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Financial Instrument Risk Management - Mortgages and Loans by Geographic Location and Type (Details) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | $ 143,061 | $ 137,691
Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 16,433 | 15,493
Loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 30,389 | 27,312
Mortgages and loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 46,822 | 42,805
Retail | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 4,202 | 4,291
Office | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 4,228 | 4,261
Multi-family residential | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 5,375 | 4,582
Industrial and land | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,906 | 1,660
Other | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 722 | 699
Canada | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 8,557 | 8,390
Canada | Mortgages | Canada Mortgage And Housing Corporation |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,537 | 3,171
Canada | Loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 13,238 | 13,265
Canada | Mortgages and loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 21,795 | 21,655
Canada | Retail | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,921 | 2,027
Canada | Office | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,811 | 1,898
Canada | Multi-family residential | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,455 | 3,214
Canada | Industrial and land | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 752 | 670
Canada | Other | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 618 | 581
United States | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 7,876 | 7,103
United States | Loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 11,458 | 9,542
United States | Mortgages and loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 19,334 | 16,645
United States | Retail | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 2,281 | 2,264
United States | Office | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 2,417 | 2,363
United States | Multi-family residential | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,920 | 1,368
United States | Industrial and land | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,154 | 990
United States | Other | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 104 | 118
United Kingdom | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
United Kingdom | Loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 2,547 | 1,678
United Kingdom | Mortgages and loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 2,547 | 1,678
United Kingdom | Retail | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
United Kingdom | Office | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
United Kingdom | Multi-family residential | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
United Kingdom | Industrial and land | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
United Kingdom | Other | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Other countries | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Other countries | Loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,146 | 2,827
Other countries | Mortgages and loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,146 | 2,827
Other countries | Retail | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Other countries | Office | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Other countries | Multi-family residential | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Other countries | Industrial and land | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Other countries | Other | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | $ 0 | $ 0

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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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