Fair Value Measurements (Schedule of Reconciliation of Changes in Fair Value for Level 3 Assets and Liabilities) (Details) - Level 3 of fair value hierarchy [member] - CAD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
| Derivative financial liabilities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
$ (149)
|
$ (233)
|
$ (280)
|
$ (191)
|
| Total realized and unrealized gains (losses) included in income |
0
|
47
|
78
|
(14)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
1
|
0
|
5
|
0
|
| Movements Sales/Settlements |
(3)
|
1
|
(7)
|
10
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
(3)
|
(1)
|
22
|
6
|
| Transfers Out of Level 3 |
100
|
4
|
128
|
7
|
| Fair value ending balance |
(54)
|
(182)
|
(54)
|
(182)
|
| Change in Unrealized gain (losses) on instruments still held |
94
|
23
|
189
|
1
|
| Derivative financial liabilities [member] | Interest rate contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(77)
|
(81)
|
(68)
|
(158)
|
| Total realized and unrealized gains (losses) included in income |
11
|
15
|
0
|
83
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
0
|
| Movements Sales/Settlements |
2
|
2
|
4
|
11
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
(64)
|
(64)
|
(64)
|
(64)
|
| Change in Unrealized gain (losses) on instruments still held |
(8)
|
(5)
|
(3)
|
85
|
| Derivative financial liabilities [member] | Foreign exchange contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(1)
|
(1)
|
(2)
|
1
|
| Total realized and unrealized gains (losses) included in income |
1
|
4
|
5
|
(13)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
0
|
| Movements Sales/Settlements |
0
|
(1)
|
0
|
2
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
(3)
|
(1)
|
(3)
|
8
|
| Transfers Out of Level 3 |
1
|
1
|
(2)
|
4
|
| Fair value ending balance |
(2)
|
2
|
(2)
|
2
|
| Change in Unrealized gain (losses) on instruments still held |
2
|
6
|
3
|
2
|
| Derivative financial liabilities [member] | Equity contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(107)
|
(131)
|
(155)
|
(24)
|
| Total realized and unrealized gains (losses) included in income |
0
|
(3)
|
21
|
(106)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
1
|
0
|
1
|
0
|
| Movements Sales/Settlements |
0
|
(1)
|
(5)
|
(3)
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
0
|
1
|
(2)
|
| Transfers Out of Level 3 |
117
|
3
|
148
|
3
|
| Fair value ending balance |
11
|
(132)
|
11
|
(132)
|
| Change in Unrealized gain (losses) on instruments still held |
118
|
(4)
|
144
|
(106)
|
| Derivative financial liabilities [member] | Commodity and other contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
36
|
(20)
|
(55)
|
(10)
|
| Total realized and unrealized gains (losses) included in income |
(12)
|
31
|
52
|
22
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
4
|
0
|
| Movements Sales/Settlements |
(5)
|
1
|
(6)
|
0
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
0
|
24
|
0
|
| Transfers Out of Level 3 |
(18)
|
0
|
(18)
|
0
|
| Fair value ending balance |
1
|
12
|
1
|
12
|
| Change in Unrealized gain (losses) on instruments still held |
(18)
|
26
|
45
|
20
|
| Financial liabilities at fair value through profit or loss, category [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(4)
|
(1)
|
(2)
|
(24)
|
| Total realized and unrealized gains (losses) included in income |
(3)
|
0
|
(5)
|
7
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
(4)
|
(5)
|
(13)
|
(19)
|
| Movements Sales/Settlements |
8
|
4
|
17
|
34
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
(3)
|
(2)
|
(3)
|
(2)
|
| Change in Unrealized gain (losses) on instruments still held |
0
|
0
|
(9)
|
1
|
| Trading Deposits [Member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(158)
|
(384)
|
(273)
|
(505)
|
| Total realized and unrealized gains (losses) included in income |
(3)
|
3
|
36
|
31
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
(16)
|
(45)
|
(22)
|
(169)
|
| Movements Sales/Settlements |
33
|
27
|
107
|
243
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
(121)
|
1
|
(113)
|
2
|
| Fair value ending balance |
(265)
|
(398)
|
(265)
|
(398)
|
| Change in Unrealized gain (losses) on instruments still held |
12
|
4
|
56
|
38
|
| Non trading financial assets at fair value through profit or loss [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
1,530
|
1,253
|
1,567
|
1,233
|
| Total realized and unrealized gains (losses) included in income |
33
|
22
|
70
|
12
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
46
|
220
|
166
|
296
|
| Movements Sales/ Settlements |
(38)
|
(11)
|
(236)
|
47
|
| Transfer Into Level 3 |
0
|
0
|
4
|
0
|
| Transfers Out of Level 3 |
(2)
|
0
|
(2)
|
10
|
| Fair value ending balance |
1,569
|
1,484
|
1,569
|
1,484
|
| Change in Unrealized gain (losses) on instruments still held |
3
|
12
|
35
|
(16)
|
| Non trading financial assets at fair value through profit or loss [member] | Loans 1 [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
1
|
|
0
|
|
