v3.25.4
Personnel expenses - Sensitivity analysis of essential assumptions (Details) - SEK (kr)
kr in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Discount rate      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Decrease in actuarial assumption (as a percent) (1.00%) (1.00%) (1.00%)
Increase in actuarial assumption (as a percent) 1.00% 1.00% 1.00%
Defined benefit obligation after reasonable decrease in actuarial assumption kr 204 kr 230 kr 235
Defined benefit obligation after reasonable increase in actuarial assumption 148 155 156
Service cost after reasonable decrease in actuarial assumption 4 4 4
Service cost after reasonable increase in actuarial assumption 3 2 2
Interest cost on defined benefit obligation after reasonable decrease in actuarial assumption 6 6 5
Interest cost on defined benefit obligation after reasonable increase in actuarial assumption 7 7 7
Expected lifetime      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Defined benefit obligation after reasonable decrease in actuarial assumption 167 180 182
Defined benefit obligation after reasonable increase in actuarial assumption 178 197 200
Service cost after reasonable decrease in actuarial assumption 3 3 3
Service cost after reasonable increase in actuarial assumption 3 3 3
Interest cost on defined benefit obligation after reasonable decrease in actuarial assumption 6 6 6
Interest cost on defined benefit obligation after reasonable increase in actuarial assumption kr 7 kr 7 kr 7
Increase in actuarial assumption (in years) 1 year 1 year 1 year
Decrease in actuarial assumption (in years) 1 year 1 year 1 year