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Segmented Information - Segment Assets and Liabilities by Geographical Area (Details) - CAD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of operating segments [line items] |  |
Total general fund assets | $ 180,229 | $ 168,765
Investments for account of segregated fund holders | 116,973 | 103,062
Asset Management |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 5,666 | 4,468
Investments for account of segregated fund holders | 0 | 0
Asset Management | United States |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 4,770 | 4,147
Asset Management | United Kingdom |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 145 | 0
Investments for account of segregated fund holders | 0 | 0
Asset Management | Canada |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 534 | 321
Asset Management | Other countries |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 217 | 0
Corporate |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 13,930 | 14,378
Investments for account of segregated fund holders | 11,026 | 10,513
Corporate | United States |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 2,329 | 2,550
Corporate | United Kingdom |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 8,210 | 8,274
Investments for account of segregated fund holders | 11,026 | 10,513
Corporate | Canada |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 3,202 | 3,384
Corporate | Other countries |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | $ 189 | $ 170

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