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Share Capital and Warrants - Issued and Outstanding - Warrants (Details) - CAD ($) shares in Thousands, $ in Millions |  | 12 Months Ended
--- | --- | ---
Jun. 14, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Amount |  |  |
Purchased and Cancelled |  | $ (87) |
Common Share Warrants |  |  |
Number of Warrants |  |  |
Outstanding, beginning of year (in shares) |  | 7,625 | 55,720
Exercised (in shares) |  | (3,982) | (2,610)
Purchases and cancelled (in shares) | (45,500) | 0 | (45,485)
Outstanding, end of year (in shares) |  | 3,643 | 7,625
Amount |  |  |
Outstanding, Beginning of Year |  | $ 25 | $ 184
Issued Upon Exercise of Warrants |  | (13) | (8)
Purchased and Cancelled | $ (711) | 0 | (151)
Outstanding, End of Year |  | $ 12 | $ 25

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