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Property, Plant and Equipment - Additional Information (Details) $ in Millions |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended | 20 Months Ended | 37 Months Ended | 44 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 07, 2019 CAD ($) | Mar. 07, 2019 USD ($) | Jul. 23, 2015 CAD ($) | Jul. 23, 2015 USD ($) | Sep. 30, 2018 CAD ($) | Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Jun. 30, 2019 USD ($) | Aug. 31, 2018 CAD ($) | Aug. 31, 2018 USD ($) | Mar. 07, 2019 USD ($)
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment |  |  |  |  |  |  | $ 0 | $ 0 |  | $ 3,800,000 |  |  |  |  |
Deposit on anticipated sale of real property |  |  | $ 15.0 | $ 11,200,000 |  |  |  |  |  |  |  |  |  |  |
Term of lease contract |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |  |
Toronto transition costs |  |  |  |  |  |  |  |  | $ 13,200,000 | $ 1,600,000 | $ 0 |  |  |  |
Key management personnel of entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales of property and other assets, related party transactions |  |  | $ 137.0 | $ 100,000,000 |  |  |  |  |  |  |  |  |  |  |
Deposit on anticipated sale of real property |  |  |  |  | $ 122.0 | $ 89,000,000 |  |  |  |  |  |  | $ 53.5 | $ 39,000,000 |
Percentage of interests in the Property Purchaser held by a Privately-held company |  |  |  |  |  |  |  |  | 27.00% |  |  |  |  |  |
Percentage of interest held |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |
Option to obtain non-voting interest in Assignee |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |
Sale of Property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposit on anticipated sale of real property |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 110,000,000
Sale of Property | Mortgages | Key management personnel of entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposit on anticipated sale of real property | $ 68.5 | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings maturity term, related party transactions | 2 years | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |
Building improvements and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Toronto transition costs |  |  |  |  |  |  |  |  | $ 15,000,000 |  |  |  |  |  |
Building improvements and equipment | Headquarters and manufacturing operations relocation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Toronto transition costs |  |  |  |  |  |  |  |  |  |  |  | $ 17,000,000 |  |  |

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