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Insurance Contract Liabilities and Reinsurance Assets - Summary of Actuarial Methods and Assumptions (Parenthetical) (Detail) - CAD CAD in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of sensitivity analysis for actuarial assumptions [abstract]
Change in net insurance and investment contract liabilities	CAD 277	CAD 655
Net income attributed to participating policyholders	CAD 88

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- References

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- Definition

The increase (decrease) in insurance liabilities, net of reinsurance.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2017-01-01
-Paragraph 85
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_85&doctype=Standard
-URIDate 2017-03-09

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- Definition

Increase (decrease) in net income attributed to participating policyholders

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