Fair Value Measurements - Summary of Changes in Level 3 Instruments Carried at Fair Value (Details) - Level 3 - 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 [line items] |
|
|
|
|
| Liabilities at end of period |
$ 135
|
|
$ 135
|
|
| Other assets |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
1,505
|
$ 1,841
|
1,483
|
$ 1,717
|
| Change in fair value included in earnings |
(12)
|
(1)
|
3
|
(56)
|
| Change in fair value included in other comprehensive income |
0
|
0
|
(2)
|
0
|
| Purchases/Issuances |
19
|
7
|
46
|
201
|
| Sales |
0
|
(7)
|
(10)
|
(7)
|
| Maturities/Settlement |
(17)
|
(405)
|
(25)
|
(420)
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Assets at end of period |
1,495
|
1,435
|
1,495
|
1,435
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
(12)
|
(1)
|
3
|
(52)
|
| Derivative Assets |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
8
|
60
|
25
|
12
|
| Change in fair value included in earnings |
18
|
2
|
3
|
5
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
32
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
(42)
|
0
|
(42)
|
| Transfers into Level 3 |
3
|
4
|
4
|
17
|
| Transfers out of Level 3 |
(3)
|
0
|
(6)
|
0
|
| Assets at end of period |
26
|
24
|
26
|
24
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
18
|
2
|
3
|
5
|
| Foreign exchange contracts | Derivative Assets |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
0
|
42
|
2
|
10
|
| Change in fair value included in earnings |
19
|
0
|
17
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
32
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
(42)
|
0
|
(42)
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Assets at end of period |
19
|
0
|
19
|
0
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
19
|
0
|
17
|
0
|
| Commodity contracts | Derivative Assets |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
0
|
5
|
13
|
2
|
| Change in fair value included in earnings |
0
|
4
|
(13)
|
7
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Assets at end of period |
0
|
9
|
0
|
9
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
0
|
4
|
(13)
|
7
|
| Equity contracts | Derivative Assets |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
8
|
13
|
10
|
0
|
| Change in fair value included in earnings |
(1)
|
(2)
|
(1)
|
(2)
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
3
|
3
|
4
|
16
|
| Transfers out of Level 3 |
(3)
|
0
|
(6)
|
0
|
| Assets at end of period |
7
|
14
|
7
|
14
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
(1)
|
(2)
|
(1)
|
(2)
|
| Credit default swaps | Derivative Assets |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
0
|
0
|
0
|
0
|
| Change in fair value included in earnings |
0
|
0
|
0
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
1
|
0
|
1
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Assets at end of period |
0
|
1
|
0
|
1
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
0
|
0
|
0
|
0
|
| Other Liabilities |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Liabilities at beginning of period |
128
|
0
|
0
|
0
|
| Change in fair value included in earnings |
7
|
0
|
23
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
112
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Liabilities at end of period |
135
|
0
|
135
|
0
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
7
|
0
|
23
|
0
|
| Derivative Liabilities |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Liabilities at beginning of period |
27
|
3
|
5
|
7
|
| Change in fair value included in earnings |
(11)
|
0
|
16
|
(4)
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
(1)
|
0
|
(1)
|
| Transfers into Level 3 |
5
|
1
|
5
|
1
|
| Transfers out of Level 3 |
0
|
(2)
|
(5)
|
(2)
|
| Liabilities at end of period |
21
|
1
|
21
|
1
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
(11)
|
0
|
16
|
(4)
|
| Derivative Liabilities | Foreign exchange contracts |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Liabilities at beginning of period |
13
|
0
|
0
|
0
|
| Change in fair value included in earnings |
(5)
|
0
|
8
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Liabilities at end of period |
8
|
0
|
8
|
0
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
(5)
|
0
|
8
|
0
|
| Derivative Liabilities | Commodity contracts |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Liabilities at beginning of period |
14
|
0
|
0
|
4
|
| Change in fair value included in earnings |
(6)
|
0
|
8
|
(4)
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Liabilities at end of period |
8
|
0
|
8
|
0
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
(6)
|
0
|
8
|
(4)
|
| Derivative Liabilities | Equity contracts |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Liabilities at beginning of period |
0
|
2
|
5
|
2
|
| Change in fair value included in earnings |
0
|
0
|
0
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
5
|
1
|
5
|
1
|
| Transfers out of Level 3 |
0
|
(2)
|
(5)
|
(2)
|
| Liabilities at end of period |
5
|
1
|
5
|
1
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
0
|
