v3.26.1
Loans and Allowance for Credit Losses - Summary of Credit Risk Exposures for Loans Carried at Amortized Cost, FVOCI or FVTPL (Details) - CAD ($)
$ in Millions
6 Months Ended 12 Months Ended
Apr. 30, 2026
Oct. 31, 2025
Disclosure of credit risk exposure [line items]    
ACL $ 5,798 $ 5,739
Loans: Residential mortgages    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 193,595 195,787
Loans: Residential mortgages | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 193,816 196,033
ACL 221 246
Loans: Residential mortgages | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,045 903
Loans: Residential mortgages | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 1
Loans: Residential mortgages | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 116,261 111,143
Loans: Residential mortgages | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 48,827 53,199
Loans: Residential mortgages | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 11,285 13,761
Loans: Residential mortgages | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 3,652 3,272
Loans: Residential mortgages | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 12,746 13,754
Loans: Consumer instalment and other personal    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 91,466 91,867
Loans: Consumer instalment and other personal | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 92,380 92,741
ACL 914 874
Loans: Consumer instalment and other personal | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 615 627
Loans: Consumer instalment and other personal | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 9,244 9,985
Loans: Consumer instalment and other personal | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 41,129 21,997
Loans: Consumer instalment and other personal | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 9,533 28,920
Loans: Consumer instalment and other personal | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 13,014 12,557
Loans: Consumer instalment and other personal | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 3,301 2,834
Loans: Consumer instalment and other personal | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 15,544 15,821
Loans: Credit cards    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 11,335 11,997
Loans: Credit cards | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 11,986 12,649
ACL 651 652
Loans: Credit cards | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Loans: Credit cards | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,653 1,643
Loans: Credit cards | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 2,033 2,133
Loans: Credit cards | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,785 1,926
Loans: Credit cards | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 4,165 4,741
Loans: Credit cards | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,990 1,824
Loans: Credit cards | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 360 382
Loans: Business and government    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 383,549 378,221
Loans: Business and government | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 386,827 381,499
ACL 3,278 3,278
Loans: Business and government | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,279 5,561
Loans: Business and government | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 204,533 192,580
Loans: Business and government | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 158,184 161,769
Loans: Business and government | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 18,831 21,589
Total gross loans and acceptances | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 685,009 682,922
Total net loans and acceptances    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 679,945 677,872
Commitments and financial guarantee contracts    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 295,793 293,646
Commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
ACL 734 689
Commitments and financial guarantee contracts | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 1,783 1,660
Commitments and financial guarantee contracts | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 213,804 204,457
Commitments and financial guarantee contracts | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 73,655 79,126
Commitments and financial guarantee contracts | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 7,285 9,092
Gross commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 296,527 294,335
Stage 1 | Loans: Residential mortgages    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 178,284 180,482
Stage 1 | Loans: Residential mortgages | FVTPL loans    
Disclosure of credit risk exposure [line items]    
FVTPL loans 68 79
Stage 1 | Loans: Residential mortgages | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 178,333 180,538
ACL 49 56
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 1
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 115,795 110,299
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 43,689 50,148
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 6,360 7,048
Stage 1 | Loans: Residential mortgages | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 303 240
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 12,186 12,802
Stage 1 | Loans: Consumer instalment and other personal    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 78,932 80,475
Stage 1 | Loans: Consumer instalment and other personal | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 79,115 80,657
ACL 183 182
Stage 1 | Loans: Consumer instalment and other personal | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 1 | Loans: Consumer instalment and other personal | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 9,242 9,984
Stage 1 | Loans: Consumer instalment and other personal | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 40,470 21,962
Stage 1 | Loans: Consumer instalment and other personal | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 7,664 26,238
Stage 1 | Loans: Consumer instalment and other personal | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 6,801 6,991
Stage 1 | Loans: Consumer instalment and other personal | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 735 670
Stage 1 | Loans: Consumer instalment and other personal | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 14,203 14,812
Stage 1 | Loans: Credit cards    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 9,800 9,895
Stage 1 | Loans: Credit cards | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 9,945 10,020
ACL 145 125
Stage 1 | Loans: Credit cards | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 1 | Loans: Credit cards | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,653 1,643
Stage 1 | Loans: Credit cards | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 2,018 2,129
Stage 1 | Loans: Credit cards | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,714 1,846
Stage 1 | Loans: Credit cards | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 3,331 3,550
Stage 1 | Loans: Credit cards | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 961 592
Stage 1 | Loans: Credit cards | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 268 260
Stage 1 | Loans: Business and government    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 326,707 327,143
Stage 1 | Loans: Business and government | FVTPL loans    
Disclosure of credit risk exposure [line items]    
FVTPL loans 12,823 13,231
Stage 1 | Loans: Business and government | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 327,398 327,899
ACL 691 756
Stage 1 | Loans: Business and government | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 1 | Loans: Business and government | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 200,205 188,707
Stage 1 | Loans: Business and government | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 127,073 139,069
Stage 1 | Loans: Business and government | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 120 123
Stage 1 | Total gross loans and acceptances | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 594,791 599,114
Stage 1 | Total net loans and acceptances    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 593,723 597,995
Stage 1 | Commitments and financial guarantee contracts    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 263,761 268,056
