Loans, Impaired Loans and Allowance for Credit Losses -Summary of Carrying Value of Exposures by Risk Rating (Detail) - CAD ($) $ in Millions		Oct. 31, 2025	Oct. 31, 2024
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[1]	$ 778,508	$ 767,365
Allowance for credit losses		7,463	6,536
Carrying value of loans net of ACL		771,045	760,829
Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		370,191	350,941
Allowance for credit losses		1,460	1,208
Carrying value of loans net of ACL		368,731	349,733
Residential mortgages [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		223,888	214,427
Residential mortgages [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		88,575	81,969
Residential mortgages [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		24,488	21,277
Residential mortgages [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		9,009	7,841
Residential mortgages [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,218	2,827
Residential mortgages [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	18,110	20,228
Residential mortgages [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,903	2,372
Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		110,567	106,379
Allowance for credit losses		2,432	2,319
Carrying value of loans net of ACL		108,135	104,060
Personal loans [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		31,211	30,865
Personal loans [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		21,826	20,698
Personal loans [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		12,964	13,091
Personal loans [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		15,990	15,378
Personal loans [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,686	2,819
Personal loans [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	24,819	22,411
Personal loans [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		1,071	1,117
Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		18,045	17,374
Allowance for credit losses		1,355	1,160
Carrying value of loans net of ACL		16,690	16,214
Credit Card [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,648	2,385
Credit Card [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,182	2,897
Credit Card [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,818	4,686
Credit Card [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		5,152	4,949
Credit Card [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		1,224	1,044
Credit Card [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	1,021	1,413
Undrawn loan commitments retail [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments net of ACL		174,822	161,214
Undrawn loan commitments retail [Member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		126,936	115,398
Undrawn loan commitments retail [Member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		22,173	17,973
Undrawn loan commitments retail [Member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		9,582	8,150
Undrawn loan commitments retail [Member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		4,678	3,995
Undrawn loan commitments retail [Member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		365	315
Undrawn loan commitments retail [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL	[2]	11,088	15,383
Total retail loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		673,625	635,908
Allowance for credit losses		5,247	4,687
Carrying value of loans net of ACL		668,378	631,221
Total retail loans [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		384,683	363,075
Total retail loans [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		135,756	123,537
Total retail loans [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		51,852	47,204
Total retail loans [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		34,829	32,163
Total retail loans [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		7,493	7,005
Total retail loans [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	55,038	59,435
Total retail loans [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,974	3,489
Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		279,705	292,671
Allowance for credit losses		2,216	1,849
Carrying value of loans net of ACL		277,489	290,822
Business and government [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	2,521	2,215
Business and government [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,270	3,250
Business and government [member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		140,271	148,828
Business and government [member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		129,168	133,549
Business and government [member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,475	4,829
Undrawn loan commitments business and government [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		311,347	312,320
Carrying value of undrawn loan commitments net of ACL		311,172	312,134
Allowance for credit losses		175	186
Undrawn loan commitments business and government [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL	[2]	4,594	3,921
Undrawn loan commitments business and government [Member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		31	32
Undrawn loan commitments business and government [Member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		243,738	244,759
Undrawn loan commitments business and government [Member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		61,977	62,466
Undrawn loan commitments business and government [Member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		1,007	1,142
Total Non Retail Loans [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		591,052	604,991
Allowance for credit losses		2,391	2,035
Carrying value of loans net of ACL		588,661	602,956
Total Non Retail Loans [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	7,115	6,136
Total Non Retail Loans [Member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,301	3,282
Total Non Retail Loans [Member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		384,009	393,587
Total Non Retail Loans [Member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		191,145	196,015
Total Non Retail Loans [Member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		5,482	5,971
Stage one exposure [Member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		339,517	329,902
Allowance for credit losses		196	165
Carrying value of loans net of ACL		339,321	329,737
Stage one exposure [Member] | Residential mortgages [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		219,905	211,165
Stage one exposure [Member] | Residential mortgages [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		83,755	78,344
Stage one exposure [Member] | Residential mortgages [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		15,870	19,205
Stage one exposure [Member] | Residential mortgages [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,002	2,561
Stage one exposure [Member] | Residential mortgages [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		48	13
Stage one exposure [Member] | Residential mortgages [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	16,937	18,614
