Loans, Impaired Loans and Allowance for Credit Losses - Loans Past Due But Not Impaired (Detail) - CAD ($) $ in Millions		Oct. 31, 2025	Oct. 31, 2024
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[1]	$ 778,508	$ 767,365
Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross		370,191	350,941
Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross		110,567	106,379
Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross		18,045	17,374
Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross		279,705	292,671
Financial assets past due but not impaired [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	4,664	4,178
Financial assets past due but not impaired [member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	2,370	2,136
Financial assets past due but not impaired [member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	1,044	990
Financial assets past due but not impaired [member] | Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	908	812
Financial assets past due but not impaired [member] | Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	342	240
31 - 60 days [member] | Financial assets past due but not impaired [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	2,821	2,499
31 - 60 days [member] | Financial assets past due but not impaired [member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	1,603	1,418
31 - 60 days [member] | Financial assets past due but not impaired [member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	691	647
31 - 60 days [member] | Financial assets past due but not impaired [member] | Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	289	242
31 - 60 days [member] | Financial assets past due but not impaired [member] | Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	238	192
61 - 90 days [member] | Financial assets past due but not impaired [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	1,413	1,281
61 - 90 days [member] | Financial assets past due but not impaired [member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	767	718
61 - 90 days [member] | Financial assets past due but not impaired [member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	353	343
61 - 90 days [member] | Financial assets past due but not impaired [member] | Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	189	172
61 - 90 days [member] | Financial assets past due but not impaired [member] | Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3]	104	48
91 days and greater [member] | Financial assets past due but not impaired [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3],[4]	430	398
91 days and greater [member] | Financial assets past due but not impaired [member] | Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Loans and receivables gross	[2],[3],[4]	$ 430	$ 398

[1] Geographic segmentation is based on the location of the property for residential mortgages; otherwise, the residence of the borrower.

[2] For loans where payment deferrals were granted, deferred payments are not considered past due and such loans are not aged further during the deferral period. Regular aging of the loans resumes, after the end of the deferral period.

[3] Loans past due 30 days or less are not presented in this analysis as they are not administratively considered past due.

[4] All loans that are over 90 days past due are considered impaired with the exception of credit card receivables which are considered impaired when 180 days past due.