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Accumulated other comprehensive income (Tables) | 12 Months Ended
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Sep. 30, 2023
Disclosure of analysis of other comprehensive income by item [abstract] |
Schedule of accumulated other comprehensive income |
| As at September 30, 2023 | As at September 30, 2022
| $ | $
Items that will be reclassified subsequently to net earnings: |  |
Net unrealized gains on translating financial statements of foreign operations, net of accumulated income tax expense of $44,867 ($45,419 as at September 30, 2022) | 534,321 |  | 291,532 |
Net losses on cross-currency swaps and on translating long-term debt designated as hedges of net investments in foreign operations, net of accumulated income tax recovery of $49,991 ($43,936 as at September 30, 2022) | (325,649) |  | (271,690) |
Deferred gains of hedging on cross-currency swaps, net of accumulated income tax expense of $1,754 ($4,664 as at September 30, 2022) | 13,541 |  | 28,274 |
Net unrealized gains on cash flow hedges, net of accumulated income tax expense of $3,953 ($10,398 as at September 30, 2022) | 11,524 |  | 30,274 |
Net unrealized losses on financial assets at fair value through other comprehensive income, net of accumulated income tax recovery of $1,189 (net of accumulated income tax expense of $1,367 as at September 30, 2022) | (3,412) |  | (4,072) |
Items that will not be reclassified subsequently to net earnings: |  |
Net remeasurement losses on defined benefit plans, net of accumulated income tax recovery of $25,173 ($12,095 as at September 30, 2022) | (71,350) |  | (34,572) |
| 158,975 |  | 39,746 |

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- Definition The entire disclosure of the analysis of other comprehensive income by item. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 106A -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_106A&doctype=Standard -URIDate 2023-03-23 + Details
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