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Share Capital and Warrants - Schedule of Paid in Surplus Includes Stock Based Compensation Expense (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of reserves within equity [line items] |  |
Beginning balance | $ 2,002 | $ 2,691
Stock-Based Compensation Expense | 126 | 97
Purchase of Common Shares Under NCIB | (966) | (688)
Preferred Shares Redeemed | (87) |
Common Shares Issued on Exercise of Stock Options | (16) | (12)
Ending balance | 944 | 2,002
NSRs and NCIB |  |
Disclosure of reserves within equity [line items] |  |
Stock-Based Compensation Expense | 11 | 11
Retained Earnings Prior to Ovintiv Split |  |
Disclosure of reserves within equity [line items] |  |
Beginning balance | 1,707 | 2,395
Purchase of Common Shares Under NCIB | (966) | (688)
Preferred Shares Redeemed | (87) |
Common Shares Issued on Exercise of Stock Options | 0 | 0
Ending balance | 654 | 1,707
Retained Earnings Prior to Ovintiv Split | NSRs and NCIB |  |
Disclosure of reserves within equity [line items] |  |
Stock-Based Compensation Expense | 0 | 0
Stock-Based Compensation |  |
Disclosure of reserves within equity [line items] |  |
Beginning balance | 295 | 296
Purchase of Common Shares Under NCIB | 0 | 0
Preferred Shares Redeemed | 0 |
Common Shares Issued on Exercise of Stock Options | (16) | (12)
Ending balance | 290 | 295
Stock-Based Compensation | NSRs and NCIB |  |
Disclosure of reserves within equity [line items] |  |
Stock-Based Compensation Expense | $ 11 | $ 11

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- Definition The amount received or receivable from the issuance of the entity's shares in excess of nominal value and amounts received from other transactions involving the entity's stock or stockholders. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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