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Supplementary cash flow information - Financing activities (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Cash used in financing activities excluding equity |  |
Repayment of debt assumed in business acquisitions that occurred in prior year | $ (162,146) | $ (56,994)
Settlement of derivative financial instruments | 38,943 | 2,921
Non-cash financing activities |  |
Additions, disposals/retirements, change in estimates and lease modifications of right-of-use assets | 110,778 | 86,691
Long-term debt |  |
Financing activities |  |
Balance, beginning of year | 3,100,321 | 3,267,034
Cash used in financing activities excluding equity |  |
Increase of long-term debt | 747,073 | 948
Repayment of long-term debt and lease liabilities | (1,154,878) | (79,150)
Repayment of debt assumed in business acquisitions that occurred in prior year | (162,146) | (56,994)
Settlement of derivative financial instruments | 0 | 0
Non-cash financing activities |  |
Additions, disposals/retirements, change in estimates and lease modifications of right-of-use assets | 0 | 0
Additions through business acquisitions (Note 27) | 162,146 | 0
Changes in foreign currency exchange rates | (6,715) | (38,218)
Other | 2,507 | 6,701
Balance, end of year | 2,688,308 | 3,100,321
Derivative financial instruments to hedge long-term debt |  |
Financing activities |  |
Balance, beginning of year | (97,575) | (146,215)
Cash used in financing activities excluding equity |  |
Increase of long-term debt | 0 | 0
Repayment of long-term debt and lease liabilities | 0 | 0
Repayment of debt assumed in business acquisitions that occurred in prior year | 0 | 0
Settlement of derivative financial instruments | 38,943 | 2,921
Non-cash financing activities |  |
Additions, disposals/retirements, change in estimates and lease modifications of right-of-use assets | 0 | 0
Additions through business acquisitions (Note 27) | 0 | 0
Changes in foreign currency exchange rates | 68,132 | 45,719
Other | 0 | 0
Balance, end of year | 9,500 | (97,575)
Lease liabilities |  |
Financing activities |  |
Balance, beginning of year | 641,963 | 709,201
Cash used in financing activities excluding equity |  |
Increase of long-term debt | 0 | 0
Repayment of long-term debt and lease liabilities | (146,762) | (161,211)
Repayment of debt assumed in business acquisitions that occurred in prior year | 0 | 0
Settlement of derivative financial instruments | 0 | 0
Non-cash financing activities |  |
Additions, disposals/retirements, change in estimates and lease modifications of right-of-use assets | 110,778 | 81,656
Additions through business acquisitions (Note 27) | 2,341 | 0
Changes in foreign currency exchange rates | 18,914 | 15,997
Other | (7,139) | (3,680)
Balance, end of year | $ 620,095 | $ 641,963

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