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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, 2018 | Dec. 31, 2017
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Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 6,858 | $ 5,757
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 | $ 3,575 | $ 3,273
Percentage of investments in associates carrying value | 51.00% | 56.00%
Timber and agriculture [Member] |  |
Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 599 | $ 451
Percentage of investments in associates carrying value | 9.00% | 8.00%
Real estate [Member] |  |
Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 725 | $ 498
Percentage of investments in associates carrying value | 11.00% | 9.00%
Other [Member] |  |
Disclosure Of Carrying Value Measurement Of Assets [Line Items] |  |
Investments in associates carrying value | $ 1,959 | $ 1,535
Percentage of investments in associates carrying value | 29.00% | 27.00%

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