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Financial Instruments - Net (Gains) Losses from Risk Management Activities (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financial Instruments [Abstract]
Net realized risk management (gain) loss	$ (14)	$ (7)	$ 17
Net unrealized risk management loss (gain)	12	(28)	19
Gains (losses) on change in fair value of derivatives	$ (2)	$ (35)	$ 36

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- Definition

Financial Instruments [Abstract]

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No definition available.

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- Definition

Gain (Losses) On Change In Fair Value Of Settled Derivatives

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No definition available.

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- Definition

Gain (Losses) On Change In Fair Value Of Unsettled Derivatives

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No definition available.

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- Definition

The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_85&doctype=Standard
-URIDate 2023-03-23

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