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Accumulated other comprehensive income (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021
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 $45,419 ($43,208 as at September 30, 2021) | $ 291,532 | $ 611,230
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 $43,936 ($41,611 as at September 30, 2021) | (271,690) | (267,149)
Deferred gains of hedging on cross-currency swaps, net of accumulated income tax expense of $4,664 ($2,369 as at September 30, 2021) | 28,274 | 6,569
Net unrealized gains on cash flow hedges, net of accumulated income tax expense of $10,398 $1,252 as at September 30, 2021) | 30,274 | 5,029
Net unrealized (losses) gains on financial assets at fair value through other comprehensive income, net of accumulated income tax recovery of $1,367 (net of accumulated income tax expense of $592 as at September 30, 2021) | (4,072) | 2,191
Items that will be reclassified subsequently to net earnings, tax portion: |  |
Net unrealized gains on translating financial statements of foreign operations, accumulated income tax expense (recovery) | 45,419 | 43,208
Net losses on cross-currency swaps and on translating long-term debt designated as hedges of net investments in foreign operations, accumulated income tax recovery | 43,936 | 41,611
Deferred gains of hedging on cross-currency swaps, accumulated income tax expense (recovery) | 4,664 | 2,369
Net unrealized gains on cash flow hedges, accumulated income tax expense (recovery) | 10,398 | 1,252
Net unrealized (losses) gains on financial assets at fair value through other comprehensive income, accumulated income tax (recovery) expense | (1,367) | 592
Items that will not be reclassified subsequently to net earnings: |  |
Net remeasurement losses on defined benefit plans, net of accumulated income tax recovery of $12,095 ($11,084 as at September 30, 2021) | (34,572) | (26,290)
Items that will not be reclassified subsequently to net earnings, tax portion: |  |
Net remeasurement losses on defined benefit plans, accumulated income tax recovery | 12,095 | 11,084
Accumulated other comprehensive income | 39,746 | 331,580
Net unrealized gains on cash flow hedges previously recognized in other comprehensive income, reclassified to net earnings | 4,151 | 412
Net unrealized gains on cash flow hedges previously recognized in other comprehensive income, reclassified to net earnings, income tax expense | 998 | (623)
Deferred costs of hedging on cross-currency swaps | 10,746 | 10,317
Reclassification adjustments on other comprehensive income (loss), deferred gains (cost) of hedging, tax | $ 3,876 | $ 3,719

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