 58.2 | 23.3
Purchase of reserves in place | 24.3 | 1 | 46.6
Sale of reserves in place | (14.9) | (0.4) | (28.9)
Production | (31.9) | (31.8) | (31.2)
End of year | 535.8 | 534.5 | 378.4
Developed | 364.9 | 336.2 | 275.7
Undeveloped | 170.9 | 198.4 | 102.7
United States [Member] | Natural Gas [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | Bcf | 3,052 | 2,259 | 2,698
Revisions and improved recovery | Bcf | 190 | 639 | (460)
Extensions and discoveries | Bcf | 69 | 346 | 146
Purchase of reserves in place | Bcf | 119 | 6 | 201
Sale of reserves in place | Bcf | (201) | (2) | (137)
Production | Bcf | (188) | (197) | (189)
End of year | Bcf | 3,041 | 3,052 | 2,259
Developed | Bcf | 2,123 | 1,953 | 1,695
Undeveloped | Bcf | 919 | 1,099 | 564
Canada [Member] | Oil [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | 0.2 | 0.1 | 0.1
Revisions and improved recovery | 0.1 | 0.1 | 0
Extensions and discoveries | 0 | 0.3 | 0
Purchase of reserves in place | 0 | 0 | 0
Sale of reserves in place | 0 | 0 | 0
Production | (0.2) | (0.1) | 0
End of year | 0.2 | 0.2 | 0.1
Developed | 0.2 | 0.2 | 0.1
Undeveloped | 0 | 0 | 0
Canada [Member] | Natural Gas Liquids [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | 99.7 | 146.9 | 149
Revisions and improved recovery | 10.8 | (43.7) | (6.2)
Extensions and discoveries | 6.1 | 13.6 | 20.4
Purchase of reserves in place | 101.5 | 0 | 1.1
Sale of reserves in place | 0 | 0 | 0
Production | (27.1) | (17.1) | (17.4)
End of year | 191.1 | 99.7 | 146.9
Developed | 105.6 | 59.9 | 78
Undeveloped | 85.5 | 39.8 | 68.9
Canada [Member] | Natural Gas [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Beginning of year | Bcf | 2,005 | 4,591 | 4,090
Revisions and improved recovery | Bcf | 1,053 | (2,476) | (21)
Extensions and discoveries | Bcf | 529 | 315 | 916
Purchase of reserves in place | Bcf | 797 | 1 | 17
Sale of reserves in place | Bcf | 0 | 0 | 0
Production | Bcf | (492) | (425) | (411)
End of year | Bcf | 3,892 | 2,005 | 4,591
Developed | Bcf | 2,572 | 1,269 | 2,590
Undeveloped | Bcf | 1,319 | 736 | 2,000

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 -Name Form 20-F -Number Part II -Section Item 18 -Subparagraph (Instruction 2) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477916/932-235-55-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 6: 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/1943274/2147477215/932-235-50-5 + 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 -Number Part II -Section Item 18 -Subparagraph (Instruction 2) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477916/932-235-55-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 6: 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/1943274/2147477215/932-235-50-4 + Details
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- Definition Production of proved reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Form 20-F -Number Part II -Section Item 18 -Subparagraph (Instruction 2) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477916/932-235-55-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-5 + Details
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- Definition Purchase of minerals in place. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Form 20-F -Number Part II -Section Item 18 -Subparagraph (Instruction 2) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477916/932-235-55-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-5 + Details
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- 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 -Name Form 20-F -Number Part II -Section Item 18 -Subparagraph (Instruction 2) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477916/932-235-55-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-5 + Details
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- 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 -Name Form 20-F -Number Part II -Section Item 18 -Subparagraph (Instruction 2) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477916/932-235-55-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 6: 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/1943274/2147477215/932-235-50-4 + Details
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- 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 -Name Form 20-F -Number Part II -Section Item 18 -Subparagraph (Instruction 2) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477916/932-235-55-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-8 Reference 6: 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/1943274/2147477215/932-235-50-4 + Details
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