Segregated funds - Summary of Segregated Funds Net Assets (Detail) - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Oct. 31, 2022 |
Oct. 31, 2021 |
|
| Disclosure of changes in segregated fund net assets [Line Items] | ||
| Net assets at beginning of period | $ 2,666 | |
| Additions (deductions): | ||
| Net assets at end of period | 2,638 | $ 2,666 |
| Level 1 [member] | Segregated funds net assets [member] | ||
| Disclosure of changes in segregated fund net assets [Line Items] | ||
| Net assets at beginning of period | 2,666 | 1,922 |
| Additions (deductions): | ||
| Deposits from policyholders | 859 | 975 |
| Net realized and unrealized gains (losses) | (301) | 381 |
| Interest and dividends | 56 | 51 |
| Payment to policyholders | (573) | (604) |
| Management and administrative fees | (69) | (59) |
| Net assets at end of period | $ 2,638 | $ 2,666 |