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Basis of Preparation and Significant Accounting Policies (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2019
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Land rights | $ 10.1 | $ 10.5 |  |
IFRS 16 |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Land rights |  |  |  | $ 113.0
Lease liabilities |  |  |  | $ 113.0
Options |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting period | 4 years |  |  |
RSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting period | 3 years |  |  |
PSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting period | 3 years |  |  |
Percentage of awards granted recorded based on market value of subordinate voting shares |  | 40.00% | 40.00% |
Award requisite service period | 3 years |  |  |
Percentage of awards granted recorded using Monte Carlo simulation model |  | 60.00% | 60.00% |
25% vested in year 1 | Options |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 25.00% |  |  |
25% vested in year 2 | Options |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 25.00% |  |  |
25% vested in year 3 | Options |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 25.00% |  |  |
25% vested in year 4 | Options |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 25.00% |  |  |
33.33% vested in year 1 | RSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 33.00% |  |  |
33.33% vested in year 2 | RSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 33.00% |  |  |
33.33% vested in year 3 | RSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 33.00% |  |  |
Bottom of range | PSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 0.00% |  |  |
Bottom of range | DSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Percentage of annual fees paid to Board of Directors paid in form of awards | 75.00% |  |  |
Top of range | PSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Vesting percentage | 200.00% |  |  |
Top of range | DSUs |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Percentage of annual fees paid to Board of Directors paid in form of awards | 100.00% |  |  |
Intellectual property | Bottom of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of intangible assets | 3 years |  |  |
Intellectual property | Top of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of intangible assets | 5 years |  |  |
Other intangible assets | Bottom of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of intangible assets | 4 years |  |  |
Other intangible assets | Top of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of intangible assets | 15 years |  |  |
Computer software assets | Bottom of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of intangible assets | 1 year |  |  |
Computer software assets | Top of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of intangible assets | 10 years |  |  |
Buildings |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of property, plant and equipment | 40 years |  |  |
Building/leasehold improvements | Top of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of property, plant and equipment | 40 years |  |  |
Machinery and equipment | Bottom of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of property, plant and equipment | 3 years |  |  |
Machinery and equipment | Top of range |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Useful life of property, plant and equipment | 15 years |  |  |

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