Fair value of financial instruments - Changes in Fair Value Measurement for Instruments Measured on a Recurring Basis and Categorized in Level 3 (Detail) - CAD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Transfers into Level 3 |
$ 0
|
$ 0
|
|
|
| Recurring [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
|
|
$ 931,102
|
|
| Fair value assets, ending balance |
974,849
|
|
974,849
|
|
| Fair value liabilities, beginning balance |
|
|
712,835
|
|
| Fair value liabilities, ending balance |
719,851
|
|
719,851
|
|
| Recurring [member] | Level 3 [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
3,978
|
4,175
|
4,033
|
$ 4,183
|
| Gains (losses) included in earnings |
(97)
|
149
|
(287)
|
59
|
| Gains (losses) included in OCI |
0
|
(65)
|
(47)
|
31
|
| Purchases (issuances) |
618
|
254
|
801
|
463
|
| Settlement (sales) and other |
(37)
|
(832)
|
(40)
|
(958)
|
| Transfers into Level 3 |
90
|
(10)
|
35
|
(225)
|
| Transfers out of Level 3 |
17
|
21
|
74
|
139
|
| Fair value assets, ending balance |
4,569
|
3,692
|
4,569
|
3,692
|
| Gains (losses) included in earnings for positions still held |
(59)
|
95
|
(94)
|
23
|
| Fair value liabilities, beginning balance |
(189)
|
(634)
|
(301)
|
(478)
|
| Gains (losses) included in earnings |
(9)
|
8
|
(15)
|
9
|
| Gains (losses) included in OCI |
0
|
7
|
3
|
1
|
| Purchases (issuances) |
(72)
|
(169)
|
(113)
|
(401)
|
| Settlement (sales) and other |
52
|
26
|
57
|
88
|
| Transfers into Level 3 |
(110)
|
(44)
|
(217)
|
(210)
|
| Transfers out of Level 3 |
140
|
264
|
398
|
449
|
| Fair value liabilities, ending balance |
(188)
|
(542)
|
(188)
|
(542)
|
| Gains (losses) included in earnings for positions still held |
|
9
|
0
|
46
|
| Recurring [member] | Level 3 [member] | Investment [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
735
|
697
|
745
|
680
|
| Gains (losses) included in earnings |
1
|
|
2
|
|
| Gains (losses) included in OCI |
8
|
10
|
3
|
37
|
| Purchases (issuances) |
2
|
32
|
2
|
32
|
| Settlement (sales) and other |
(5)
|
(4)
|
(11)
|
(14)
|
| Fair value assets, ending balance |
741
|
735
|
741
|
735
|
| Gains (losses) included in earnings for positions still held |
1
|
|
1
|
|
| Recurring [member] | Level 3 [member] | Mortgage-backed securities [member] | Investment [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
30
|
32
|
29
|
31
|
| Gains (losses) included in OCI |
(1)
|
(1)
|
0
|
|
| Fair value assets, ending balance |
29
|
31
|
29
|
31
|
| Gains (losses) included in earnings for positions still held |
|
|
0
|
|
| Recurring [member] | Level 3 [member] | Corporate debt and other debt [member] | Investment [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
127
|
142
|
134
|
143
|
| Gains (losses) included in earnings |
1
|
|
2
|
|
| Gains (losses) included in OCI |
(1)
|
(4)
|
(5)
|
2
|
| Settlement (sales) and other |
(4)
|
(4)
|
(8)
|
(11)
|
| Fair value assets, ending balance |
123
|
134
|
123
|
134
|
| Gains (losses) included in earnings for positions still held |
0
|
|
1
|
|
| Recurring [member] | Level 3 [member] | Equities [member] | Investment [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
578
|
523
|
582
|
506
|
| Gains (losses) included in OCI |
