Goodwill (Details) $ in Millions	9 Months Ended
Sep. 30, 2023 CAD ($)
Goodwill [Roll Forward]
Beginning balance	$ 344
Additions (Note 8)	17,591
Foreign exchange impact	212
Ending balance	$ 18,147

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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