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Property, Plant and Equipment - Additional Information (Detail) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 CAD ($) shares $ / shares | Dec. 31, 2020 CAD ($)
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Gains on disposals of assets | $ 9 | $ 12
Cathedral Energy Services Ltd [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Gains on disposals of assets | 1 |
Purchase price | 6 |
Cash Assistance For Growth And Expansion | $ 3 |
Issuance of common shares | shares | 13,400,000 |
Number of share warrant issued | shares | 2,000,000 |
Number of share warrant issued, per share | $ / shares | $ 0.60 |

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