0
|
0
|
0
|
| Derivative Liabilities | Credit default swaps |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Liabilities at beginning of period |
0
|
1
|
0
|
1
|
| Change in fair value included in earnings |
0
|
0
|
0
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
(1)
|
0
|
(1)
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Liabilities at end of period |
0
|
0
|
0
|
0
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
0
|
0
|
0
|
0
|
| Corporate equity |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at end of period |
6,007
|
|
6,007
|
|
| Trading Securities |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
0
|
6
|
0
|
4
|
| Change in fair value included in earnings |
0
|
0
|
0
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
5
|
0
|
7
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
(6)
|
0
|
(6)
|
| Assets at end of period |
0
|
5
|
0
|
5
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
0
|
0
|
0
|
0
|
| Trading Securities | NHA MBS, U.S. agency MBS and CMO |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
0
|
0
|
0
|
0
|
| Change in fair value included in earnings |
0
|
0
|
0
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
5
|
0
|
5
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Assets at end of period |
0
|
5
|
0
|
5
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
0
|
0
|
0
|
0
|
| Trading Securities | Corporate equity |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
0
|
6
|
0
|
4
|
| Change in fair value included in earnings |
0
|
0
|
0
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
0
|
0
|
0
|
2
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
(6)
|
0
|
(6)
|
| Assets at end of period |
0
|
0
|
0
|
0
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
0
|
0
|
0
|
0
|
| FVTPL Securities |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
5,618
|
5,235
|
5,824
|
4,934
|
| Change in fair value included in earnings |
(55)
|
(118)
|
(167)
|
(95)
|
| Change in fair value included in other comprehensive income |
(1)
|
(110)
|
(75)
|
(21)
|
| Purchases/Issuances |
258
|
343
|
534
|
616
|
| Sales |
(72)
|
(57)
|
(364)
|
(139)
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
73
|
0
|
73
|
0
|
| Transfers out of Level 3 |
0
|
0
|
(4)
|
(2)
|
| Assets at end of period |
5,821
|
5,293
|
5,821
|
5,293
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
6
|
(66)
|
(52)
|
17
|
| FVTPL Securities | Corporate equity |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
5,618
|
5,202
|
5,824
|
4,899
|
| Change in fair value included in earnings |
(55)
|
(120)
|
(167)
|
(96)
|
| Change in fair value included in other comprehensive income |
(1)
|
(110)
|
(75)
|
(21)
|
| Purchases/Issuances |
255
|
342
|
531
|
614
|
| Sales |
(72)
|
(57)
|
(364)
|
(139)
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
73
|
0
|
73
|
0
|
| Transfers out of Level 3 |
0
|
0
|
(4)
|
0
|
| Assets at end of period |
5,818
|
5,257
|
5,818
|
5,257
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
6
|
(68)
|
(52)
|
16
|
| FVTPL Securities | Corporate debt |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
0
|
33
|
0
|
35
|
| Change in fair value included in earnings |
0
|
2
|
0
|
1
|
| Change in fair value included in other comprehensive income |
0
|
0
|
0
|
0
|
| Purchases/Issuances |
3
|
1
|
3
|
2
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
(2)
|
| Assets at end of period |
3
|
36
|
3
|
36
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
0
|
2
|
0
|
1
|
| FVOCI securities |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
189
|
163
|
192
|
177
|
| Change in fair value included in earnings |
0
|
0
|
0
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
(4)
|
(15)
|
| Purchases/Issuances |
0
|
26
|
1
|
27
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Assets at end of period |
189
|
189
|
189
|
189
|
| FVOCI securities | Corporate equity |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
189
|
163
|
192
|
177
|
| Change in fair value included in earnings |
0
|
0
|
0
|
0
|
| Change in fair value included in other comprehensive income |
0
|
0
|
(4)
|
(15)
|
| Purchases/Issuances |
0
|
26
|
1
|
27
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
0
|
| Transfers into Level 3 |
0
|
0
|
0
|
0
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Assets at end of period |
189
|
189
|
189
|
189
|
| Loans: Business and government |
|
|
|
|
| Disclosure of fair value measurement of assets [line items] |
|
|
|
|
| Assets at beginning of period |
339
|
321
|
324
|
302
|
| Change in fair value included in earnings |
1
|
(11)
|
3
|
2
|
| Change in fair value included in other comprehensive income |
(26)
|
(7)
|
(36)
|
(1)
|
| Purchases/Issuances |
0
|
50
|
23
|
56
|
| Sales |
0
|
0
|
0
|
0
|
| Maturities/Settlement |
0
|
0
|
0
|
(6)
|
| Transfers into Level 3 |
0
|
29
|
0
|
29
|
| Transfers out of Level 3 |
0
|
0
|
0
|
0
|
| Assets at end of period |
314
|
382
|
314
|
382
|
| Change in unrealized gains (losses) recorded in income for instruments still held |
$ 1
|
$ (11)
|
$ 3
|
$ 2
|