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Accounts receivable (Tables)
12 Months Ended
Sep. 30, 2022
Subclassifications of assets, liabilities and equities [abstract]  
Disclosure of accounts receivable
As at
September 30, 2022
As at
September 30, 2021
$ $
 Trade (Note 31)
1,106,187  938,417 
 R&D and other tax credits1
163,608  187,347 
 Other 93,750  105,688 
1,363,545  1,231,452 
1    R&D and other tax credits were related to government programs mainly in Canada, the United States, and France