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Debt and Capital Structure - Summary of Net Debt to Adjusted Funds Flow (Detail) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Borrowings [abstract]
Net Debt	$ 4,614	$ 5,060
Cash From (Used in) Operating Activities	9,235	7,388
Settlement of Decommissioning Liabilities	(234)	(222)
Net Change in Non-Cash Working Capital	1,305	(1,193)
Adjusted Funds Flow	$ 8,164	$ 8,803
Net Debt to Adjusted Funds Flow (times)	60.00%	60.00%

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Adjusted Funds Flow

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Increase (Decrease) in Working Capital, Operating Activities

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Net Debt To Adjusted Funds Flow

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Payments For Decommissioning, Restoration And Rehabilitation Costs

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The cash flows from (used in) operating activities, which are the principal revenue-producing activities of the entity and other activities that are not investing or financing activities, from continuing and discontinued operations. [Refer: Revenue]

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The amount of net debt of the entity.

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