10
|
15
|
8
|
35
|
| Purchases (issuances) |
2
|
32
|
2
|
32
|
| Settlement (sales) and other |
(1)
|
0
|
(3)
|
(3)
|
| Fair value assets, ending balance |
589
|
570
|
589
|
570
|
| Gains (losses) included in earnings for positions still held |
1
|
|
0
|
|
| Recurring [member] | Level 3 [member] | Interest rate contracts [member] | Net derivative balances, category [Member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
(657)
|
(535)
|
(608)
|
(493)
|
| Gains (losses) included in earnings |
18
|
(47)
|
(33)
|
(35)
|
| Gains (losses) included in OCI |
|
2
|
0
|
2
|
| Purchases (issuances) |
10
|
28
|
13
|
(39)
|
| Settlement (sales) and other |
3
|
2
|
3
|
5
|
| Transfers into Level 3 |
1
|
7
|
0
|
9
|
| Transfers out of Level 3 |
(24)
|
21
|
(24)
|
29
|
| Fair value assets, ending balance |
(649)
|
(522)
|
(649)
|
(522)
|
| Gains (losses) included in earnings for positions still held |
6
|
(46)
|
(38)
|
(34)
|
| Recurring [member] | Level 3 [member] | Foreign exchange contracts [member] | Net derivative balances, category [Member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
(44)
|
(66)
|
56
|
(51)
|
| Gains (losses) included in earnings |
(10)
|
3
|
(125)
|
(11)
|
| Gains (losses) included in OCI |
(1)
|
3
|
0
|
3
|
| Purchases (issuances) |
(16)
|
0
|
(49)
|
1
|
| Settlement (sales) and other |
0
|
(1)
|
47
|
(1)
|
| Transfers into Level 3 |
10
|
|
10
|
|
| Transfers out of Level 3 |
19
|
8
|
19
|
6
|
| Fair value assets, ending balance |
(42)
|
(53)
|
(42)
|
(53)
|
| Gains (losses) included in earnings for positions still held |
(8)
|
2
|
1
|
(23)
|
| Recurring [member] | Level 3 [member] | Credit Derivatives [Member] | Net derivative balances, category [Member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
1
|
|
2
|
|
| Gains (losses) included in earnings |
0
|
|
(1)
|
|
| Fair value assets, ending balance |
1
|
|
1
|
|
| Recurring [member] | Level 3 [member] | Other contracts [member] | Net derivative balances, category [Member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
(234)
|
(455)
|
(256)
|
(303)
|
| Gains (losses) included in earnings |
(39)
|
101
|
(5)
|
80
|
| Gains (losses) included in OCI |
1
|
16
|
6
|
3
|
| Purchases (issuances) |
(3)
|
0
|
(16)
|
(12)
|
| Settlement (sales) and other |
2
|
3
|
8
|
7
|
| Transfers into Level 3 |
(35)
|
(49)
|
(109)
|
(274)
|
| Transfers out of Level 3 |
35
|
(8)
|
99
|
107
|
| Fair value assets, ending balance |
(273)
|
(392)
|
(273)
|
(392)
|
| Gains (losses) included in earnings for positions still held |
(26)
|
125
|
16
|
109
|
| Recurring [member] | Level 3 [member] | Valuation adjustments [member] | Net derivative balances, category [Member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
(43)
|
8
|
(79)
|
18
|
| Purchases (issuances) |
(18)
|
16
|
(29)
|
6
|
| Settlement (sales) and other |
(11)
|
1
|
36
|
1
|
| Fair value assets, ending balance |
(72)
|
25
|
(72)
|
25
|
| Recurring [member] | Level 3 [member] | Other assets [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
3
|
7
|
4
|
7
|
| Settlement (sales) and other |
(1)
|
(2)
|
(2)
|
(2)
|
| Fair value assets, ending balance |
2
|
5
|
2
|
5
|
| Recurring [member] | Level 3 [member] | Loans [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
