The amount of assets, other than cash or cash equivalents, in subsidiaries or other businesses over which control is obtained or lost. [Refer: Total for all subsidiaries [member]]

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The amount of cash and cash equivalents in subsidiaries or other businesses over which control is obtained or lost. [Refer: Total for all subsidiaries [member]; Cash and cash equivalents]

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The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The gains (losses) on disposals of non-current assets. [Refer: Non-current assets]

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The cash inflow from disposal of oil and gas assets. [Refer: Oil and gas assets]

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The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Total for all joint ventures [member]]

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Divestiture (Details) $ in Millions, $ in Billions			3 Months Ended		9 Months Ended
Divestiture (Details) $ in Millions, $ in Billions	Sep. 30, 2025 CAD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2025 CAD ($)	Sep. 30, 2024 CAD ($)	Sep. 30, 2025 CAD ($)	Sep. 30, 2024 CAD ($)
Disclosure of analysis of single amount of discontinued operations [line items]
Before-tax gain on disposal			$ 106	$ 17	$ 109	$ 121
Deferred tax expense income	$ 315
WRB Refining LP
Disclosure of analysis of single amount of discontinued operations [line items]
Share of equity investment	50.00%	50.00%
Proceeds from disposal of oil and gas assets	$ 1,800	$ 1.3
Before-tax gain on disposal	106
Cash and cash equivalents in subsidiary or businesses acquired or disposed	3,000
Assets other than cash or cash equivalents in subsidiary or businesses acquired or disposed	$ (1,300)