Equity-accounted investees (Narrative) (Details) - CAD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Nov. 07, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2014 |
|
| Joint Venture Inkai LLP [Member] | ||||
| Disclosure of significant investments in associates [Line Items] | ||||
| Ownership interest in associates | 40.00% | 40.00% | ||
| Non-ownership interest in associate | 60.00% | |||
| Percent of joint venture results | 100.00% | |||
| Westinghouse Electric Company [Member] | ||||
| Disclosure of significant investments in associates [Line Items] | ||||
| Ownership stake | 49.00% | 49.00% | 49.00% | |
| Percent of optional ownership interest | 100.00% | 100.00% | ||
| Westinghouse Electric Company [Member] | Brookfield Renewable Partners [Member] | ||||
| Disclosure of significant investments in associates [Line Items] | ||||
| Ownership stake | 51.00% | |||
| Global Laser Enrichment LLC [Member] | ||||
| Disclosure of significant investments in associates [Line Items] | ||||
| Ownership interest in associates | 49.00% | |||
| Percent of optional ownership interest | 75.00% | |||
| Impairment loss | $ 183,615,000 | |||