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Financial Instruments and Risk Management - Financial Derivatives Marked-To-Market (Details) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financial Instruments [Abstract]
Realized financial derivatives loss (gain)	$ 184,241	$ (47,836)
Unrealized financial derivatives loss	103,631	18,500
Financial derivatives loss (gain)	$ 287,872	$ (29,336)

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Financial Instruments [Abstract]

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Realized Gain (Loss) On Financial Derivatives

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Unrealized and Realized Gain (Loss) on Financial Derivatives

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Adjustments for gains (losses) on changes in the fair value of derivatives to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: At fair value [member]; Derivatives [member]; Profit (loss)]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2021-01-01
-Paragraph 20
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-URIDate 2021-03-24

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