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Consolidated Statements of Changes in Equity - USD ($) $ in Millions | Total | Share capital [Member] | Contributed Surplus [member] | Warrants [member] | Accumulated other comprehensive income (loss) [member] | Accumulated other comprehensive income (loss) [member] Equity securities [member] | Accumulated other comprehensive income (loss) [member] Currency hedging instruments [member] | Accumulated other comprehensive income (loss) [member] Fuel Hedging Instruments [Member] | Deficit [member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2017 |  | $ 3,691.7 | $ 89.5 | $ 4.0 |  | $ 7.0 | $ 6.0 | $ 0.0 | $ (1,117.0)
Changes in equity [abstract] |  |  |  |  |  |  |  |  |
Issuance of shares related to Richmont acquisition (note 5) |  | 0.0 |  |  |  |  |  |  |
Issuance of shares related to share-based compensation |  | 3.5 |  |  |  |  |  |  |
Issuance of shares related to exercise of warrants |  | 0.6 |  |  |  |  |  |  |
Issuance of shares through flow-through share agreements |  | 0.0 |  |  |  |  |  |  |
Share-based compensation |  |  | 7.2 |  |  |  |  |  |
Transfer from contributed surplus of share-based compensation redeemed |  | 9.4 | (9.4) |  |  |  |  |  |
Shares issued related to the merger (note x) |  |  | 0.0 |  |  |  |  |  |
Reclassification of expiration of warrants (note 11 (g)) |  |  | 0.0 |  |  |  |  |  |
Exercise of warrants |  |  |  | (0.2) |  |  |  |  |
Issuance of warrants |  |  |  | 0.1 |  |  |  |  |
Expiration of warrants (note 11 (g)) |  |  |  | 0.0 |  |  |  |  |
Realized gain on sale of equity securities, reclassified to deficit, net of tax (note 16) |  |  |  |  |  | (12.5) |  |  |
Unrealized (loss) gain - equity securities, net of taxes |  |  |  |  |  | (1.8) |  |  |
Unrealized (loss) gain on currency hedging instruments, net of taxes | $ (7.4) |  |  |  |  |  | (7.4) | (0.5) |
Dividends (note12(f)) |  |  |  |  |  |  |  |  | (7.8)
Repurchase and cancellation of common shares (note 11) |  |  |  |  |  |  |  |  | 0.0
Cancellation of unexchanged post-amalgamation shares |  | 0.0 |  |  |  |  |  |  | 0.0
Reclassification of realized gain on sale of equity securities, net of tax (note 16) |  |  |  |  |  |  |  |  | 12.5
Net (loss) earnings | (72.6) |  |  |  |  |  |  |  | (72.6)
Ending balance at Dec. 31, 2018 | 2,602.3 | 3,705.2 | 87.3 | 3.9 | $ (9.2) | (7.3) | (1.4) | (0.5) | (1,184.9)
Changes in equity [abstract] |  |  |  |  |  |  |  |  |
Issuance of shares related to Richmont acquisition (note 5) |  | (26.1) |  |  |  |  |  |  |
Issuance of shares related to share-based compensation |  | 7.0 |  |  |  |  |  |  |
Issuance of shares related to exercise of warrants |  | 0.0 |  |  |  |  |  |  |
Issuance of shares through flow-through share agreements |  | 5.9 |  |  |  |  |  |  |
Share-based compensation |  |  | 5.8 |  |  |  |  |  |
Transfer from contributed surplus of share-based compensation redeemed |  | 2.5 | (2.5) |  |  |  |  |  |
Shares issued related to the merger (note x) |  |  | (3.8) |  |  |  |  |  |
Reclassification of expiration of warrants (note 11 (g)) |  |  | 3.9 |  |  |  |  |  |
Exercise of warrants |  |  |  | 0.0 |  |  |  |  |
Issuance of warrants |  |  |  | 0.0 |  |  |  |  |
Expiration of warrants (note 11 (g)) |  |  |  | (3.9) |  |  |  |  |
Realized gain on sale of equity securities, reclassified to deficit, net of tax (note 16) |  |  |  |  |  | 0.0 |  |  |
Unrealized (loss) gain - equity securities, net of taxes |  |  |  |  |  | 2.5 |  |  |
Unrealized (loss) gain on currency hedging instruments, net of taxes | 6.0 |  |  |  |  |  | 6.0 | 0.5 |
Dividends (note12(f)) |  |  |  |  |  |  |  |  | (15.6)
Repurchase and cancellation of common shares (note 11) |  | (26.1) |  |  |  |  |  |  | 14.7
Cancellation of unexchanged post-amalgamation shares |  | (1.2) |  |  |  |  |  |  | (1.2)
Reclassification of realized gain on sale of equity securities, net of tax (note 16) |  |  |  |  |  |  |  |  | 0.0
Net (loss) earnings | 96.1 |  |  |  |  |  |  |  | 96.1
Ending balance at Dec. 31, 2019 | $ 2,695.3 | $ 3,693.3 | $ 90.7 | $ 0.0 | $ (0.2) | $ (4.8) | $ 4.6 | $ 0.0 | $ (1,088.5)

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