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Financial Instrument Risk Management - Reinsurance Counterparties Exposure by Credit Rating (Details) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of external credit grades [line items] |  |
Financial assets | $ 143,061 | $ 137,691
Total Reinsurance assets | 4,141 | 4,028
Credit risk | Gross exposure |  |
Disclosure of external credit grades [line items] |  |
Less: negative reinsurance assets | 1,272 | 874
Total Reinsurance assets | 4,141 | 4,028
Credit risk | Gross exposure | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 5,413 | 4,902
Credit risk | Gross exposure | AA | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 1,442 | 1,241
Credit risk | Gross exposure | A | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 1,760 | 1,632
Credit risk | Gross exposure | BBB | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 203 | 157
Credit risk | Gross exposure | BB | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 1,677 | 1,539
Credit risk | Gross exposure | B | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 0 | 257
Credit risk | Gross exposure | CCC | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 252 | 0
Credit risk | Gross exposure | Not rated | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 79 | 76
Credit risk | Collateral | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 1,985 | 1,820
Credit risk | Collateral | AA | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 6 | 4
Credit risk | Collateral | A | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 83 | 99
Credit risk | Collateral | BBB | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 132 | 116
Credit risk | Collateral | BB | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 1,617 | 1,455
Credit risk | Collateral | B | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 0 | 74
Credit risk | Collateral | CCC | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 72 | 0
Credit risk | Collateral | Not rated | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 75 | 72
Credit risk | Net exposure | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 3,428 | 3,082
Credit risk | Net exposure | AA | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 1,436 | 1,237
Credit risk | Net exposure | A | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 1,677 | 1,533
Credit risk | Net exposure | BBB | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 71 | 41
Credit risk | Net exposure | BB | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 60 | 84
Credit risk | Net exposure | B | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 0 | 183
Credit risk | Net exposure | CCC | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | 180 | 0
Credit risk | Net exposure | Not rated | Reinsurance Assets |  |
Disclosure of external credit grades [line items] |  |
Financial assets | $ 4 | $ 4

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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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