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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, 2018	Dec. 31, 2017
Disclosure of Investment Contract Liabilities [line items]
Beginning balance	$ 3,126
Ending balance	3,265	$ 3,126
Fair value [Member]
Disclosure of Investment Contract Liabilities [line items]
Beginning balance	639	631
New policies	96	50
Changes in market conditions	76	76
Redemptions, surrenders and maturities	(86)	(72)
Impact of changes in foreign exchange rates	57	(46)
Ending balance	$ 782	$ 639

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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 2018-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard
-URIDate 2018-03-16

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- Definition

Disclosure of Investment Contract Liabilities [line items]

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- Definition

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

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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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