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, 2024 |
Apr. 30, 2023 |
Apr. 30, 2024 |
Apr. 30, 2023 |
| Derivative Financial Liabilities [Member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
$ (176)
|
$ (208)
|
$ (154)
|
$ (184)
|
| Total realized and unrealized gains (losses) included in income |
(28)
|
18
|
(45)
|
49
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
26
|
0
|
26
|
| Movements Sales/Settlements |
37
|
(26)
|
30
|
(59)
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
(6)
|
0
|
(7)
|
(2)
|
| Transfers Out of Level 3 |
1
|
(7)
|
4
|
(27)
|
| Fair value ending balance |
(172)
|
(197)
|
(172)
|
(197)
|
| Change in Unrealized gain (losses) on instruments still held |
1
|
20
|
(31)
|
7
|
| Derivative Financial Liabilities [Member] | Interest Rate Contracts [Member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(137)
|
(164)
|
(126)
|
(156)
|
| Total realized and unrealized gains (losses) included in income |
(18)
|
(6)
|
(41)
|
(30)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
0
|
| Movements Sales/Settlements |
7
|
1
|
19
|
17
|
| 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 |
(148)
|
(169)
|
(148)
|
(169)
|
| Change in Unrealized gain (losses) on instruments still held |
(10)
|
5
|
(23)
|
(5)
|
| Derivative Financial Liabilities [Member] | Foreign Exchange Contracts [Member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(1)
|
2
|
(6)
|
4
|
| Total realized and unrealized gains (losses) included in income |
(1)
|
(1)
|
1
|
(4)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
0
|
| Movements Sales/Settlements |
1
|
0
|
1
|
0
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
(6)
|
0
|
(6)
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
3
|
1
|
| Fair value ending balance |
(7)
|
1
|
(7)
|
1
|
| Change in Unrealized gain (losses) on instruments still held |
(1)
|
0
|
(2)
|
(1)
|
| Derivative Financial Liabilities [Member] | Equity Contracts [Member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(28)
|
(51)
|
(21)
|
(59)
|
| Total realized and unrealized gains (losses) included in income |
5
|
14
|
(1)
|
43
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
26
|
0
|
26
|
| Movements Sales/Settlements |
(1)
|
(9)
|
(1)
|
(7)
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
0
|
(1)
|
(2)
|
| Transfers Out of Level 3 |
1
|
(7)
|
1
|
(28)
|
| Fair value ending balance |
(23)
|
(27)
|
(23)
|
(27)
|
| Change in Unrealized gain (losses) on instruments still held |
4
|
16
|
(1)
|
17
|
| Derivative Financial Liabilities [Member] | Commodity contracts [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(10)
|
5
|
(1)
|
27
|
| Total realized and unrealized gains (losses) included in income |
(14)
|
11
|
(4)
|
40
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
0
|
0
|
0
|
0
|
| Movements Sales/Settlements |
30
|
(18)
|
11
|
(69)
|
| 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 |
6
|
(2)
|
6
|
(2)
|
| Change in Unrealized gain (losses) on instruments still held |
8
|
(1)
|
(5)
|
(4)
|
| 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 |
(24)
|
(22)
|
(22)
|
(44)
|
| Total realized and unrealized gains (losses) included in income |
(37)
|
20
|
1
|
70
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
(79)
|
(127)
|
(133)
|
(187)
|
| Movements Sales/Settlements |
66
|
80
|
80
|
112
|
| 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 |
(74)
|
(49)
|
(74)
|
(49)
|
| Change in Unrealized gain (losses) on instruments still held |
(37)
|
(21)
|
0
|
72
|
| Trading deposits [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
(1,039)
|
(486)
|
(985)
|
(416)
|
| Total realized and unrealized gains (losses) included in income |
34
|
(17)
|
10
|
(29)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
(18)
|
(89)
|
(74)
|
(148)
|
| Movements Sales/Settlements |
97
|
4
|
118
|
8
|
| Transfers into Level 3 of fair value hierarchy, liabilities |
0
|
(6)
|
0
|
(9)
|
| Transfers Out of Level 3 |
16
|
2
|
21
|
2
|
| Fair value ending balance |
(910)
|
(592)
|
(910)
|
(592)
|
| Change in Unrealized gain (losses) on instruments still held |
44
|
(14)
|
2
|
(24)
|
| 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 |
1,079
|
927
|
980
|
845
|
| Total realized and unrealized gains (losses) included in income |
49
|
40
|
62
|
83
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
33
|
79
|
124
|
121
|
| Movements Sales/ Settlements |
(10)
|
(45)
|
(15)
|
(48)
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
(1)
|
0
|
(1)
|
0
|
| Fair value ending balance |
1,150
|
1,001
|
1,150
|
1,001
|
