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v3.25.3

Capital stock - Schedule of outstanding shares (Details) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2025 CAD ($) shares | Sep. 30, 2024 CAD ($) shares | Sep. 30, 2023 CAD ($) shares
Disclosure of classes of share capital [line items] |  |  |
Equity | $ 10,282,332,000 | $ 9,427,990,000 | $ 8,310,294,000
Purchased and held in trusts | $ (13,323,000) | $ (66,847,000) |
Issued upon exercise of stock options (in shares) | shares | 947,071 | 1,333,876 |
Issued upon exercise of stock options | $ 61,989,000 | $ 76,535,000 |
Capital stock |  |  |
Disclosure of classes of share capital [line items] |  |  |
Number of shares outstanding | shares | 220,062,749,000 | 227,896,921,000 | 233,160,203,000
Equity | $ 1,499,917,000 | $ 1,470,333,000 | $ 1,477,180,000
Release of Class A subordinate voting shares held in trusts (in shares) | shares | 0 | 0 |
Release of Class A subordinate voting shares held in trusts | $ 46,050,000 | $ 14,078,000 |
Purchased and held in trust (in shares) | shares | 0 | 0 |
Purchased and held in trusts | $ (13,323,000) | $ (66,847,000) |
Conversion of shares (in shares) | shares |  | 0 |
Conversion of shares |  | $ 0 |
Issued upon exercise of stock options (in shares) | shares | 947,071,000 | 1,333,876,000 |
Issued upon exercise of stock options | $ 74,319,000 | $ 91,800,000 |
Purchased and cancelled (in shares) | shares | (8,781,243,000) | (6,597,158,000) |
Purchased and cancelled | $ (77,462,000) | $ (45,878,000) |
Class A subordinate voting shares | Capital stock |  |  |
Disclosure of classes of share capital [line items] |  |  |
Number of shares outstanding | shares | 195,939,991,000 | 203,774,163,000 | 206,714,497,000
Equity | $ 1,466,264,000 | $ 1,436,680,000 | $ 1,440,286,000
Release of Class A subordinate voting shares held in trusts (in shares) | shares | 0 | 0 |
Release of Class A subordinate voting shares held in trusts | $ 46,050,000 | $ 14,078,000 |
Purchased and held in trust (in shares) | shares | 0 | 0 |
Purchased and held in trusts | $ (13,323,000) | $ (66,847,000) |
Conversion of shares (in shares) | shares |  | 2,322,948,000 |
Conversion of shares |  | $ 3,241,000 |
Issued upon exercise of stock options (in shares) | shares | 947,071,000 | 1,333,876,000 |
Issued upon exercise of stock options | $ 74,319,000 | $ 91,800,000 |
Purchased and cancelled (in shares) | shares | (8,781,243,000) | (6,597,158,000) |
Purchased and cancelled | $ (77,462,000) | $ (45,878,000) |
Class B shares (multiple voting) | Capital stock |  |  |
Disclosure of classes of share capital [line items] |  |  |
Number of shares outstanding | shares | 24,122,758,000 | 24,122,758,000 | 26,445,706,000
Equity | $ 33,653,000 | $ 33,653,000 | $ 36,894,000
Release of Class A subordinate voting shares held in trusts (in shares) | shares | 0 | 0 |
Release of Class A subordinate voting shares held in trusts | $ 0 | $ 0 |
Purchased and held in trust (in shares) | shares | 0 | 0 |
Purchased and held in trusts | $ 0 | $ 0 |
Conversion of shares (in shares) | shares |  | (2,322,948,000) |
Conversion of shares |  | $ (3,241,000) |
Issued upon exercise of stock options (in shares) | shares | 0 | 0 |
Issued upon exercise of stock options | $ 0 | $ 0 |
Purchased and cancelled (in shares) | shares | 0 | 0 |
Purchased and cancelled | $ 0 | $ 0 |

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