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Amortization, depreciation and impairment (Tables) | 12 Months Ended
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Sep. 30, 2022
Analysis of income and expense [abstract] |
Disclosure of amortization, depreciation and impairment |
|  | Year ended September 30
|  | 2022 | 2021
|  | $ | $
Depreciation of PP&E (Note 6) |  | 133,651 |  | 144,423 |
Depreciation of right-of-use assets (Note 7) |  | 141,295 |  | 160,240 |
Impairment of right-of-use assets (Note 7) |  | 1,495 |  | 956 |
Amortization of contract costs related to transition costs |  | 48,594 |  | 61,369 |
Impairment of contract costs related to transition costs |  | — |  | 4,592 |
Amortization of intangible assets (Note 9) |  | 139,940 |  | 129,861 |
Impairment of intangible assets (Note 9) |  | 3,359 |  | 4,121 |
Included in costs of services, selling and administrative (Note 23) |  | 468,334 |  | 505,562 |
Amortization of contract costs related to incentives (presented as a reduction of revenue) |  | 2,201 |  | 2,611 |
Amortization of deferred financing fees (presented in finance costs) |  | 829 |  | 875 |
Amortization of premiums and discounts on investments related to funds held for clients (presented net as a reduction (increase) of revenue) |  | 37 |  | (102) |
Impairment of PP&E (presented in integration costs) (Note 6) |  | 858 |  | 1,113 |
Impairment of right-of-use assets (presented in integration costs) (Note 7) |  | 2,363 |  | 511 |
|  | 474,622 |  | 510,570 |

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