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Supplementary cash flow information (Tables) | 12 Months Ended
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Sep. 30, 2024
Cash Flow Statement [Abstract] |
Disclosure of net change in non-cash working capital | Net change in non-cash working capital items and others is as follows for the years ended September 30:
|  | 2024 | 2023
|  | $ | $
Accounts receivable |  | 106,360 |  | (31,120) |
Work in progress |  | (8,999) |  | 76,554 |
Prepaid expenses and other assets |  | 4,466 |  | 3,547 |
Long-term financial assets |  | (24,423) |  | (9,911) |
Accounts payable and accrued liabilities |  | 22,151 |  | (130,172) |
Accrued compensation and employee-related liabilities |  | (27,689) |  | (57,644) |
Deferred revenue |  | 50,420 |  | 45,681 |
Income taxes |  | (98,207) |  | 105,577 |
Provisions |  | (594) |  | (10,129) |
Long-term liabilities |  | 33,540 |  | 18,893 |
Derivative financial instruments |  | 634 |  | (682) |
Retirement benefits obligations |  | 7,337 |  | 5,871 |
|  | 64,996 |  | 16,465 |
Disclosure of non-cash operating and investing activities | Non-cash operating and investing activities are as follows for the years ended September 30:
|  | 2024 | 2023
|  | $ | $
Operating activities |  |  |
Accounts receivable |  | (12) |  | — |
Accounts payable and accrued liabilities |  | 35,992 |  | 32,392 |
Provisions |  | 576 |  | 1,088 |
Other long-term liabilities |  | 13,524 |  | 4,768 |
|  | 50,080 |  | 38,248 |
Investing activities |  |  |
Purchase of PP&E |  | (11,158) |  | (14,374) |
Additions, disposals/retirements, change in estimates and lease modifications of right-of-use assets |  | (110,778) |  | (86,691) |
Additions to intangible assets |  | (40,908) |  | (28,944) |
|  | (162,844) |  | (130,009) |
Disclosure of financing activities | Changes arising from financing activities are as follows for the years ended September 30:
| 2024 | 2023
| Long-term debt | Derivative financial instruments to hedge long-term debt | Lease liabilities | Long-term debt | Derivative financial instruments to hedge long-term debt | Lease liabilities
| $ | $ | $ | $ | $ | $
Balance, beginning of year | 3,100,321 |  | (97,575) |  | 641,963 |  | 3,267,034 |  | (146,215) |  | 709,201 |
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) |  | — |  | (146,762) |  | (79,150) |  | — |  | (161,211) |
Repayment of debt assumed in business acquisitions that occurred in prior year | (162,146) |  | — |  | — |  | (56,994) |  | — |  | — |
Settlement of derivative financial instruments (Note 32) | — |  | 38,943 |  | — |  | — |  | 2,921 |  | — |
Non-cash financing activities |  |  |  |  |  |
Additions, disposals/retirements and change in estimates and lease modifications of right-of-use assets | — |  | — |  | 110,778 |  | — |  | — |  | 81,656 |
Additions through business acquisitions (Note 27) | 162,146 |  | — |  | 2,341 |  | — |  | — |  | — |
Changes in foreign currency exchange rates | (6,715) |  | 68,132 |  | 18,914 |  | (38,218) |  | 45,719 |  | 15,997 |
Other | 2,507 |  | — |  | (7,139) |  | 6,701 |  | — |  | (3,680) |
Balance, end of year | 2,688,308 |  | 9,500 |  | 620,095 |  | 3,100,321 |  | (97,575) |  | 641,963 |
Disclosure of interest and income taxes paid and received | Interest paid and received and income taxes paid are classified within operating activities and are as follows for the years ended September 30:
|  | 2024 | 2023
|  | $ | $
Interest paid |  | 102,180 |  | 130,570 |
Interest received |  | 87,153 |  | 87,239 |
Income taxes paid |  | 740,325 |  | 480,607 |

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