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Insurance Contract Liabilities and Investment Contract Liabilities - Impact of Method and Assumption Changes (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of types of insurance contracts [line items]
Net increase (decrease) before income taxes	$ (278)	$ (173)
Mortality / Morbidity
Disclosure of types of insurance contracts [line items]
Net increase (decrease) before income taxes	(337)	(286)
Lapse and other policyholder behaviour
Disclosure of types of insurance contracts [line items]
Net increase (decrease) before income taxes	563	149
Expenses
Disclosure of types of insurance contracts [line items]
Net increase (decrease) before income taxes	6	71
Investment returns
Disclosure of types of insurance contracts [line items]
Net increase (decrease) before income taxes	(331)	(62)
Model enhancements and other
Disclosure of types of insurance contracts [line items]
Net increase (decrease) before income taxes	$ (179)	$ (45)

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-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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