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IFRS 7 Disclosures - Summary of Account Balances by Investment Category (Detail) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | $ 101,566 | $ 111,654
Equity funds [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | 43,528 | 47,508
Balanced funds [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | 41,625 | 47,369
Bond funds [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | 12,309 | 13,095
Money market funds [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | 2,107 | 1,905
Other fixed interest rate investments [Member] |  |
Investment Categories For Variable Contracts With Guarantees [line items] |  |
Investments for variable contracts with guarantees | $ 1,997 | $ 1,777

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