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Supplementary cash flow information - Interest and income taxes paid and received (Details) - CAD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flow Statement [Abstract]
Interest paid	$ 102,180	$ 130,570
Interest received	87,153	87,239
Income taxes paid	$ 740,325	$ 480,607

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- Definition

Cash Flows Statement [Abstract]

+ References

No definition available.

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- Definition

The cash flows from income taxes paid or refunded, classified as operating activities. [Refer: Income taxes paid (refund)]

+ References

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- Definition

The cash outflow for interest paid, classified as operating activities.

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- Definition

The cash inflow from interest received, classified as operating activities.

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