Related party transactions (Details) - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of transactions between related parties [line items] | ||
| Administrative, legal and technical expenses | $ 0.5 | $ 1.4 |
| Due from Associates | 0.0 | 0.0 |
| Due to Associates | 0.0 | 0.1 |
| Donation made | $ 0.2 | $ 0.1 |
| Double Zero Capital LP | ||
| Disclosure of transactions between related parties [line items] | ||
| Ownership percentage held an interest | 15.90% | 0.00% |
| OR Royalties, Inc. | ||
| Disclosure of transactions between related parties [line items] | ||
| Ownership percentage held an interest | 13.10% | 24.40% |