v3.26.1
Fair value of financial instruments - Summary of Comparison of Carrying and Fair Values for Each Classification of Financial Instrument (Detail) - CAD ($)
$ in Millions
Jul. 31, 2026
Oct. 31, 2025
Financial assets    
Interest-bearing deposits with banks $ 50,434 $ 50,364
Securities    
Trading 252,210 219,067
Investment, net of applicable allowance 393,952 342,721
Securities 646,162 561,788
Assets purchased under reverse repurchase agreements and securities borrowed 314,038 309,683
Loans, net of applicable allowance    
Loans, net 1,108,730 1,042,422
Other    
Derivatives 162,386 177,206
Deposits    
Personal 538,618 529,740
Business and government 1,026,919 946,314
Bank 79,036 39,562
Deposits 1,644,573 1,515,616
Other    
Obligations related to securities sold short 59,405 49,891
Obligations related to assets sold under repurchase agreements and securities loaned 325,185 289,516
Derivatives 167,038 183,953
Subordinated debentures 13,580 13,961
Financial assets classified as FVTPL [member]    
Securities    
Trading 244,630 212,878
Securities 244,630 212,878
Assets purchased under reverse repurchase agreements and securities borrowed 236,944 226,213
Loans, net of applicable allowance    
Retail 1,382 1,128
Wholesale 12,544 9,724
Loans, net 13,926 10,852
Other    
Derivatives 162,386 177,206
Other assets 19,807 14,382
Financial assets designated as FVTPL [member]    
Financial assets    
Interest-bearing deposits with banks 40,521 40,455
Securities    
Trading 7,580 6,189
Securities 7,580 6,189
Financial assets classified as FVOCI [member]    
Securities    
Investment, net of applicable allowance 288,844 240,299
Securities 288,844 240,299
Loans, net of applicable allowance    
Retail 433 442
Wholesale 683 690
Loans, net 1,116 1,132
Financial assets designated as FVOCI [member]    
Securities    
Investment, net of applicable allowance 1,659 1,496
Securities 1,659 1,496
Financial liabilities classified as FVTPL [member]    
Deposits    
Personal 1,190 942
Business and government 496 313
Deposits 1,686 1,255
Other    
Obligations related to securities sold short 59,405 49,891
Derivatives 167,038 183,953
Financial liabilities designated as FVTPL [member]    
Deposits    
Personal 45,087 41,302
Business and government 190,637 168,690
Bank 4,195 2,908
Deposits 239,919 212,900
Other    
Obligations related to assets sold under repurchase agreements and securities loaned 269,759 242,916
Other liabilities 20,198 21,688
Subordinated debentures 217 232
Fair value of financial instruments not measured at fair value [member] | Financial assets measured at amortized cost [member]    
Financial assets    
Interest-bearing deposits with banks 9,913 9,909
Securities    
Investment, net of applicable allowance 100,270 98,728
Securities 100,270 98,728
Assets purchased under reverse repurchase agreements and securities borrowed 77,110 83,470
Loans, net of applicable allowance    
Retail 674,294 648,413
Wholesale 417,258 382,551
Loans, net 1,091,552 1,030,964
Other    
Other assets 64,457 58,487
Fair value of financial instruments not measured at fair value [member] | Financial liabilities measured at amortized cost [member]    
Deposits    
Personal 492,732 488,644
Business and government 836,967 779,130
Bank 74,837 36,657
Deposits 1,404,536 1,304,431
Other    
Obligations related to assets sold under repurchase agreements and securities loaned 55,426 46,600
Other liabilities 66,292 58,293
Subordinated debentures 13,441 13,887
Financial assets at carrying amount [member]    
Financial assets    
Interest-bearing deposits with banks 50,434 50,364
Securities    
Trading 252,210 219,067
Investment, net of applicable allowance 393,952 342,721
Securities 646,162 561,788
Assets purchased under reverse repurchase agreements and securities borrowed 314,038 309,683
Loans, net of applicable allowance    
Retail 677,719 648,402
Wholesale 431,011 394,020
Loans, net 1,108,730 1,042,422
Other    
Derivatives 162,386 177,206
Other assets 84,264 72,869
Financial assets at carrying amount [member] | Financial assets measured at amortized cost [member]    
Financial assets    
Interest-bearing deposits with banks 9,913 9,909
Securities    
Investment, net of applicable allowance 103,449 100,926
Securities 103,449 100,926
Assets purchased under reverse repurchase agreements and securities borrowed 77,094 83,470
Loans, net of applicable allowance    
Retail 675,904 646,832
Wholesale 417,784 383,606
Loans, net 1,093,688 1,030,438
Other    
Other assets 64,457 58,487
Financial assets at fair value [member]    
Financial assets    
Interest-bearing deposits with banks 50,434 50,364
Securities    
Trading 252,210 219,067
Investment, net of applicable allowance 390,773 340,523
Securities 642,983 559,590
Assets purchased under reverse repurchase agreements and securities borrowed 314,054 309,683
Loans, net of applicable allowance    
Retail 676,109 649,983
Wholesale 430,485 392,965
Loans, net 1,106,594 1,042,948
Other    
Derivatives 162,386 177,206
Other assets 84,264 72,869
Financial liabilities at carrying amount [member]    
Deposits    
Personal 538,618 529,740
Business and government 1,026,919 946,314
Bank 79,036 39,562
Deposits 1,644,573 1,515,616
Other    
Obligations related to securities sold short 59,405 49,891
Obligations related to assets sold under repurchase agreements and securities loaned 325,185 289,516
Derivatives 167,038 183,953
Other liabilities 86,504 79,975
Subordinated debentures 13,580 13,961
Financial liabilities at carrying amount [member] | Financial liabilities measured at amortized cost [member]    
Deposits    
Personal 492,341 487,496
Business and government 835,786 777,311
Bank 74,841 36,654
Deposits 1,402,968 1,301,461
Other    
Obligations related to assets sold under repurchase agreements and securities loaned 55,426 46,600
Other liabilities 66,306 58,287
Subordinated debentures 13,363 13,729
Financial liabilities at fair value [member]    
Deposits    
Personal 539,009 530,888
Business and government 1,028,100 948,133
Bank 79,032 39,565
Deposits 1,646,141 1,518,586
Other    
Obligations related to securities sold short 59,405 49,891
Obligations related to assets sold under repurchase agreements and securities loaned 325,185 289,516
Derivatives 167,038 183,953
Other liabilities 86,490 79,981
Subordinated debentures $ 13,658 $ 14,119