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Exchangeable Securities - Option To Exchange (Details) - Option to exchange – embedded derivative - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Disclosure of detailed information about borrowings [line items]
Base fair value	$ 0	$ 0
Minimum
Disclosure of detailed information about borrowings [line items]
Sensitivity	0	0
Maximum
Disclosure of detailed information about borrowings [line items]
Sensitivity	$ (30)	$ (25)

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Sensitivity Analysis For Option To Exchange Securities For Ownership, Reasonably Possible Change In Risk Variable, Amount

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Sensitivity Analysis For Option To Exchange Securities For Ownership, Reasonably Possible Change In Risk Variable, Percent

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