Stage 1 | Commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
ACL 310 256
Stage 1 | Commitments and financial guarantee contracts | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 0 0
Stage 1 | Commitments and financial guarantee contracts | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 208,897 202,913
Stage 1 | Commitments and financial guarantee contracts | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 55,164 65,393
Stage 1 | Commitments and financial guarantee contracts | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 10 6
Stage 1 | Gross commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 264,071 268,312
Stage 2 | Loans: Residential mortgages    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 14,288 14,414
Stage 2 | Loans: Residential mortgages | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 14,438 14,592
ACL 150 178
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 466 844
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,138 3,051
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 4,925 6,713
Stage 2 | Loans: Residential mortgages | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 3,349 3,032
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 560 952
Stage 2 | Loans: Consumer instalment and other personal    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 12,081 10,925
Stage 2 | Loans: Consumer instalment and other personal | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 12,650 11,457
ACL 569 532
Stage 2 | Loans: Consumer instalment and other personal | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 2 | Loans: Consumer instalment and other personal | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 2 1
Stage 2 | Loans: Consumer instalment and other personal | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 659 35
Stage 2 | Loans: Consumer instalment and other personal | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,869 2,682
Stage 2 | Loans: Consumer instalment and other personal | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 6,213 5,566
Stage 2 | Loans: Consumer instalment and other personal | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 2,566 2,164
Stage 2 | Loans: Consumer instalment and other personal | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,341 1,009
Stage 2 | Loans: Credit cards    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,535 2,102
Stage 2 | Loans: Credit cards | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 2,041 2,629
ACL 506 527
Stage 2 | Loans: Credit cards | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 2 | Loans: Credit cards | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 2 | Loans: Credit cards | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 15 4
Stage 2 | Loans: Credit cards | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 71 80
Stage 2 | Loans: Credit cards | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 834 1,191
Stage 2 | Loans: Credit cards | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,029 1,232
Stage 2 | Loans: Credit cards | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 92 122
Stage 2 | Loans: Business and government    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 52,480 46,319
Stage 2 | Loans: Business and government | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 54,150 48,039
ACL 1,670 1,720
Stage 2 | Loans: Business and government | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 2 | Loans: Business and government | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 4,328 3,873
Stage 2 | Loans: Business and government | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 31,111 22,700
Stage 2 | Loans: Business and government | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 18,711 21,466
Stage 2 | Total gross loans and acceptances | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 83,279 76,717
Stage 2 | Total net loans and acceptances    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 80,384 73,760
Stage 2 | Commitments and financial guarantee contracts    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 30,309 23,986
Stage 2 | Commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
ACL 364 377
Stage 2 | Commitments and financial guarantee contracts | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 0 0
Stage 2 | Commitments and financial guarantee contracts | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 4,907 1,544
Stage 2 | Commitments and financial guarantee contracts | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 18,491 13,733
Stage 2 | Commitments and financial guarantee contracts | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 7,275 9,086
Stage 2 | Gross commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 30,673 24,363
Stage 3 | Loans: Residential mortgages    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,023 891
Stage 3 | Loans: Residential mortgages | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,045 903
ACL 22 12
Stage 3 | Loans: Residential mortgages | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,045 903
Stage 3 | Loans: Residential mortgages | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Residential mortgages | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Residential mortgages | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Residential mortgages | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Residential mortgages | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Residential mortgages | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Consumer instalment and other personal    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 453 467
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 615 627
ACL 162 160
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 615 627
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Credit cards    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Credit cards | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
ACL 0 0
Stage 3 | Loans: Credit cards | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Credit cards | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Credit cards | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Credit cards | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Credit cards | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Credit cards | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Credit cards | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Business and government    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 4,362 4,759
Stage 3 | Loans: Business and government | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,279 5,561
ACL 917 802
Stage 3 | Loans: Business and government | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,279 5,561
Stage 3 | Loans: Business and government | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Business and government | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Loans: Business and government | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 0 0
Stage 3 | Total gross loans and acceptances | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 6,939 7,091
Stage 3 | Total net loans and acceptances    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,838 6,117
Stage 3 | Commitments and financial guarantee contracts    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 1,723 1,604
Stage 3 | Commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
ACL 60 56
Stage 3 | Commitments and financial guarantee contracts | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 1,783 1,660
Stage 3 | Commitments and financial guarantee contracts | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 0 0
Stage 3 | Commitments and financial guarantee contracts | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 0 0
Stage 3 | Commitments and financial guarantee contracts | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 0 0
Stage 3 | Gross commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans $ 1,783 $ 1,660
Principal | Loans: Credit cards | Low    
Disclosure of credit risk exposure [line items]    
Number of days for which the loan receivable is overdue for the loans to be written off 180 days 180 days
Interest | Loans: Credit cards | Low    
Disclosure of credit risk exposure [line items]    
Number of days for which the loan receivable is overdue for the loans to be written off 180 days 180 days