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Share Capital (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Equity Financing [Line Items] |  |
Stock Repurchased Authorization | 34,485,405 |
Shares repurchased and cancelled (in shares) | 0 | 1,100,000
Repurchased Shares Price Per Share |  | $ 7.41
Shares Repurchased |  | $ 8.2
Dividends recognised as distributions to owners |  | 35.1
Dividends paid | $ (35.3) | $ (35.1)
Top of range |  |
Equity Financing [Line Items] |  |
Discount rate on prevailing market price from treasury | 5.00% |
Restricted share units ("RSU") |  |
Equity Financing [Line Items] |  |
Weighted average exercise price of other equity instruments granted in share-based payment arrangement | $ 14.07 | $ 9.66
Deferred share units ("DSU") |  |
Equity Financing [Line Items] |  |
Weighted average exercise price of other equity instruments granted in share-based payment arrangement | 14.35 | 9.67
Performance share units ("PSU") |  |
Equity Financing [Line Items] |  |
Weighted average exercise price of other equity instruments granted in share-based payment arrangement | $ 14.10 | $ 9.65
SHARE CAPITAL |  |
Equity Financing [Line Items] |  |
Shares repurchased and cancelled (in shares) |  | 1,100,000
Issuance of shares related to Manitou acquisition (note 8) | $ 13.4 | $ 0.0
Dividend reinvestment plan and share purchase plan (in shares) | 353,084 | 527,770
DRIP (ii) | $ 4.1 | $ 4.1
Dividends recognised as distributions to owners |  | $ 4.1
Shares issued through share purchase plan (in shares) | 469,566 | 373,806
DEFICIT |  |
Equity Financing [Line Items] |  |
Dividends recognised as distributions to owners | $ 39.4 | $ 39.2

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