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v3.25.2

Post-employment benefit plans - Interest Cost (Details) - CAD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Disclosure of defined benefit plans [line items] |  |  |  |
Total net return on post-employment benefit plans | $ 26 | $ 17 | $ 51 | $ 33
DB pension |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Total net return on post-employment benefit plans | 33 | 25 | 66 | 49
OPEBs |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Total net return on post-employment benefit plans | $ (7) | $ (8) | $ (15) | $ (16)

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