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Segmented Information - Summary Of Detailed Information About Geographical Areas (Parenthetical) (Detail) - CAD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of geographical areas [line items]            
Revenue From Government Grants $ 0 $ 4,100   $ 16,400 $ 19,600 $ 0
Energy Infrastructure [Member]            
Disclosure of geographical areas [line items]            
Amounts reclassified between segments     $ 11,717     $ 43,594