| Change in Unrealized gain (losses) on instruments still held |
45
|
21
|
62
|
56
|
| 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 |
1,079
|
927
|
980
|
845
|
| Total realized and unrealized gains (losses) included in income |
49
|
40
|
62
|
83
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
33
|
79
|
124
|
121
|
| Movements Sales/ Settlements |
(10)
|
(45)
|
(15)
|
(48)
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
(1)
|
0
|
(1)
|
0
|
| Fair value ending balance |
1,150
|
1,001
|
1,150
|
1,001
|
| Change in Unrealized gain (losses) on instruments still held |
45
|
21
|
62
|
56
|
| Financial assets at fair value through other comprehensive income [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
2,168
|
3,303
|
2,404
|
2,537
|
| Total realized and unrealized gains (losses) included in income |
0
|
0
|
0
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
(3)
|
(204)
|
(16)
|
(219)
|
| Movements purchases/Issuances |
122
|
1,290
|
131
|
2,114
|
| Movements Sales/ Settlements |
34
|
(643)
|
(198)
|
(686)
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
2,321
|
3,746
|
2,321
|
3,746
|
| Change in Unrealized gain (losses) on instruments still held |
(10)
|
(183)
|
(11)
|
(205)
|
| Financial assets at fair value through other comprehensive income [member] | Other debt securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
26
|
63
|
27
|
60
|
| Total realized and unrealized gains (losses) included in income |
0
|
0
|
0
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
(1)
|
(15)
|
(4)
|
(8)
|
| Movements purchases/Issuances |
0
|
21
|
3
|
21
|
| Movements Sales/ Settlements |
(11)
|
(8)
|
(12)
|
(12)
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
14
|
61
|
14
|
61
|
| Change in Unrealized gain (losses) on instruments still held |
3
|
0
|
0
|
0
|
| Financial assets at fair value through other comprehensive income [member] | Equity securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
2,142
|
3,240
|
2,377
|
2,477
|
| Total realized and unrealized gains (losses) included in income |
0
|
0
|
0
|
0
|
| Total realized and unrealized gains (losses) included in OCI |
(2)
|
(189)
|
(12)
|
(211)
|
| Movements purchases/Issuances |
122
|
1,269
|
128
|
2,093
|
| Movements Sales/ Settlements |
45
|
(635)
|
(186)
|
(674)
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
2,307
|
3,685
|
2,307
|
3,685
|
| Change in Unrealized gain (losses) on instruments still held |
(13)
|
(183)
|
(11)
|
(205)
|
| Trading Loans Securities And Other [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
102
|
85
|
142
|
49
|
| Total realized and unrealized gains (losses) included in income |
(2)
|
(7)
|
0
|
2
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
20
|
48
|
92
|
62
|
| Movements Sales/ Settlements |
(38)
|
(49)
|
(154)
|
(64)
|
| Transfer Into Level 3 |
5
|
0
|
7
|
35
|
| Transfers Out of Level 3 |
(49)
|
(25)
|
(49)
|
(32)
|
| Fair value ending balance |
38
|
52
|
38
|
52
|
| Change in Unrealized gain (losses) on instruments still held |
(2)
|
(29)
|
(2)
|
(25)
|
| 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 |
61
|
85
|
65
|
49
|
| Total realized and unrealized gains (losses) included in income |
(2)
|
(3)
|
1
|
6
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
18
|
9
|
90
|
23
|
| Movements Sales/ Settlements |
(4)
|
(44)
|
(85)
|
(59)
|
| Transfer Into Level 3 |
5
|
0
|
7
|
35
|
| Transfers Out of Level 3 |
(49)
|
(25)
|
(49)
|
(32)
|
| Fair value ending balance |
29
|
22
|
29
|
22
|
| Change in Unrealized gain (losses) on instruments still held |
(1)
|
(27)
|
(2)
|
(23)
|
| Trading Loans Securities And Other [member] | Equity securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
7
|
0
|
10
|
0
|
| Total realized and unrealized gains (losses) included in income |
0
|
(4)
|
(1)
|
(4)
|
| Total realized and unrealized gains (losses) included in OCI |
0
|
0
|
0
|
0
|
| Movements purchases/Issuances |
2
|
39
|
2
|
39
|
| Movements Sales/ Settlements |
0
|
(5)
|
(2)
|
(5)
|
| Transfer Into Level 3 |
0
|
0
|
0
|
0
|
| Transfers Out of Level 3 |
0
|
0
|
0
|
0
|
| Fair value ending balance |
9
|
30
|
9
|
30
|
| Change in Unrealized gain (losses) on instruments still held |
(1)
|
(2)
|
0
|
(2)
|
| Trading Loans Securities And Other [member] | Government and government-related securities [member] |
|
|
|
|
| Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items] |
|
|
|
|
| Fair value beginning balance |
34
|
0
|
67
|
0
|
| 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 |
(34)
|
0
|
(67)
|
0
|
| 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
|