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 |
6 Months Ended |
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
| Derivative financial liabilities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
$ (200)
|
$ (167)
|
$ (280)
|
$ (191)
|
| Total realized and unrealized gains (losses) included in income |
29
|
(63)
|
78
|
(62)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
4
|
0
|
4
|
0
|
| Movements Sales/Settlements |
(4)
|
(1)
|
(4)
|
11
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
24
|
(2)
|
25
|
7
|
| Transfers Out of Level 3 |
(2)
|
0
|
28
|
2
|
| Fair value ending balance |
(149)
|
(233)
|
(149)
|
(233)
|
| Change in Unrealized gain (losses) on instruments still held |
19
|
(47)
|
87
|
(46)
|
| Derivative financial liabilities [member] | Interest rate contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(62)
|
(155)
|
(68)
|
(158)
|
| Total realized and unrealized gains (losses) included in income |
(15)
|
74
|
(11)
|
67
|
| 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
|
2
|
10
|
| 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 |
(77)
|
(81)
|
(77)
|
(81)
|
| Change in Unrealized gain (losses) on instruments still held |
(24)
|
68
|
(16)
|
70
|
| Derivative financial liabilities [member] | Foreign exchange contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(1)
|
21
|
(2)
|
1
|
| Total realized and unrealized gains (losses) included in income |
0
|
(23)
|
4
|
(16)
|
| 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
|
3
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
2
|
0
|
9
|
| Transfers Out of Level 3 |
0
|
0
|
(3)
|
2
|
| Fair value ending balance |
(1)
|
(1)
|
(1)
|
(1)
|
| Change in Unrealized gain (losses) on instruments still held |
0
|
(8)
|
0
|
(5)
|
| Derivative financial liabilities [member] | Equity contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(120)
|
(29)
|
(155)
|
(24)
|
| Total realized and unrealized gains (losses) included in income |
19
|
(98)
|
21
|
(103)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
0
|
| Movements Sales/Settlements |
(4)
|
0
|
(5)
|
(2)
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
(4)
|
1
|
(2)
|
| Transfers Out of Level 3 |
(2)
|
0
|
31
|
0
|
| Fair value ending balance |
(107)
|
(131)
|
(107)
|
(131)
|
| Change in Unrealized gain (losses) on instruments still held |
18
|
(95)
|
27
|
(102)
|
| Derivative financial liabilities [member] | Commodity and other contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(17)
|
(4)
|
(55)
|
(10)
|
| Total realized and unrealized gains (losses) included in income |
25
|
(16)
|
64
|
(10)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
4
|
0
|
4
|
0
|
| Movements Sales/Settlements |
0
|
0
|
(1)
|
0
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
24
|
0
|
24
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
36
|
(20)
|
36
|
(20)
|
| Change in Unrealized gain (losses) on instruments still held |
25
|
(12)
|
76
|
(9)
|
| 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 |
0
|
(1)
|
(2)
|
(24)
|
| Total realized and unrealized gains (losses) included in income |
(7)
|
7
|
(2)
|
6
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
(3)
|
(7)
|
(9)
|
(14)
|
| Movements Sales/Settlements |
6
|
0
|
9
|
31
|
| 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 |
(4)
|
(1)
|
(4)
|
(1)
|
| Change in Unrealized gain (losses) on instruments still held |
6
|
7
|
(2)
|
6
|
| Trading Deposits [Member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(224)
|
(459)
|
(273)
|
(505)
|
| Total realized and unrealized gains (losses) included in income |
18
|
24
|
39
|
28
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
(6)
|
(52)
|
(6)
|
(124)
|
| Movements Sales/Settlements |
53
|
103
|
74
|
217
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
1
|
0
|
8
|
0
|
| Fair value ending balance |
(158)
|
(384)
|
(158)
|
(384)
|
| Change in Unrealized gain (losses) on instruments still held |
20
|
27
|
44
|
34
|
| 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 |
1,622
|
1,287
|
1,567
|
1,233
|
| Total realized and unrealized gains (losses) included in income |
39
|
(40)
|
43
|
(14)
|
| Total realized and unrealized gains (losses) included in OCI |
(2)
|
0
|
(6)
|
0
|
| Movements purchases/Issuances |
51
|
39
|
120
|
54
|
| Movements Sales/ Settlements |
