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Recent Accounting Pronouncements and Changes to Accounting Policies - Consolidated Statements of Cash Flows (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items] |  |  |
Net income | $ 361.5 | $ 316.5 | [1]
Deferred income taxes | (42.4) | (50.4) | [1]
Trade and other payables and other accruals | (59.6) | (59.6) | [1]
Net cash flows from operating activities | 603.1 | 520.0 | [1]
Repayment of notes payable and other financing obligations | (101.1) | (27.7) | [1]
Net cash flows used in financing activities | $ (152.1) | (109.3) | [1]
Previously stated |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Net income |  | 331.2 |
Deferred income taxes |  | (45.6) |
Trade and other payables and other accruals |  | (54.4) |
Net cash flows from operating activities |  | 544.7 |
Repayment of notes payable and other financing obligations |  | (52.4) |
Net cash flows used in financing activities |  | (134.0) |
Increase (Decrease) |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Net income |  | (14.7) |
Deferred income taxes |  | (4.8) |
Trade and other payables and other accruals |  | (5.2) |
Net cash flows from operating activities |  | (24.7) |
Repayment of notes payable and other financing obligations |  | 24.7 |
Net cash flows used in financing activities |  | $ 24.7 |
[1] | Revised for change in accounting policy (see Note 6.c)

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