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Debt and Capital Structure - Schedule of Short-Term Borrowings (Detail) - CAD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Disclosure of detailed information about borrowings [line items]
Uncommitted demand facilities	$ 0	$ 0
Total Debt Principal	0	79
WRB Refining LP
Disclosure of detailed information about borrowings [line items]
Uncommitted demand facilities	0	79
Sunrise Oil Sands Partnership
Disclosure of detailed information about borrowings [line items]
Uncommitted demand facilities	$ 0	$ 0

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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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- Definition

The amount of current borrowings. [Refer: Borrowings]

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- Definition

The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

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