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IFRS 7 - Disclosure - Credit Risk - Summary of Industry-wide Breakdown of Business and Government Exposure (Detail) - CAD ($) $ in Millions	Oct. 31, 2025	Oct. 31, 2024
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	$ 1,095,621	$ 1,022,941
Business and government portfolios [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	561,762	522,546
Internal Ratings Based [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,035,402	973,004
Internal Ratings Based [member] | Business and government portfolios [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	542,824	504,932
Internal Ratings Based [member] | Business and government portfolios [member] | Commercial mortgages [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	9,091	7,832
Internal Ratings Based [member] | Business and government portfolios [member] | Financial institutions [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	160,588	142,612
Internal Ratings Based [member] | Business and government portfolios [member] | Retail and wholesale [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	18,807	17,844
Internal Ratings Based [member] | Business and government portfolios [member] | Business services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	19,697	19,299
Internal Ratings Based [member] | Business and government portfolios [member] | Manufacturing capital goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	10,318	8,858
Internal Ratings Based [member] | Business and government portfolios [member] | Manufacturing consumer goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	9,667	9,281
Internal Ratings Based [member] | Business and government portfolios [member] | Real estate and construction [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	68,838	65,926
Internal Ratings Based [member] | Business and government portfolios [member] | Agriculture [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	10,631	9,934
Internal Ratings Based [member] | Business and government portfolios [member] | Oil and gas [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	7,640	6,822
Internal Ratings Based [member] | Business and government portfolios [member] | Mining [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	5,592	4,901
Internal Ratings Based [member] | Business and government portfolios [member] | Forest products [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,476	1,114
Internal Ratings Based [member] | Business and government portfolios [member] | Hardware and software [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	9,319	7,382
Internal Ratings Based [member] | Business and government portfolios [member] | Telecommunications and cable [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	5,135	3,896
Internal Ratings Based [member] | Business and government portfolios [member] | Publishing, printing and broadcasting [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	640	859
Internal Ratings Based [member] | Business and government portfolios [member] | Transportation [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	12,253	11,664
Internal Ratings Based [member] | Business and government portfolios [member] | Utilities [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	33,655	30,628
Internal Ratings Based [member] | Business and government portfolios [member] | Education, health and social services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	12,804	12,535
Internal Ratings Based [member] | Business and government portfolios [member] | Governments [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	146,673	$ 143,545
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	406,405
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Commercial mortgages [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	9,074
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Financial institutions [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	103,109
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Retail and wholesale [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	13,500
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Business services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	14,084
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Manufacturing capital goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	6,558
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Manufacturing consumer goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	7,184
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Real estate and construction [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	55,825
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Agriculture [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	8,938
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Oil and gas [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	2,420
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Mining [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	2,059
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Forest products [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	722
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Hardware and software [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	6,050
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Telecommunications and cable [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	3,694
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Publishing, printing and broadcasting [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	492
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Transportation [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	7,470
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Utilities [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	17,524
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Education, health and social services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	10,540
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] | Governments [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	137,162
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	67,929
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Commercial mortgages [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	17
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Financial institutions [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	13,497
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Retail and wholesale [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	4,411
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Business services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	4,079
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Manufacturing capital goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	2,963
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Manufacturing consumer goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	2,074
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Real estate and construction [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	10,053
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Agriculture [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,489
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Oil and gas [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	3,580
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Mining [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,360
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Forest products [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	553
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Hardware and software [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	2,644
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Telecommunications and cable [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	746
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Publishing, printing and broadcasting [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	118
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Transportation [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	3,764
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Utilities [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	9,250
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Education, health and social services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,827
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] | Governments [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	5,504
Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	25,582
Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] | Financial institutions [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	24,028
Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] | Business services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	57
Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] | Hardware and software [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	114
Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] | Education, health and social services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	3
Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] | Governments [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,380
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	20,094
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Financial institutions [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	6,875
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Retail and wholesale [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	542
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Business services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,126
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Manufacturing capital goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	494
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Manufacturing consumer goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	234
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Real estate and construction [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	2,333
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Agriculture [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	74
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Oil and gas [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	480
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Mining [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	798
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Forest products [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	169
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Hardware and software [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	162
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Telecommunications and cable [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	258
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Publishing, printing and broadcasting [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	11
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Transportation [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	498
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Utilities [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	5,238
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Education, health and social services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	281
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] | Governments [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	521
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	22,814
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Financial institutions [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	13,079
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Retail and wholesale [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	354
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Business services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	351
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Manufacturing capital goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	303
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Manufacturing consumer goods [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	175
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Real estate and construction [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	627
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Agriculture [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	130
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Oil and gas [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,160
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Mining [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,375
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Forest products [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	32
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Hardware and software [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	349
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Telecommunications and cable [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	437
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Publishing, printing and broadcasting [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	19
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Transportation [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	521
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Utilities [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	1,643
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Education, health and social services [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	153
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] | Governments [member]
Disclosure of credit risk exposure [line items]
Exposure to Credit Risk	$ 2,106

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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No definition available.

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The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 35K
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35K_a&doctype=Standard
-URIDate 2024-03-27

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