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Goodwill and Intangible Assets - Goodwill Acquired by Segment (Details) - Goodwill - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Reconciliation of changes in intangible assets and goodwill [abstract]
Beginning balance	$ 8,969	$ 8,705
Acquisitions		400
Disposition		(21)
Foreign exchange rate movements	488	(115)
Acquisitions	(1)
Ending balance	9,456	8,969
Canada
Reconciliation of changes in intangible assets and goodwill [abstract]
Beginning balance	2,748	2,607
Acquisitions		162
Disposition		(21)
Foreign exchange rate movements	0	0
Acquisitions	(1)
Ending balance	2,747	2,748
U.S.
Reconciliation of changes in intangible assets and goodwill [abstract]
Beginning balance	3,389	3,364
Acquisitions		104
Disposition		0
Foreign exchange rate movements	290	(79)
Acquisitions	0
Ending balance	3,679	3,389
Asset Management
Reconciliation of changes in intangible assets and goodwill [abstract]
Beginning balance	2,148	2,034
Acquisitions		134
Disposition		0
Foreign exchange rate movements	140	(20)
Acquisitions	0
Ending balance	2,288	2,148
Asia
Reconciliation of changes in intangible assets and goodwill [abstract]
Beginning balance	684	700
Acquisitions		0
Disposition		0
Foreign exchange rate movements	58	(16)
Acquisitions	0
Ending balance	$ 742	$ 684

X

- Definition

The increase in intangible assets and goodwill resulting from acquisitions through business combinations. [Refer: Total for all business combinations [member]; Intangible assets and goodwill]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Number 38
-IssueDate 2024-01-01
-Paragraph 118
-Subparagraph e
-Clause i
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- Definition

The decrease in intangible assets and goodwill resulting from disposals. [Refer: Intangible assets and goodwill]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Number 38
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The increase (decrease) in intangible assets and goodwill resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Intangible assets and goodwill]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Paragraph 118
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The amount of intangible assets and goodwill held by the entity. [Refer: Goodwill; Intangible assets other than goodwill]

+ References

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Acquisitions Through Business Combinations, Intangible Assets And Goodwill, Expense

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