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Basis of Preparation and Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2017
Buildings |
Disclosure of detailed information about intangible assets [line items] |
Useful life of property, plant and equipment | 25 years
Bottom of range | Machinery and equipment |
Disclosure of detailed information about intangible assets [line items] |
Useful life of property, plant and equipment | 3 years
Bottom of range | Intellectual property |
Disclosure of detailed information about intangible assets [line items] |
Useful life of intangible assets | 3 years
Bottom of range | Other intangible assets |
Disclosure of detailed information about intangible assets [line items] |
Useful life of intangible assets | 4 years
Bottom of range | Computer software assets |
Disclosure of detailed information about intangible assets [line items] |
Useful life of intangible assets | 1 year
Top of range | Building/leasehold improvements |
Disclosure of detailed information about intangible assets [line items] |
Useful life of property, plant and equipment | 25 years
Top of range | Machinery and equipment |
Disclosure of detailed information about intangible assets [line items] |
Useful life of property, plant and equipment | 10 years
Top of range | Intellectual property |
Disclosure of detailed information about intangible assets [line items] |
Useful life of intangible assets | 5 years
Top of range | Other intangible assets |
Disclosure of detailed information about intangible assets [line items] |
Useful life of intangible assets | 10 years
Top of range | Computer software assets |
Disclosure of detailed information about intangible assets [line items] |
Useful life of intangible assets | 10 years
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%
Award requisite service period | 3 years
Percentage of awards granted recorded using Monte Carlo simulation model | 60.00%
DSUs | Bottom of range |
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%
DSUs | Top of range |
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%
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%

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