Interest income and expense - Summary of Consolidated Interest Income and Expense for Both Product and Accounting Categories (Detail) - CAD ($) $ in Millions |
3 Months Ended | ||||
|---|---|---|---|---|---|
Jan. 31, 2023 |
Oct. 31, 2022 |
Jan. 31, 2022 |
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| Analysis Of Income And Expense [line items] | |||||
| Interest income | [1] | $ 10,260 | $ 8,192 | $ 3,941 | |
| Interest expense | 7,055 | 5,007 | 809 | ||
| Amortised cost [member] | |||||
| Analysis Of Income And Expense [line items] | |||||
| Interest income | 9,048 | 7,169 | 3,376 | ||
| Interest expense | 6,736 | 4,724 | 703 | ||
| Debt securities measured at fair value through other comprehensive income [member] | |||||
| Analysis Of Income And Expense [line items] | |||||
| Interest income | 599 | 423 | 84 | ||
| Other [member] | |||||
| Analysis Of Income And Expense [line items] | |||||
| Interest income | 613 | 600 | 481 | ||
| Interest expense | $ 319 | $ 283 | $ 106 | ||
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