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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Deductible temporary differences for which no deferred tax asset is recognised $ 77.2 $ 96.8
Unrecognized tax liabilities 50.1 $ 17.8
Canada [Member] | Non-capital losses carried forward    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised 59.7  
Mexico [Member] | Non-capital losses carried forward    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised 24.9  
United States [Member] | Non-capital losses carried forward    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised 19.4  
Turkey [Member] | Non-capital losses carried forward    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised $ 3.7