Loans, Impaired Loans and Allowance for Credit Losses -Summary of Carrying Value of Exposures by Risk Rating (Detail) - CAD ($) $ in Millions		Jan. 31, 2026	Oct. 31, 2025
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		$ 762,477	$ 778,508
Allowance for credit losses		7,002	7,463
Carrying value of loans net of ACL		755,475	771,045
Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		368,619	370,191
Allowance for credit losses		1,439	1,460
Carrying value of loans net of ACL		367,180	368,731
Residential mortgages [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		224,653	223,888
Residential mortgages [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		87,577	88,575
Residential mortgages [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		24,571	24,488
Residential mortgages [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		8,129	9,009
Residential mortgages [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,099	3,218
Residential mortgages [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[1]	17,635	18,110
Residential mortgages [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,955	2,903
Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		107,579	110,567
Allowance for credit losses		2,216	2,432
Carrying value of loans net of ACL		105,363	108,135
Personal loans [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		31,402	31,211
Personal loans [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		21,536	21,826
Personal loans [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		12,597	12,964
Personal loans [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		13,630	15,990
Personal loans [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,356	2,686
Personal loans [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[1]	24,995	24,819
Personal loans [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		1,063	1,071
Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		16,112	18,045
Allowance for credit losses		1,215	1,355
Carrying value of loans net of ACL		14,897	16,690
Credit Card [member] | Very low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		2,653	2,648
Credit Card [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,130	3,182
Credit Card [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,414	4,818
Credit Card [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,804	5,152
Credit Card [member] | Very High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		1,128	1,224
Credit Card [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[1]	983	1,021
Credit Card [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		0
Undrawn loan commitments retail [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments net of ACL		172,639	174,822
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		129,963	126,936
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		20,863	22,173
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		7,318	9,582
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		2,582	4,678
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		326	365
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	[1]	11,587	11,088
Undrawn loan commitments retail [Member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		0
Total retail loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		664,949	673,625
Allowance for credit losses		4,870	5,247
Carrying value of loans net of ACL		660,079	668,378
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		388,671	384,683
Total retail loans [member] | Low probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		133,106	135,756
Total retail loans [member] | Medium probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		48,900	51,852
Total retail loans [member] | High probability of default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		28,145	34,829
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		6,909	7,493
Total retail loans [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[1]	55,200	55,038
Total retail loans [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,018	3,974
Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		270,167	279,705
Allowance for credit losses		2,132	2,216
Carrying value of loans net of ACL		268,035	277,489
Business and government [member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[1]	2,579	2,521
Business and government [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,230	3,270
Business and government [member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		136,806	140,271
Business and government [member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		122,945	129,168
Business and government [member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		4,607	4,475
Undrawn loan commitments business and government [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of undrawn loan commitments before ACL		320,687	311,347
Carrying value of undrawn loan commitments net of ACL		320,517	311,172
Allowance for credit losses		170	175
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	[1]	4,558	4,594
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		30	31
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		252,642	243,738
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		62,312	61,977
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		1,145	1,007
Total Non Retail Loans [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		590,854	591,052
Allowance for credit losses		2,302	2,391
Carrying value of loans net of ACL		588,552	588,661
Total Non Retail Loans [Member] | Loans not graded [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[1]	7,137	7,115
Total Non Retail Loans [Member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,260	3,301
Total Non Retail Loans [Member] | Investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		389,448	384,009
Total Non Retail Loans [Member] | Non investment grade [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		185,257	191,145
Total Non Retail Loans [Member] | Watch list [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		5,752	5,482
Stage one exposure [Member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		340,539	339,517
Allowance for credit losses		194	196
Carrying value of loans net of ACL		340,345	339,321
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		221,430	219,905
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		83,734	83,755
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		15,911	15,870
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		2,516	3,002
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		9	48
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	[1]	16,939	16,937
Stage one exposure [Member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		95,731	97,801
Allowance for credit losses		535	613
Carrying value of loans net of ACL		95,196	97,188
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		31,238	31,009
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		20,909	21,075
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		12,538	12,886
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		8,289	10,331
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		44	35
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	[1]	22,713	22,465
Stage one exposure [Member] | Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		12,818	14,421
Allowance for credit losses		257	338
Carrying value of loans net of ACL		12,561	14,083
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		2,652	2,646
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		3,119	3,171
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		4,392	4,792
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		2,062	3,210
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		10	20
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	[1]	583	582
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		169,550	171,452
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		129,741	126,681
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		20,800	22,102
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		7,308	9,569
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		2,174	4,047
