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Share Capital (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Equity Financing [Line Items]    
Stock Repurchased Authorization 29,994,398  
Repurchased Shares Price Per Share $ 7.39 $ 4.89
Other loss (note 14) $ (7.2) $ (3.7)
Dividends recognised as distributions to owners   $ 23.9
Share capital [Member]    
Equity Financing [Line Items]    
Shares repurchased and cancelled (in shares) 1,583,562 1,133,561
Expected cash outflow on redemption or repurchase of puttable financial instruments $ 11.7  
Dividend reinvestment plan and share purchase plan (in shares) 656,473 1,186,205
Dividend reinvestment plan (ii) $ 4.6 $ 10.0
Shares Repurchased   5.5
Dividends recognised as distributions to owners   $ 1.7