Related party transactions - Summary of Other Transactions, Arrangements or Agreements Involving Joint Ventures and Associates (Detail) - Joint ventures and associates [member] - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Oct. 31, 2022 |
Oct. 31, 2021 |
|
| Disclosure of transactions between related parties [line items] | ||
| Commitments and other contingencies | $ 829 | $ 1,017 |
| Other fees received for services rendered | 50 | 48 |
| Other fees paid for services received | $ 107 | $ 108 |