Expenses by Nature - Narrative (Details) - CAD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2022
Disclosure of products and services [line items]
Potential Disgorgement Of Revenue		$ 20
Potential Penalties And Fines		2
Fines and penalties		$ 33
Heartland Generation
Disclosure of products and services [line items]
Transaction costs	$ 24

The amount of acquisition-related costs for transactions recognised separately from the acquisition of assets and the assumption of liabilities in business combinations. [Refer: Total for all business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2024-01-01
-Paragraph B64
-Subparagraph m
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_m&doctype=Appendix&subtype=B
-URIDate 2024-03-27

Name:	ifrs-full_AcquisitionrelatedCostsForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration