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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, 2023	Sep. 30, 2022
Disclosure of products and services [line items]
Revenue	$ 14,296,360	$ 12,867,201
Managed IT and business process services
Disclosure of products and services [line items]
Revenue	7,674,460	6,980,988
Business and strategic IT consulting and systems integration services
Disclosure of products and services [line items]
Revenue	$ 6,621,900	$ 5,886,213

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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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