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Goodwill and Intangible Assets - Goodwill Allocated to CGUs (Details) $ in Millions | Dec. 31, 2022 CAD ($) | Jun. 01, 2022 cashGeneratingUnit | Dec. 31, 2021 CAD ($) | Dec. 31, 2020 CAD ($)
--- | --- | --- | --- | ---
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Number of cash generating units | cashGeneratingUnit |  | 2 |  |
Goodwill |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | $ 8,705 |  | $ 6,517 | $ 6,072
Canada | Goodwill |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 2,607 |  | 2,607 |
Group Benefits | Goodwill |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 1,132 |  | 1,108 |
Dental | Goodwill |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 2,232 |  | 0 |
Asia | Goodwill |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 700 |  | 659 |
Asset Management, MFS | Goodwill |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 513 |  | 483 |
Asset Management, SLC Management | Goodwill |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | 1,521 |  | 1,476 |
Corporate, UK | Goodwill |  |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |  |
Goodwill | $ 0 |  | $ 184 |

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