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Investment Contract Liabilities - Summary of Movement in Investment Contract Liabilities Measured at Fair Value (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of Investment Contract Liabilities [line items] |  |
Beginning balance | $ 3,104 |
Ending balance | 3,288 | $ 3,104
Fair value [Member] |  |
Disclosure of Investment Contract Liabilities [line items] |  |
Beginning balance | 789 | 782
New policies | 180 | 66
Changes in market conditions | 90 | 62
Redemptions, surrenders and maturities | (108) | (86)
Impact of changes in foreign exchange rates | (19) | (35)
Ending balance | $ 932 | $ 789

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- Definition The amount of liabilities relating to investment contracts that fall within the scope of IAS 39 or IFRS 9. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Increase decrease in Investment contracts liabilities due to changes in market conditions. + References No definition available. + Details
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