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Segmented information - Disclosure of revenue information based on services provided by the Company (Details) - CAD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Disclosure of products and services [line items]
Revenue	$ 14,676,152	$ 14,296,360
Managed IT and business process services
Disclosure of products and services [line items]
Revenue	8,041,857	7,674,460
Business and strategic IT consulting and systems integration services
Disclosure of products and services [line items]
Revenue	$ 6,634,295	$ 6,621,900

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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 income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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