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Segregated Funds - Investments for Account of Segregated Fund Holders (Details) - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items] |  |
Equity securities | $ 6,631 | $ 4,787
Debt securities | 89,089 | 81,606
Cash, cash equivalents and short-term securities | 13,527 | 9,575
Investment properties | 7,516 | 7,306
Other assets | 5,152 | 5,216
Total assets | 323,011 | 297,202
Less: Liabilities arising from investing activities | 297,149 | 272,694
Total investments for account of segregated fund holders | 125,921 | 116,973
Investments for account of segregated fund holders |  |
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items] |  |
Segregated and mutual fund units | 111,789 | 102,071
Equity securities | 9,733 | 10,565
Debt securities | 3,874 | 3,825
Cash, cash equivalents and short-term securities | 693 | 589
Investment properties | 387 | 403
Mortgages | 19 | 21
Other assets | 140 | 146
Total assets | 126,635 | 117,620
Investment for account of segregated fund holders, liabilities arising from investing activities |  |
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items] |  |
Less: Liabilities arising from investing activities | $ 714 | $ 647

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