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
9 Months Ended 12 Months Ended
Jul. 31, 2026
Oct. 31, 2025
Disclosure of credit risk exposure [line items]    
ACL $ 6,030 $ 5,739
Loans: Residential mortgages    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 196,694 195,787
Loans: Residential mortgages | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 196,924 196,033
ACL 230 246
Loans: Residential mortgages | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,135 903
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 117,339 111,143
Loans: Residential mortgages | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 50,557 53,199
Loans: Residential mortgages | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 11,397 13,761
Loans: Residential mortgages | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 3,679 3,272
Loans: Residential mortgages | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 12,817 13,754
Loans: Consumer instalment and other personal    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 93,378 91,867
Loans: Consumer instalment and other personal | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 94,269 92,741
ACL 891 874
Loans: Consumer instalment and other personal | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 614 627
Loans: Consumer instalment and other personal | Gross carrying amount | Exceptionally low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 10,539 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 41,356 21,997
Loans: Consumer instalment and other personal | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 9,230 28,920
Loans: Consumer instalment and other personal | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 13,073 12,557
Loans: Consumer instalment and other personal | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 3,110 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 16,347 15,821
Loans: Credit cards    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans $ 11,359 $ 11,997
Loans: Credit cards | Principal | 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
Loans: Credit cards | Interest | 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
Loans: Credit cards | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans $ 12,041 $ 12,649
ACL 682 652
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 1,683 1,643
Loans: Credit cards | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 2,106 2,133
Loans: Credit cards | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,847 1,926
Loans: Credit cards | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 4,184 4,741
Loans: Credit cards | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,846 1,824
Loans: Credit cards | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 375 382
Loans: Business and government    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 396,496 378,221
Loans: Business and government | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 399,940 381,499
ACL 3,444 3,278
Loans: Business and government | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,054 5,561
Loans: Business and government | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 215,092 192,580
Loans: Business and government | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 162,025 161,769
Loans: Business and government | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 17,769 21,589
Total gross loans and acceptances | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 703,174 682,922
Total net loans and acceptances    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 697,927 677,872
Commitments and financial guarantee contracts    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 317,790 293,646
Commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
ACL 783 689
Commitments and financial guarantee contracts | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 1,704 1,660
Commitments and financial guarantee contracts | Gross carrying amount | Investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 226,755 204,457
Commitments and financial guarantee contracts | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 82,277 79,126
Commitments and financial guarantee contracts | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 7,837 9,092
Gross commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 318,573 294,335
Stage 1 | Loans: Residential mortgages    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 180,331 180,482
Stage 1 | Loans: Residential mortgages | FVTPL loans    
Disclosure of credit risk exposure [line items]    
FVTPL loans 67 79
Stage 1 | Loans: Residential mortgages | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 180,379 180,538
ACL 48 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 116,655 110,299
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 44,788 50,148
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 6,377 7,048
Stage 1 | Loans: Residential mortgages | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 287 240
Stage 1 | Loans: Residential mortgages | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 12,272 12,802
Stage 1 | Loans: Consumer instalment and other personal    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 80,249 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 80,432 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 10,523 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 40,307 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 7,390 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 6,530 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 660 670
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 15,022 14,812
Stage 1 | Loans: Credit cards    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 9,937 9,895
Stage 1 | Loans: Credit cards | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 10,095 10,020
ACL 158 125
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 1,683 1,643
Stage 1 | Loans: Credit cards | Gross carrying amount | Very low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 2,091 2,129
Stage 1 | Loans: Credit cards | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,786 1,846
Stage 1 | Loans: Credit cards | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 3,382 3,550
Stage 1 | Loans: Credit cards | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 867 592
Stage 1 | Loans: Credit cards | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 286 260
Stage 1 | Loans: Business and government    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 341,786 327,143
Stage 1 | Loans: Business and government | FVTPL loans    
Disclosure of credit risk exposure [line items]    
FVTPL loans 12,649 13,231
Stage 1 | Loans: Business and government | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 342,536 327,899
ACL 750 756
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 209,777 188,707
Stage 1 | Loans: Business and government | Gross carrying amount | Sub-investment grade    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 132,650 139,069
Stage 1 | Loans: Business and government | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 109 123
Stage 1 | Total gross loans and acceptances | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 613,442 599,114
Stage 1 | Total net loans and acceptances    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 612,303 597,995
Stage 1 | Commitments and financial guarantee contracts    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 281,767 268,056
Stage 1 | Commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
ACL 335 256
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 220,375 202,913
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 61,727 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 0 6
Stage 1 | Gross commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 282,102 268,312
Stage 2 | Loans: Residential mortgages    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 15,263 14,414
Stage 2 | Loans: Residential mortgages | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 15,410 14,592
ACL 147 178
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 684 844
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Low    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,769 3,051
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,020 6,713
Stage 2 | Loans: Residential mortgages | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 3,392 3,032
Stage 2 | Loans: Residential mortgages | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 545 952
Stage 2 | Loans: Consumer instalment and other personal    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 12,671 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 13,223 11,457
ACL 552 532
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 16 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 1,049 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 1,840 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 6,543 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 2,450 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 1,325 1,009
Stage 2 | Loans: Credit cards    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,422 2,102
Stage 2 | Loans: Credit cards | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,946 2,629
ACL 524 527
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 61 80
Stage 2 | Loans: Credit cards | Gross carrying amount | Medium    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 802 1,191
Stage 2 | Loans: Credit cards | Gross carrying amount | High    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 979 1,232
Stage 2 | Loans: Credit cards | Gross carrying amount | Not Rated    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 89 122
Stage 2 | Loans: Business and government    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 50,675 46,319
Stage 2 | Loans: Business and government | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 52,350 48,039
ACL 1,675 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 5,315 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 29,375 22,700
Stage 2 | Loans: Business and government | Gross carrying amount | Watchlist    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 17,660 21,466
Stage 2 | Total gross loans and acceptances | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 82,929 76,717
Stage 2 | Total net loans and acceptances    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 80,031 73,760
Stage 2 | Commitments and financial guarantee contracts    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 34,377 23,986
Stage 2 | Commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
ACL 390 377
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 6,380 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 20,550 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 7,837 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 34,767 24,363
Stage 3 | Loans: Residential mortgages    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,100 891
Stage 3 | Loans: Residential mortgages | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,135 903
ACL 35 12
Stage 3 | Loans: Residential mortgages | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 1,135 903
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 458 467
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 614 627
ACL 156 160
Stage 3 | Loans: Consumer instalment and other personal | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 614 627
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 4,035 4,759
Stage 3 | Loans: Business and government | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,054 5,561
ACL 1,019 802
Stage 3 | Loans: Business and government | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,054 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 6,803 7,091
Stage 3 | Total net loans and acceptances    
Disclosure of credit risk exposure [line items]    
Credit risk exposure for loans 5,593 6,117
Stage 3 | Commitments and financial guarantee contracts    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 1,646 1,604
Stage 3 | Commitments and financial guarantee contracts | Gross carrying amount    
Disclosure of credit risk exposure [line items]    
ACL 58 56
Stage 3 | Commitments and financial guarantee contracts | Gross carrying amount | Impaired    
Disclosure of credit risk exposure [line items]    
Commitments and financial guarantee contracts 1,704 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 $ 1,704 $ 1,660