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Invested Assets and Investment Income - Schedule of Other Invested Assets Include Investments in Associates and Joint Ventures Accounted Using Equity Method (Detail) - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 8,474 | $ 7,786
Percentage of investments in associates carrying value | 100.00% | 100.00%
Leveraged leases [Member] |  |
Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 3,371 | $ 3,371
Percentage of investments in associates carrying value | 40.00% | 43.00%
Timber and agriculture [Member] |  |
Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 694 | $ 668
Percentage of investments in associates carrying value | 8.00% | 9.00%
Real estate [Member] |  |
Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 1,187 | $ 1,031
Percentage of investments in associates carrying value | 14.00% | 13.00%
Other [Member] |  |
Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 3,222 | $ 2,716
Percentage of investments in associates carrying value | 38.00% | 35.00%

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