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Goodwill - Narrative (Details) - CAD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Disclosure of reconciliation of changes in goodwill [line items]
Impairment loss recognised in profit or loss, goodwill	$ 1,132,000,000
Explanation of period over which management has projected cash flows, period		5 years
Bell Media
Disclosure of reconciliation of changes in goodwill [line items]
Impairment loss recognised in profit or loss, goodwill	$ 1,132,000,000		$ 0

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Explanation Of Period Over Which Management Has Projected Cash Flows, Period

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The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2024-01-01
-Paragraph B67
-Subparagraph d
-Clause v
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-URIDate 2024-03-27

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