v3.25.4
Financial assets and liabilities at fair value - Narrative (Details)
12 Months Ended
Dec. 31, 2025
SEK (kr)
Dec. 31, 2024
SEK (kr)
Disclosure of detailed information about financial instruments [line items]    
Transfers into Level 3 of fair value hierarchy, assets kr 0 kr 0
Transfers into Level 3 of fair value hierarchy, liabilities kr 0 kr 0
Sensitivity, correlations maximum positive relationship 1  
Sensitivity, correlations maximum negative relationship (1)  
Correlation input    
Disclosure of detailed information about financial instruments [line items]    
Sensitivity, input appreciation, assets 0.12  
Sensitivity, input depreciation, assets 0.12  
Sensitivity, input appreciation, liabilities 0.12  
Sensitivity, input depreciation, liabilities 0.12  
Credit spread, measurement input    
Disclosure of detailed information about financial instruments [line items]    
Sensitivity, input appreciation, assets 0.10%  
Sensitivity, input depreciation, assets 0.10%  
Sensitivity, input appreciation, liabilities 0.10%  
Sensitivity, input depreciation, liabilities 0.10%