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Assets Held for Sale - Narrative (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investment [Line Items]
Proceeds on sale of Pioneer Pipeline	$ 0	$ 0	$ 128
Gain on sale of assets and other	$ 4	$ 52	$ 54

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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No definition available.

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- Definition

The gain on disposals of non-current assets. [Refer: Non-current assets]

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- Definition

The cash inflow from sales of long-term assets that the entity does not separately disclose in the same statement or note, classified as investing activities. [Refer: Assets]

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