Employee compensation and benefits - Mortality tables and average life expectancy at age 60 for the principal plan (Details) - Pension Plan - Principal plan |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Aged 60, Male | ||
| Disclosure of defined benefit plans [line items] | ||
| Life expectancy at age 60 | 26 years 4 months 24 days | 26 years 1 month 6 days |
| Aged 40, Male | ||
| Disclosure of defined benefit plans [line items] | ||
| Life expectancy at age 60 | 28 years | 27 years 8 months 12 days |
| Aged 60, Female | ||
| Disclosure of defined benefit plans [line items] | ||
| Life expectancy at age 60 | 28 years 4 months 24 days | 28 years 3 months 18 days |
| Aged 40, Female | ||
| Disclosure of defined benefit plans [line items] | ||
| Life expectancy at age 60 | 30 years | 29 years 10 months 24 days |