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Segmented Information - Segment Results by Geographical Area (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of operating segments [line items] |  |
Revenue | $ 35,688 | $ 43,337
Asset Management |  |
Disclosure of operating segments [line items] |  |
Revenue | 5,855 | 5,037
Asset Management | United States |  |
Disclosure of operating segments [line items] |  |
Revenue | 5,299 | 4,505
Asset Management | United Kingdom |  |
Disclosure of operating segments [line items] |  |
Revenue | 289 | 174
Asset Management | Canada |  |
Disclosure of operating segments [line items] |  |
Revenue | 233 | 311
Asset Management | Other countries |  |
Disclosure of operating segments [line items] |  |
Revenue | 34 | 47
Corporate |  |
Disclosure of operating segments [line items] |  |
Revenue | 258 | 980
Corporate | United States |  |
Disclosure of operating segments [line items] |  |
Revenue | 112 | 169
Corporate | United Kingdom |  |
Disclosure of operating segments [line items] |  |
Revenue | 74 | 725
Corporate | Canada |  |
Disclosure of operating segments [line items] |  |
Revenue | 75 | 79
Corporate | Other countries |  |
Disclosure of operating segments [line items] |  |
Revenue | $ (3) | $ 7

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