Personnel expenses - Pensions - Narrative (Details) - SEK (kr) kr in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Classes of employee benefits expense [abstract] | |||
| Pension expense | kr 3 | kr 4 | kr 4 |
| Expected weighted average remaining service time for active employees | 9 years 6 months 3 days | 9 years 11 months 26 days | |
| Expected weighted average duration for the present value | 16 years 8 months 26 days | 14 years 11 months 12 days | |
| Average salary for active employees | kr 1 | kr 1 | |
| Percentage of employees early retirement | 20.00% | ||
| Retirement age for employees born on or before 1956 | 61 years | ||
| Retirement age for employees born on or after 1967 | 65 years | ||