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Contract costs (Tables)

12 Months Ended

Sep. 30, 2025

Revenue From Contracts With Customers [Abstract]

Disclosure of contract costs


			As at September 30, 2025									As at September 30, 2024
			Cost			Accumulated amortization and impairment			Net carrying amount			Cost			Accumulated amortization and impairment			Net carrying amount
			$			$			$			$			$			$
Transition costs			690,012			323,563			366,449			610,971			274,243			336,728
Incentives			18,757			14,274			4,483			51,045			43,744			7,301
			708,769			337,837			370,932			662,016			317,987			344,029