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Segmented Information - Segment Assets and Liabilities by Geographical Area (Details) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of operating segments [line items] |  |
Total general fund assets | $ 168,765 | $ 162,720
Investments for account of segregated fund holders | 103,062 | 106,392
SLF Asset Management |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 4,468 | 4,115
Investments for account of segregated fund holders | 0 | 0
SLF Asset Management | United States |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 4,147 | 3,750
SLF Asset Management | United Kingdom |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 0 | 0
Investments for account of segregated fund holders | 0 | 0
SLF Asset Management | Canada |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 321 | 365
SLF Asset Management | Other countries |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 0 | 0
Corporate |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 14,378 | 14,605
Investments for account of segregated fund holders | 10,513 | 11,986
Corporate | United States |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 2,550 | 1,984
Corporate | United Kingdom |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 8,274 | 8,744
Investments for account of segregated fund holders | 10,513 | 11,986
Corporate | Canada |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | 3,384 | 3,723
Corporate | Other countries |  |
Disclosure of operating segments [line items] |  |
Total general fund assets | $ 170 | $ 154

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