Stage one exposure [Member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		97,801	95,697
Allowance for credit losses		613	544
Carrying value of loans net of ACL		97,188	95,153
Stage one exposure [Member] | Personal loans [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		31,009	30,865
Stage one exposure [Member] | Personal loans [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		21,075	20,686
Stage one exposure [Member] | Personal loans [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		12,886	13,053
Stage one exposure [Member] | Personal loans [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		10,331	10,535
Stage one exposure [Member] | Personal loans [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		35	76
Stage one exposure [Member] | Personal loans [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	22,465	20,482
Stage one exposure [Member] | Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		14,421	13,865
Allowance for credit losses		338	288
Carrying value of loans net of ACL		14,083	13,577
Stage one exposure [Member] | Credit Card [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,646	2,382
Stage one exposure [Member] | Credit Card [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,171	2,872
Stage one exposure [Member] | Credit Card [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,792	4,631
Stage one exposure [Member] | Credit Card [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,210	3,069
Stage one exposure [Member] | Credit Card [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		20	16
Stage one exposure [Member] | Credit Card [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	582	895
Stage one exposure [Member] | Undrawn loan commitments retail [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments net of ACL		171,452	157,605
Stage one exposure [Member] | Undrawn loan commitments retail [Member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		126,681	115,396
Stage one exposure [Member] | Undrawn loan commitments retail [Member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		22,102	17,947
Stage one exposure [Member] | Undrawn loan commitments retail [Member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		9,569	8,128
Stage one exposure [Member] | Undrawn loan commitments retail [Member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		4,047	3,490
Stage one exposure [Member] | Undrawn loan commitments retail [Member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		14	10
Stage one exposure [Member] | Undrawn loan commitments retail [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL	[2]	9,039	12,634
Stage one exposure [Member] | Total retail loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		623,191	597,069
Allowance for credit losses		1,147	997
Carrying value of loans net of ACL		622,044	596,072
Stage one exposure [Member] | Total retail loans [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		380,241	359,808
Stage one exposure [Member] | Total retail loans [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		130,103	119,849
Stage one exposure [Member] | Total retail loans [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		43,117	45,017
Stage one exposure [Member] | Total retail loans [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		20,590	19,655
Stage one exposure [Member] | Total retail loans [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		117	115
Stage one exposure [Member] | Total retail loans [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	49,023	52,625
Stage one exposure [Member] | Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		263,280	273,948
Allowance for credit losses		713	586
Carrying value of loans net of ACL		262,567	273,362
Stage one exposure [Member] | Business and government [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	2,485	2,190
Stage one exposure [Member] | Business and government [member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		138,789	146,999
Stage one exposure [Member] | Business and government [member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		121,999	124,749
Stage one exposure [Member] | Business and government [member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		7	10
Stage one exposure [Member] | Undrawn loan commitments business and government [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		307,366	307,128
Carrying value of undrawn loan commitments net of ACL		307,225	306,975
Allowance for credit losses		141	153
Stage one exposure [Member] | Undrawn loan commitments business and government [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL	[2]	4,593	3,921
Stage one exposure [Member] | Undrawn loan commitments business and government [Member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		242,637	243,635
Stage one exposure [Member] | Undrawn loan commitments business and government [Member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		60,136	59,572
Stage one exposure [Member] | Total Non Retail Loans [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		570,646	581,076
Allowance for credit losses		854	739
Carrying value of loans net of ACL		569,792	580,337
Stage one exposure [Member] | Total Non Retail Loans [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	7,078	6,111
Stage one exposure [Member] | Total Non Retail Loans [Member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		381,426	390,634
Stage one exposure [Member] | Total Non Retail Loans [Member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		182,135	184,321
Stage one exposure [Member] | Total Non Retail Loans [Member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		7	10
Stage two exposure [Member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		27,771	18,667
Allowance for credit losses		424	398
Carrying value of loans net of ACL		27,347	18,269
Stage two exposure [Member] | Residential mortgages [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,983	3,262
Stage two exposure [Member] | Residential mortgages [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,820	3,625
Stage two exposure [Member] | Residential mortgages [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		8,618	2,072
Stage two exposure [Member] | Residential mortgages [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		6,007	5,280
Stage two exposure [Member] | Residential mortgages [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,170	2,814
Stage two exposure [Member] | Residential mortgages [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	1,173	1,614
Stage two exposure [Member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		11,695	9,565
Allowance for credit losses		1,215	1,154
Carrying value of loans net of ACL		10,480	8,411
Stage two exposure [Member] | Personal loans [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		202
Stage two exposure [Member] | Personal loans [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		751	12
Stage two exposure [Member] | Personal loans [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		78	38
Stage two exposure [Member] | Personal loans [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		5,659	4,843
