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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
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of Investment Contract Liabilities [line items]
Beginning balance	$ 3,288
Ending balance	3,117	$ 3,288
Fair value [Member]
Disclosure of Investment Contract Liabilities [line items]
Beginning balance	932	789
New policies	54	180
Changes in market conditions	(38)	90
Redemptions, surrenders and maturities	(138)	(108)
Impact of changes in foreign exchange rates	(8)	(19)
Ending balance	$ 802	$ 932

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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 2021-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard
-URIDate 2021-03-24

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- Definition

Disclosure of Investment Contract Liabilities [line items]

+ References

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- Definition

Increase decrease in Investment contracts liabilities due to changes in market conditions.

+ References

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- Definition

Increase decrease in investment contracts liabilities due to impact of changes in foreign exchange rates.

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- Definition

Increase decrease in Investment contracts liabilities due to new policies.

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- Definition

Increase decrease in Investment contracts liabilities due to redemptions, surrenders and maturities.

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