(184)
|
(20)
|
(198)
|
37
|
| Transfer Into Level 3 |
4
|
0
|
4
|
30
|
| Transfers Out of Level 3 |
0
|
(13)
|
0
|
13
|
| Fair value ending balance |
1,530
|
1,253
|
1,530
|
1,253
|
| Change in Unrealized gain (losses) on instruments still held |
22
|
(43)
|
32
|
(30)
|
| 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 |
0
|
|
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 |
1
|
|
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 |
1,622
|
1,287
|
1,567
|
1,233
|
| Total realized and unrealized gains (losses) included in income |
39
|
(40)
|
43
|
(14)
|
| Total realized and unrealized gains (losses) included in OCI |
(2)
|
0
|
(6)
|
0
|
| Movements purchases/Issuances |
50
|
39
|
119
|
54
|
| Movements Sales/ Settlements |
(184)
|
(20)
|
(198)
|
37
|
| Transfer Into Level 3 |
4
|
0
|
4
|
30
|
| Transfers Out of Level 3 |
0
|
(13)
|
0
|
13
|
| Fair value ending balance |
1,529
|
1,253
|
1,529
|
1,253
|
| Change in Unrealized gain (losses) on instruments still held |
22
|
(43)
|
32
|
(30)
|
| 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 |
2,159
|
3,177
|
1,911
|
3,362
|
| Total realized and unrealized gains (losses) included in income |
0
|
0
|
0
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
8
|
3
|
149
|
3
|
| Movements purchases/Issuances |
1
|
1
|
171
|
3
|
| Movements Sales/ Settlements |
(25)
|
(373)
|
(88)
|
560
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
2,143
|
2,808
|
2,143
|
2,808
|
| Change in Unrealized gain (losses) on instruments still held |
3
|
(360)
|
8
|
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
|
3
|
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
|
(3)
|
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
|
(3)
|
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 |
2,159
|
3,174
|
1,911
|
3,355
|
| Total realized and unrealized gains (losses) included in income |
0
|
0
|
0
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
8
|
3
|
149
|
3
|
| Movements purchases/Issuances |
1
|
1
|
171
|
3
|
| Movements Sales/ Settlements |
(25)
|
(370)
|
(88)
|
553
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
2,143
|
2,808
|
2,143
|
2,808
|
| Change in Unrealized gain (losses) on instruments still held |
3
|
(357)
|
8
|
0
|
| Trading loans, securities and other [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
269
|
19
|
92
|
38
|
| Total realized and unrealized gains (losses) included in income |
(7)
|
0
|
(124)
|
1
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
256
|
20
|
549
|
22
|
| Movements Sales/ Settlements |
(19)
|
(7)
|
(22)
|
29
|
| Transfer Into Level 3 |
1
|
2
|
5
|
2
|
| Transfers Out of Level 3 |
(1)
|
0
|
(1)
|
0
|
| Fair value ending balance |
499
|
34
|
499
|
34
|
| Change in Unrealized gain (losses) on instruments still held |
(1)
|
0
|
(4)
|
0
|
| 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 |
67
|
11
|
67
|
26
|
| Total realized and unrealized gains (losses) included in income |
0
|
0
|
(1)
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
0
|
| Movements Sales/ Settlements |
(19)
|
(7)
|
(22)
|
22
|
| Transfer Into Level 3 |
1
|
2
|
5
|
2
|
| Transfers Out of Level 3 |
(1)
|
0
|
(1)
|
0
|
| Fair value ending balance |
48
|
6
|
48
|
6
|
| Change in Unrealized gain (losses) on instruments still held |
(1)
|
0
|
(4)
|
0
|
| Trading loans, securities and other [member] | Equity securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
23
|
8
|
25
|
12
|
| Total realized and unrealized gains (losses) included in income |
2
|
0
|
0
|
1
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
20
|
0
|
22
|
| 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 |
25
|
28
|
25
|
28
|
| Change in Unrealized gain (losses) on instruments still held |
0
|
$ 0
|
0
|
$ 0
|
| Trading loans, securities and other [member] | Trading loans [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
179
|
|
0
|
|
| Total realized and unrealized gains (losses) included in income |
(9)
|
|
(123)
|
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
|
0
|
|
| Movements purchases/Issuances |
256
|
|
549
|
|
| Movements Sales/ Settlements |
0
|
|
0
|
|
| Transfer Into Level 3 |
0
|
|
0
|
|
| Transfers Out of Level 3 |
0
|
|
0
|
|
| Fair value ending balance |
$ 426
|
|
426
|
|
| Change in Unrealized gain (losses) on instruments still held |
|
|
$ 0
|
|