Stage two exposure [Member] | Personal loans [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,651	2,743
Stage two exposure [Member] | Personal loans [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	2,354	1,929
Stage two exposure [Member] | Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,624	3,509
Allowance for credit losses		1,017	872
Carrying value of loans net of ACL		2,607	2,637
Stage two exposure [Member] | Credit Card [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2	3
Stage two exposure [Member] | Credit Card [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		11	25
Stage two exposure [Member] | Credit Card [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		26	55
Stage two exposure [Member] | Credit Card [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		1,942	1,880
Stage two exposure [Member] | Credit Card [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		1,204	1,028
Stage two exposure [Member] | Credit Card [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	439	518
Stage two exposure [Member] | Undrawn loan commitments retail [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments net of ACL		3,370	3,609
Stage two exposure [Member] | Undrawn loan commitments retail [Member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		255	2
Stage two exposure [Member] | Undrawn loan commitments retail [Member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		71	26
Stage two exposure [Member] | Undrawn loan commitments retail [Member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		13	22
Stage two exposure [Member] | Undrawn loan commitments retail [Member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		631	505
Stage two exposure [Member] | Undrawn loan commitments retail [Member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		351	305
Stage two exposure [Member] | Undrawn loan commitments retail [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL	[2]	2,049	2,749
Stage two exposure [Member] | Total retail loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		46,460	35,350
Allowance for credit losses		2,656	2,424
Carrying value of loans net of ACL		43,804	32,926
Stage two exposure [Member] | Total retail loans [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,442	3,267
Stage two exposure [Member] | Total retail loans [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		5,653	3,688
Stage two exposure [Member] | Total retail loans [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		8,735	2,187
Stage two exposure [Member] | Total retail loans [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		14,239	12,508
Stage two exposure [Member] | Total retail loans [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		7,376	6,890
Stage two exposure [Member] | Total retail loans [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	6,015	6,810
Stage two exposure [Member] | Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		13,155	15,473
Allowance for credit losses		606	475
Carrying value of loans net of ACL		12,549	14,998
Stage two exposure [Member] | Business and government [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	36	25
Stage two exposure [Member] | Business and government [member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		1,482	1,829
Stage two exposure [Member] | Business and government [member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		7,169	8,800
Stage two exposure [Member] | Business and government [member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,468	4,819
Stage two exposure [Member] | Undrawn loan commitments business and government [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		3,950	5,160
Carrying value of undrawn loan commitments net of ACL		3,916	5,127
Allowance for credit losses		34	33
Stage two exposure [Member] | Undrawn loan commitments business and government [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL	[2]	1
Stage two exposure [Member] | Undrawn loan commitments business and government [Member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		1,101	1,124
Stage two exposure [Member] | Undrawn loan commitments business and government [Member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		1,841	2,894
Stage two exposure [Member] | Undrawn loan commitments business and government [Member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		1,007	1,142
Stage two exposure [Member] | Total Non Retail Loans [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		17,105	20,633
Allowance for credit losses		640	508
Carrying value of loans net of ACL		16,465	20,125
Stage two exposure [Member] | Total Non Retail Loans [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	37	25
Stage two exposure [Member] | Total Non Retail Loans [Member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,583	2,953
Stage two exposure [Member] | Total Non Retail Loans [Member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		9,010	11,694
Stage two exposure [Member] | Total Non Retail Loans [Member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		5,475	5,961
Stage three exposure [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	3,270	3,250
Allowance for credit losses	[3]	897	788
Carrying value of loans net of ACL	[3]	2,373	2,462
Stage three exposure [Member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	2,903	2,372
Allowance for credit losses	[3]	840	645
Carrying value of loans net of ACL	[3]	2,063	1,727
Stage three exposure [Member] | Residential mortgages [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	2,903	2,372
Stage three exposure [Member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	1,071	1,117
Allowance for credit losses	[3]	604	621
Carrying value of loans net of ACL	[3]	467	496
Stage three exposure [Member] | Personal loans [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	1,071	1,117
Stage three exposure [Member] | Total retail loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	3,974	3,489
Allowance for credit losses	[3]	1,444	1,266
Carrying value of loans net of ACL	[3]	2,530	2,223
Stage three exposure [Member] | Total retail loans [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	3,974	3,489
Stage three exposure [Member] | Undrawn loan commitments business and government [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL	[3]	31	32
Carrying value of undrawn loan commitments net of ACL	[3]	31	32
Stage three exposure [Member] | Undrawn loan commitments business and government [Member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL	[3]	31	32
Stage three exposure [Member] | Total Non Retail Loans [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	3,301	3,282
Allowance for credit losses	[3]	897	788
Carrying value of loans net of ACL	[3]	2,404	2,494
Stage three exposure [Member] | Total Non Retail Loans [Member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[3]	$ 3,301	$ 3,282

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

[2] Portfolios where the customer account level ‘Probability of Default’ has not been determined have been included in the ‘Loans not graded’ category.

[3] Stage 3 includes purchased or originated credit-impaired loans.