| Total realized and unrealized gains (losses) included in income |
0
|
|
0
|
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
|
0
|
|
| Movements purchases/Issuances |
0
|
|
1
|
|
| Movements Sales/ Settlements |
0
|
|
0
|
|
| Transfer Into Level 3 |
0
|
|
0
|
|
| Transfers Out of Level 3 |
0
|
|
0
|
|
| Fair value ending balance |
1
|
|
1
|
|
| Change in Unrealized gain (losses) on instruments still held |
0
|
|
0
|
|
| Non trading financial assets at fair value through profit or loss [member] | Securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
1,529
|
1,253
|
1,567
|
1,233
|
| Total realized and unrealized gains (losses) included in income |
33
|
22
|
70
|
12
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
46
|
220
|
165
|
296
|
| Movements Sales/ Settlements |
(38)
|
(11)
|
(236)
|
47
|
| Transfer Into Level 3 |
0
|
0
|
4
|
0
|
| Transfers Out of Level 3 |
(2)
|
0
|
(2)
|
10
|
| Fair value ending balance |
1,568
|
1,484
|
1,568
|
1,484
|
| Change in Unrealized gain (losses) on instruments still held |
3
|
12
|
35
|
(16)
|
| Financial assets measured at fair value through other comprehensive income, category [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
2,143
|
2,808
|
1,911
|
3,362
|
| Total realized and unrealized gains (losses) included in income |
9
|
0
|
9
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
14
|
2
|
24
|
5
|
| Movements purchases/Issuances |
425
|
2
|
735
|
4
|
| Movements Sales/ Settlements |
(9)
|
(659)
|
(97)
|
1,218
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
2,582
|
2,153
|
2,582
|
2,153
|
| Change in Unrealized gain (losses) on instruments still held |
12
|
2
|
20
|
0
|
| Financial assets measured at fair value through other comprehensive income, category [member] | Other debt securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
0
|
0
|
0
|
7
|
| Total realized and unrealized gains (losses) included in income |
0
|
0
|
0
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
0
|
| Movements Sales/ Settlements |
0
|
0
|
0
|
7
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
0
|
0
|
0
|
0
|
| Change in Unrealized gain (losses) on instruments still held |
0
|
0
|
0
|
0
|
| Financial assets measured at fair value through other comprehensive income, category [member] | Equity securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
2,143
|
2,808
|
1,911
|
3,355
|
| Total realized and unrealized gains (losses) included in income |
9
|
0
|
9
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
14
|
2
|
24
|
5
|
| Movements purchases/Issuances |
425
|
2
|
735
|
4
|
| Movements Sales/ Settlements |
(9)
|
(659)
|
(97)
|
1,211
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
2,582
|
2,153
|
2,582
|
2,153
|
| Change in Unrealized gain (losses) on instruments still held |
12
|
2
|
20
|
0
|
| Trading loans, securities and other [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
499
|
34
|
92
|
38
|
| Total realized and unrealized gains (losses) included in income |
(42)
|
(1)
|
(166)
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
19
|
0
|
568
|
23
|
| Movements Sales/ Settlements |
(15)
|
(1)
|
(37)
|
30
|
| Transfer Into Level 3 |
6
|
5
|
11
|
6
|
| Transfers Out of Level 3 |
0
|
(2)
|
(1)
|
2
|
| Fair value ending balance |
467
|
35
|
467
|
35
|
| Change in Unrealized gain (losses) on instruments still held |
0
|
(1)
|
(4)
|
(3)
|
| Trading loans, securities and other [member] | Other debt securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
48
|
6
|
67
|
26
|
| Total realized and unrealized gains (losses) included in income |
0
|
(1)
|
(1)
|
(1)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
1
|
| Movements Sales/ Settlements |
4
|
(1)
|
(18)
|
23
|
| Transfer Into Level 3 |
6
|
5
|
11
|
6
|
| Transfers Out of Level 3 |
0
|
(2)
|
(1)
|
2
|
| Fair value ending balance |
58
|
7
|
58
|
7
|
| Change in Unrealized gain (losses) on instruments still held |
0
|
(1)
|
(4)
|
(2)
|
| Trading loans, securities and other [member] | Equity securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
25
|
28
|
25
|
12
|
| Total realized and unrealized gains (losses) included in income |
1
|
0
|
1
|
1
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
19
|
0
|
19
|
22
|
| Movements Sales/ Settlements |
(19)
|
0
|
(19)
|
7
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
26
|
28
|
26
|
28
|
| Change in Unrealized gain (losses) on instruments still held |
0
|
$ 0
|
0
|
$ (1)
|
| Trading loans, securities and other [member] | Trading loans [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
426
|
|
0
|
|
| Total realized and unrealized gains (losses) included in income |
(43)
|
|
(166)
|
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
|
0
|
|
| Movements purchases/Issuances |
0
|
|
549
|
|
| Movements Sales/ Settlements |
0
|
|
0
|
|
| Transfer Into Level 3 |
0
|
|
0
|
|
| Transfers Out of Level 3 |
0
|
|
0
|
|
| Fair value ending balance |
383
|
|
383
|
|
| Change in Unrealized gain (losses) on instruments still held |
$ 0
|
|
$ 0
|
|