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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

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- Definition

Amounts reclassified between segments.

+ References

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- Definition

The amount of income recognised in relation to government grants. [Refer: Government grants]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 20
-IssueDate 2021-01-01
-Paragraph 39
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=20&code=ifrs-tx-2021-en-r&anchor=para_39_b&doctype=Standard
-URIDate 2021-03-24

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