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Total Invested Assets and Related Net Investment Income - Carrying Value and Fair Value of Financial Assets (Details) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of fair value measurement of assets [line items] |  |
Financial assets | $ 143,061 | $ 137,691
Financial assets, at fair value | 144,673 | 140,292
Invested assets | 151,726 | 146,139
Investment properties | 7,157 | 7,067
Other invested assets - non-financial assets | 1,508 | 1,381
Cash, cash equivalents and short-term securities |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 9,506 | 8,890
Financial assets, at fair value | 9,506 | 8,890
Debt securities |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 74,443 | 72,619
Debt securities | Fair value through profit or loss |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 61,402 | 59,967
Financial assets, at fair value | 61,402 | 59,967
Debt securities | Available-for-sale |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 13,041 | 12,652
Financial assets, at fair value | 13,041 | 12,652
Equity securities |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 4,634 | 6,020
Equity securities | Fair value through profit or loss |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 4,014 | 5,078
Financial assets, at fair value | 4,014 | 5,078
Equity securities | Available-for-sale |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 620 | 942
Financial assets, at fair value | 620 | 942
Mortgages and loans |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 46,822 | 42,805
Financial assets, at fair value | 48,434 | 45,406
Derivative assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 1,112 | 1,478
Financial assets, at fair value | 1,112 | 1,478
Other invested assets | Fair value through profit or loss |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 2,701 | 2,211
Financial assets, at fair value | 2,701 | 2,211
Other invested assets | Available-for-sale |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 621 | 562
Financial assets, at fair value | 621 | 562
Policy loans |  |
Disclosure of fair value measurement of assets [line items] |  |
Financial assets | 3,222 | 3,106
Financial assets, at fair value | $ 3,222 | $ 3,106

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35H&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35I&doctype=Standard -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35M&doctype=Standard -URIDate 2017-03-09 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35N -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35N&doctype=Standard -URIDate 2017-03-09 + Details
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