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Financial Instrument Risk Management - Debt Securities by Credit Rating (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2021
Disclosure of external credit grades [line items]
Percent of debt security portfolio considered investment grade	99.00%
Carrying value	$ 157,035	$ 162,948	$ 174,499
Debt securities | Credit risk
Disclosure of external credit grades [line items]
Carrying value	75,902
Debt securities | Credit risk | AAA
Disclosure of external credit grades [line items]
Carrying value	15,262
Debt securities | Credit risk | AA
Disclosure of external credit grades [line items]
Carrying value	11,310
Debt securities | Credit risk | A
Disclosure of external credit grades [line items]
Carrying value	27,696
Debt securities | Credit risk | BBB
Disclosure of external credit grades [line items]
Carrying value	20,668
Debt securities | Credit risk | BB and lower
Disclosure of external credit grades [line items]
Carrying value	966
FVTPL | Debt securities | Credit risk
Disclosure of external credit grades [line items]
Carrying value	59,357
FVTPL | Debt securities | Credit risk | AAA
Disclosure of external credit grades [line items]
Carrying value	9,440
FVTPL | Debt securities | Credit risk | AA
Disclosure of external credit grades [line items]
Carrying value	9,267
FVTPL | Debt securities | Credit risk | A
Disclosure of external credit grades [line items]
Carrying value	23,050
FVTPL | Debt securities | Credit risk | BBB
Disclosure of external credit grades [line items]
Carrying value	17,007
FVTPL | Debt securities | Credit risk | BB and lower
Disclosure of external credit grades [line items]
Carrying value	593
FVOCI | Debt securities
Disclosure of external credit grades [line items]
Carrying value		$ 14,313
FVOCI | Debt securities | Credit risk
Disclosure of external credit grades [line items]
Carrying value	16,545
FVOCI | Debt securities | Credit risk | AAA
Disclosure of external credit grades [line items]
Carrying value	5,822
FVOCI | Debt securities | Credit risk | AA
Disclosure of external credit grades [line items]
Carrying value	2,043
FVOCI | Debt securities | Credit risk | A
Disclosure of external credit grades [line items]
Carrying value	4,646
FVOCI | Debt securities | Credit risk | BBB
Disclosure of external credit grades [line items]
Carrying value	3,661
FVOCI | Debt securities | Credit risk | BB and lower
Disclosure of external credit grades [line items]
Carrying value	$ 373

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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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Risk Exposure Associated With Instruments Sharing Characteristic, Concentration Percentage

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