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v3.25.4

Supplementary Oil and Gas Information (Narrative) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 USD ($) Bcf MMBbls | Dec. 31, 2024 USD ($) MMBbls | Dec. 31, 2024 USD ($) Bcf | Dec. 31, 2023 MMBbls Bcf
Reserve Quantities [Line Items] |  |  |  |
Proved Developed and Undeveloped Reserves, Net, Period Increase (Decrease) | 268 | (128.8) |  | (87.7)
Proved Developed and Undeveloped Reserves, Production | 224.3 | 214.1 |  | 206.5
Revisions of previous estimates | 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
Capitalized Costs of Unproved Properties Excluded from Amortization, Cumulative | $ | $ 434 | $ 764 | $ 764 |
Permian and Montney Assets [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Anticipated Timing of Inclusion of Costs In Amortization base, In Years | 3 years |  |  |
Proved Developed [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Sale of reserves in place | 156.6 |  |  | 100.8
Natural Gas [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Proved Developed and Undeveloped Reserves, Production | Bcf | 680 |  | 621 | 599
Revisions of previous estimates | 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
Change Due to Change in Approved Development Plan [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Revisions of previous estimates | 193.8 |  |  | (330)
Change Due to Change in Approved Development Plan [Member] | Oil and NGLs [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Revisions of previous estimates |  | (17.9) |  |
Change Due to Change in Approved Development Plan [Member] | Natural Gas [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Revisions of previous estimates |  | (39.8) | (239) |
Change Due To Changes In Prices [Member] | Oil and NGLs [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Revisions of previous estimates | 88.8 | 27.1 |  |
Change Due To Changes In Prices [Member] | Natural Gas [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Revisions of previous estimates |  | (319.1) | (1,914) |
Change Due To Change In Other Than Prices [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Revisions of previous estimates | 93.2 | 97.5 |  | 9.2
Change Due To Change In Other Than Prices [Member] | Natural Gas [Member] |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Revisions of previous estimates |  | 52.7 | 316 |

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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 -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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