Financial Instrument Risk Management - Debt Securities by Geographic Location (Details) - CAD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of geographical areas [line items]
Financial assets	$ 168,785	$ 152,785
Debt securities
Disclosure of geographical areas [line items]
Financial assets	89,089	81,606
Debt securities \| Canada
Disclosure of geographical areas [line items]
Financial assets	38,690	33,252
Debt securities \| United States
Disclosure of geographical areas [line items]
Financial assets	31,167	30,046
Debt securities \| United Kingdom
Disclosure of geographical areas [line items]
Financial assets	5,079	5,402
Debt securities \| Other countries
Disclosure of geographical areas [line items]
Financial assets	14,153	12,906
Fair value through profit or loss \| Debt securities
Disclosure of geographical areas [line items]
Financial assets	77,834	67,894
Fair value through profit or loss \| Debt securities \| Canada
Disclosure of geographical areas [line items]
Financial assets	34,005	28,221
Fair value through profit or loss \| Debt securities \| United States
Disclosure of geographical areas [line items]
Financial assets	27,183	24,224
Fair value through profit or loss \| Debt securities \| United Kingdom
Disclosure of geographical areas [line items]
Financial assets	4,592	4,874
Fair value through profit or loss \| Debt securities \| Other countries
Disclosure of geographical areas [line items]
Financial assets	12,054	10,575
Available- for-sale \| Debt securities
Disclosure of geographical areas [line items]
Financial assets	11,255	13,712
Available- for-sale \| Debt securities \| Canada
Disclosure of geographical areas [line items]
Financial assets	4,685	5,031
Available- for-sale \| Debt securities \| United States
Disclosure of geographical areas [line items]
Financial assets	3,984	5,822
Available- for-sale \| Debt securities \| United Kingdom
Disclosure of geographical areas [line items]
Financial assets	487	528
Available- for-sale \| Debt securities \| Other countries
Disclosure of geographical areas [line items]
Financial assets	$ 2,099	$ 2,331

- 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]

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