Description of Business and Segmented Disclosures - Narrative (Detail)	9 Months Ended
Sep. 30, 2024 plant
Canadian Refining \| Downstream
Disclosure of operating segments [line items]
Number of ethanol plants	2

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

No definition available.

Name:	ifrs-full_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration