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Commitments, contingencies and guarantees - Guarantees (Details)	Sep. 30, 2023 CAD ($)
Disclosure of contingent liabilities [line items]
Letters of credit in addition to the letters of credit covered by the unsecured committed revolving credit facility	$ 75,888,000
Liability for refusal or failure to perform under bid and performance bonds | Guarantees
Disclosure of contingent liabilities [line items]
Estimated financial effect of guarantees	$ 34,323,000

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- Definition

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- Definition

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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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