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Fair value of financial instruments (Narrative) (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disclosure of fair value measurement of assets [line items]
Fair value of warrants transferred from Level 3 to Level 1		$ 5.1
Level 3 [Member]
Disclosure of fair value measurement of assets [line items]
Sensitivity analysis, variance, percentage	10.00%	10.00%

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- Definition

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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- Definition

Represents amount of fair value of warrants transferred from Level three to Level 1.

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- Definition

Sensitivity analysis, variance, percentage

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