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Supplementary cash flow information - Financing activities (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Cash used in financing activities excluding equity |  |
Repayment of debt assumed in business acquisitions that occurred in prior year | $ (56,994) | $ (113,036)
Settlement of derivative financial instruments | 2,921 | 6,258
Non-cash financing activities |  |
Additions, disposals/retirements, change in estimates and lease modifications of right-of-use assets | 86,691 | 101,180
Long-term debt |  |
Financing activities |  |
Balance, beginning of year | 3,267,034 | 3,401,656
Cash used in financing activities excluding equity |  |
Increase of long-term debt | 948 | 0
Repayment of long-term debt and lease liabilities | (79,150) | (401,654)
Repayment of debt assumed in business acquisitions that occurred in prior year | (56,994) | (113,036)
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) | 0 | 162,640
Changes in foreign currency exchange rates | (38,218) | 207,561
Other | 6,701 | 9,867
Balance, end of year | 3,100,321 | 3,267,034
Derivative financial instruments to hedge long-term debt |  |
Financing activities |  |
Balance, beginning of year | (146,215) | 17,187
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 | 2,921 | 6,258
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 | 45,719 | (169,660)
Other | 0 | 0
Balance, end of year | (97,575) | (146,215)
Lease liabilities |  |
Financing activities |  |
Balance, beginning of year | 709,201 | 776,940
Cash used in financing activities excluding equity |  |
Increase of long-term debt | 0 | 0
Repayment of long-term debt and lease liabilities | (161,211) | (160,583)
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 | 81,656 | 95,547
Additions through business acquisitions (Note 27) | 0 | 23,181
Changes in foreign currency exchange rates | 15,997 | (25,153)
Other | (3,680) | (731)
Balance, end of year | $ 641,963 | $ 709,201

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