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Remuneration of Directors and Senior Management (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Non-management directors
Disclosure of transactions between related parties [line items]
Fees earned and salary	$ 3	$ 3	$ 2
Senior management
Disclosure of transactions between related parties [line items]
Fees earned and salary	2	2	2
Common stock option based awards	11	13	12
Annual incentive plans	6	5	5
Long-term incentive plans	20	19	18
Total	$ 39	$ 39	$ 37

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- Definition

Key Management Personnel Compensation, Annual Incentive Plans

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- Definition

Key Management Personnel Compensation, Long-Term Share-Based Payment

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- Definition

Key Management Personnel Compensation, Options Issued

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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 compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

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- Definition

The amount of compensation to key management personnel in the form of short-term employee benefits. [Refer: Key management personnel of entity or parent [member]]

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