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Basis of financial statement preparation	9 Months Ended
	Sep. 30, 2025
Accounting Policies [Abstract]
Basis of financial statement preparation	Basis of financial statement preparation These unaudited consolidated financial statements have been prepared in accordance with United States Generally Accepted Accounting Principles (GAAP) and follow the same accounting policies and methods of computation as, and should be read in conjunction with, the most recent annual consolidated financial statements filed with the U.S. Securities and Exchange Commission (SEC) in the company’s 2024 annual report on Form 10-K. In the opinion of the company, the information furnished herein reflects all known accruals and adjustments necessary for a fair statement of the results for the periods reported herein. All such adjustments are of a normal recurring nature. The company’s exploration and production activities are accounted for under the “successful efforts” method. Amounts for related party revenues and purchases for the three months ended September 30, 2024 have been revised from $2,999 million to $3,755 million and from $1,199 million to $1,955 million, respectively. Amounts for related party revenues and purchases for the nine months ended September 30, 2024 have been revised from $8,674 million to $10,829 million and from $3,022 million to $5,177 million, respectively. Impacts of the revision offset to zero. The results for the nine months ended September 30, 2025, are not necessarily indicative of the operations to be expected for the full year. All amounts are in Canadian dollars unless otherwise indicated.

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No definition available.

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- Definition

The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Accounting policies describe all significant accounting policies of the reporting entity.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483426/235-10-50-1

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