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		10	14
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	[1]	9,517	9,039
Stage one exposure [Member] | Total retail loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		618,638	623,191
Allowance for credit losses		986	1,147
Carrying value of loans net of ACL		617,652	622,044
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		385,061	380,241
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		128,562	130,103
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		40,149	43,117
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		15,041	20,590
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		73	117
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	[1]	49,752	49,023
Stage one exposure [Member] | Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		254,617	263,280
Allowance for credit losses		648	713
Carrying value of loans net of ACL		253,969	262,567
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	[1]	2,553	2,485
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		135,630	138,789
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		116,427	121,999
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	7
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		316,345	307,366
Carrying value of undrawn loan commitments net of ACL		316,209	307,225
Allowance for credit losses		136	141
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	[1]	4,557	4,593
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		251,492	242,637
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		60,296	60,136
Stage one exposure [Member] | Total Non Retail Loans [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		570,962	570,646
Allowance for credit losses		784	854
Carrying value of loans net of ACL		570,178	569,792
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	[1]	7,110	7,078
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		387,122	381,426
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		176,723	182,135
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	7
Stage two exposure [Member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		25,125	27,771
Allowance for credit losses		411	424
Carrying value of loans net of ACL		24,714	27,347
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		3,223	3,983
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		3,843	4,820
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		8,660	8,618
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		5,613	6,007
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		3,090	3,170
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	[1]	696	1,173
Stage two exposure [Member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		10,785	11,695
Allowance for credit losses		1,111	1,215
Carrying value of loans net of ACL		9,674	10,480
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		164	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		627	751
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		59	78
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		5,341	5,659
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		2,312	2,651
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	[1]	2,282	2,354
Stage two exposure [Member] | Credit Card [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		3,294	3,624
Allowance for credit losses		958	1,017
Carrying value of loans net of ACL		2,336	2,607
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		1	2
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	11
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		22	26
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		1,742	1,942
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		1,118	1,204
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	[1]	400	439
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		3,089	3,370
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		222	255
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		63	71
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		10	13
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		408	631
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		316	351
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	[1]	2,070	2,049
Stage two exposure [Member] | Total retail loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		42,293	46,460
Allowance for credit losses		2,480	2,656
Carrying value of loans net of ACL		39,813	43,804
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		3,610	4,442
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		4,544	5,653
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		8,751	8,735
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		13,104	14,239
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		6,836	7,376
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	[1]	5,448	6,015
Stage two exposure [Member] | Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		12,320	13,155
Allowance for credit losses		601	606
Carrying value of loans net of ACL		11,719	12,549
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	[1]	26	36
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		1,176	1,482
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		6,518	7,169
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		4,600	4,468
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		4,312	3,950
Carrying value of undrawn loan commitments net of ACL		4,278	3,916
Allowance for credit losses		34	34
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	[1]	1	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		1,150	1,101
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		2,016	1,841
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		1,145	1,007
Stage two exposure [Member] | Total Non Retail Loans [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL		16,632	17,105
Allowance for credit losses		635	640
Carrying value of loans net of ACL		15,997	16,465
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	[1]	27	37
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		2,326	2,583
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		8,534	9,010
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		5,745	5,475
Stage three exposure [Member] | Residential mortgages [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	2,955	2,903
Allowance for credit losses	[2]	834	840
Carrying value of loans net of ACL	[2]	2,121	2,063
Stage three exposure [Member] | Residential mortgages [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	2,955	2,903
Stage three exposure [Member] | Personal loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	1,063	1,071
Allowance for credit losses	[2]	570	604
Carrying value of loans net of ACL	[2]	493	467
Stage three exposure [Member] | Personal loans [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	1,063	1,071
Stage three exposure [Member] | Total retail loans [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	4,018	3,974
Allowance for credit losses	[2]	1,404	1,444
Carrying value of loans net of ACL	[2]	2,614	2,530
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	[2]	4,018	3,974
Stage three exposure [Member] | Business and government [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	3,230	3,270
Allowance for credit losses	[2]	883	897
Carrying value of loans net of ACL	[2]	2,347	2,373
Stage three exposure [Member] | Business and government [member] | Default [member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	3,230	3,270
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	[2]	30	31
Carrying value of undrawn loan commitments net of ACL	[2]	30	31
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	[2]	30	31
Stage three exposure [Member] | Total Non Retail Loans [Member]
Disclosure of detailed information about financial instruments [line items]
Carrying value of loans before ACL	[2]	3,260	3,301
Allowance for credit losses	[2]	883	897
Carrying value of loans net of ACL	[2]	2,377	2,404
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	[2]	$ 3,260	$ 3,301

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

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