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IFRS 7 Disclosures - Summary of Account Balances by Investment Category (Detail) - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | $ 105,811 | $ 105,611
Equity funds [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | 47,348 | 47,489
Balanced funds [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | 42,414 | 42,448
Bond funds [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | 11,944 | 11,967
Money market funds [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | 2,113 | 1,732
Other fixed interest rate investments [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | $ 1,992 | $ 1,975

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