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Common Shares - Narrative (Details) - CAD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 19, 2025 | Dec. 09, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | May 27, 2024
Disclosure of classes of share capital [line items] |  |  |  |  |
Provision for repurchase of common shares under ASPP |  |  |  | $ 19 |
Dividends declared per share (in CAD per share) |  | $ 0.06 |  |  |
Declared After Quarter End Date |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Dividends declared per share (in CAD per share) | $ 0.065 |  |  |  |
NCIB Program |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Repurchase of maximum common shares (in shares) |  |  |  |  | 14,000,000
Common shares |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Provision for repurchase of common shares under ASPP |  |  | $ 0 | $ 19 |
Common shares | Shareholder Rights Plan | Minimum |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Common shares acquired, percentage |  |  | 20.00% |  |

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