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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2025
Fair Value Disclosures [Abstract] |
Schedule Of Fair Value, Assets And Liabilities Measured On Recurring Basis | Fair value changes and settlements for amounts related to risk management assets and liabilities are recognized in revenues and foreign exchange gains and losses according to their purpose.
As at December 31, 2025 |  | Level 1 Quoted Prices in Active Markets |  |  | Level 2 Other Observable Inputs |  |  | Level 3 Significant Unobservable Inputs |  |  | Total Fair Value |  |  | Netting (1) |  |  | Carrying Amount |
Risk Management Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets |  | $ | - |  |  | $ | 87 |  |  | $ | - |  |  | $ | 87 |  |  | $ | (1 | ) |  | $ | 86 |
Long-term assets |  |  | - |  |  |  | 3 |  |  |  | 1 |  |  |  | 4 |  |  |  | - |  |  |  | 4 |
Risk Management Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  | $ | - |  |  | $ | 3 |  |  | $ | - |  |  | $ | 3 |  |  |  | (1 | ) |  | $ | 2 |
Long-term liabilities |  |  | - |  |  |  | 13 |  |  |  | - |  |  |  | 13 |  |  |  | - |  |  |  | 13 |
As at December 31, 2024 |  | Level 1 Quoted Prices in Active Markets |  |  | Level 2 Other Observable Inputs |  |  | Level 3 Significant Unobservable Inputs |  |  | Total Fair Value |  |  | Netting (1) |  |  | Carrying Amount |
Risk Management Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets |  | $ | - |  |  | $ | 116 |  |  | $ | - |  |  | $ | 116 |  |  | $ | (6 | ) |  | $ | 110 |
Foreign Currency Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (2 | ) |  |  | (2 | )
Risk Management Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  | $ | - |  |  | $ | 26 |  |  | $ | - |  |  | $ | 26 |  |  | $ | (6 | ) |  | $ | 20 |
Long-term liabilities |  |  | - |  |  |  | 21 |  |  |  | - |  |  |  | 21 |  |  |  | - |  |  |  | 21 |
Foreign Currency Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  |  | - |  |  |  | 89 |  |  |  | - |  |  |  | 89 |  |  |  | (2 | ) |  |  | 87 |
(1) Netting to offset derivative assets and liabilities where the legal right and intention to offset exists, or where counterparty master netting arrangements contain provisions for net settlement.
Summary Of Changes In Level 3 Fair Value Measurements | A summary of changes in Level 3 fair value measurements for risk management positions is presented below:
|  |  |  |  |  | Risk Management |
|  |  |  |  |  | 2025 |  |  | 2024 |
Balance, Beginning of Year |  |  |  |  |  | $ | - |  |  | $ | 16 |
Total Gains (Losses) |  |  |  |  |  |  | 1 |  |  |  | 14 |
Purchases, Sales, Issuances and Settlements: |  |  |  |  |  |  |  |  |  |
Purchases, sales and issuances |  |  |  |  |  |  | - |  |  |  | - |
Settlements |  |  |  |  |  |  | - |  |  |  | 9 |
Transfers Out of Level 3 |  |  |  |  |  |  | - |  |  |  | (39 | )
Balance, End of Year |  |  |  |  |  | $ | 1 |  |  | $ | - |
Change in Unrealized Gains (Losses) During the |  |  |  |  |  |  |  |  |  |
Year Included in Net Earnings (Loss) |  |  |  |  |  | $ | 1 |  |  | $ | 23 |
Quantitative Information About Unobservable Inputs Used In Level 3 | Quantitative information about unobservable inputs used in Level 3 fair value measurements for risk management positions is presented below as at December 31, 2025:
|  | Valuation Technique |  | Unobservable Input |  | Range | Weighted Average |
Risk Management - Physical Forward Contract |  | Discounted Cash Flow Model |  | Forward Prices (1) |  | $0.65/Mcf - $2.58/Mcf |  | $1.14/Mcf |
(1) Forward prices refers to the differential between Chicago and AECO forward prices.

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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