Accumulated other comprehensive income (Tables)

12 Months Ended

Sep. 30, 2025


	As at September 30, 2025	As at September 30, 2024
	$	$
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 $59,141 ($44,210 as at September 30, 2024)	1,588,980	896,259
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 $46,173 ($48,921 as at September 30, 2024)	(542,309)	(388,957)
Deferred gains of hedging on cross-currency swaps, net of accumulated income tax expense of $2,538 ($2,907 as at September 30, 2024)	17,130	19,031
Net unrealized losses on cash flow hedges, net of accumulated income tax recovery of $10,042 ($1,421 as at September 30, 2024)	(34,359)	(6,930)
Net unrealized gains on financial assets at fair value through other comprehensive income, net of accumulated income tax expense of $1,361 ($707 as at September 30, 2024)	4,328	2,447
Items that will not be reclassified subsequently to net earnings:
Net remeasurement losses on defined benefit plans, net of accumulated income tax recovery of $11,755 ($24,817 as at September 30, 2024)	(31,426)	(70,597)
	1,002,344	451,253