1,357
|
1,876
|
1,274
|
1,781
|
| Gains (losses) included in earnings |
(28)
|
98
|
(78)
|
95
|
| Gains (losses) included in OCI |
(4)
|
(23)
|
(6)
|
0
|
| Purchases (issuances) |
425
|
51
|
548
|
141
|
| Settlement (sales) and other |
(1)
|
(795)
|
(2)
|
(814)
|
| Transfers into Level 3 |
86
|
0
|
106
|
7
|
| Transfers out of Level 3 |
0
|
0
|
(7)
|
(3)
|
| Fair value assets, ending balance |
1,835
|
1,207
|
1,835
|
1,207
|
| Gains (losses) included in earnings for positions still held |
(25)
|
20
|
(101)
|
19
|
| Recurring [member] | Level 3 [member] | Trading Securities [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
2,860
|
2,643
|
2,895
|
2,544
|
| Gains (losses) included in earnings |
(39)
|
(6)
|
(47)
|
(70)
|
| Gains (losses) included in OCI |
(4)
|
(73)
|
(50)
|
(14)
|
| Purchases (issuances) |
218
|
127
|
332
|
334
|
| Settlement (sales) and other |
(24)
|
(36)
|
(119)
|
(140)
|
| Transfers into Level 3 |
28
|
32
|
28
|
33
|
| Transfers out of Level 3 |
(13)
|
|
(13)
|
|
| Fair value assets, ending balance |
3,026
|
2,687
|
3,026
|
2,687
|
| Gains (losses) included in earnings for positions still held |
(7)
|
(6)
|
27
|
(48)
|
| Recurring [member] | Level 3 [member] | Trading Securities [member] | Corporate debt and other debt [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
30
|
|
32
|
|
| Gains (losses) included in earnings |
0
|
|
(1)
|
|
| Gains (losses) included in OCI |
0
|
|
(1)
|
|
| Purchases (issuances) |
1
|
|
1
|
|
| Settlement (sales) and other |
(1)
|
|
(1)
|
|
| Transfers into Level 3 |
|
32
|
0
|
32
|
| Transfers out of Level 3 |
(13)
|
|
(13)
|
|
| Fair value assets, ending balance |
17
|
32
|
17
|
32
|
| Gains (losses) included in earnings for positions still held |
0
|
|
|
|
| Recurring [member] | Level 3 [member] | Trading Securities [member] | Equities [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value assets, beginning balance |
2,830
|
2,643
|
2,863
|
2,544
|
| Gains (losses) included in earnings |
(39)
|
(6)
|
(46)
|
(70)
|
| Gains (losses) included in OCI |
(4)
|
(73)
|
(49)
|
(14)
|
| Purchases (issuances) |
217
|
127
|
331
|
334
|
| Settlement (sales) and other |
(23)
|
(36)
|
(118)
|
(140)
|
| Transfers into Level 3 |
28
|
0
|
28
|
1
|
| Transfers out of Level 3 |
|
|
0
|
|
| Fair value assets, ending balance |
3,009
|
2,655
|
3,009
|
2,655
|
| Gains (losses) included in earnings for positions still held |
(7)
|
(6)
|
27
|
(48)
|
| Recurring [member] | Level 3 [member] | Deposits - Personal [member] |
|
|
|
|
| Disclosure of fair value measurement of assets and liabilities [line Items] |
|
|
|
|
| Fair value liabilities, beginning balance |
(189)
|
(634)
|
(301)
|
(478)
|
| Gains (losses) included in earnings |
(9)
|
8
|
(15)
|
9
|
| Gains (losses) included in OCI |
0
|
7
|
3
|
1
|
| Purchases (issuances) |
(72)
|
(169)
|
(113)
|
(401)
|
| Settlement (sales) and other |
52
|
26
|
57
|
88
|
| Transfers into Level 3 |
(110)
|
(44)
|
(217)
|
(210)
|
| Transfers out of Level 3 |
140
|
264
|
398
|
449
|
| Fair value liabilities, ending balance |
$ (188)
|
(542)
|
(188)
|
(542)
|
| Gains (losses) included in earnings for positions still held |
|
$ 9
|
$ 0
|
$ 46
|