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Related party transactions - Narrative (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Associates and Joint Arrangements
Disclosure of transactions between related parties [line items]
Recognized revenue, related parties	$ 10	$ 14
Incurred expenses, related parties	178	133
Master Trust Fund | Bell Canada
Disclosure of transactions between related parties [line items]
Recognized revenue, related parties	$ 13	$ 13

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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.

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The amount of revenue arising from the rendering of services in related party transactions. [Refer: Revenue; Related parties [member]]

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The amount of services received in related party transactions. [Refer: Related parties [member]]

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