v3.26.1
Impairments - Schedule of reconciliation of changes in loss allowances by stages (Details) - Accumulated impairment - SEK (kr)
kr in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Change in loss allowance    
Opening balance January 1 kr (807) kr (526)
Increases due to origination and acquisition (74) (343)
Net remeasurement of loss allowance (62) (65)
Transfer to stage 1 5 0
Transfer to stage 2 (2) (29)
Transfer to stage 3 (14) (75)
Decreases due to derecognition 206 88
Decreases in allowance account due to write-offs 2 94
Exchange-rate differences (23) 50
Closing balance (768) (807)
Stage 1    
Change in loss allowance    
Opening balance January 1 (69)  
Increases due to origination and acquisition (4)  
Net remeasurement of loss allowance 13  
Transfer to stage 1 0  
Transfer to stage 2 2  
Transfer to stage 3 0  
Decreases due to derecognition 6  
Exchange-rate differences (1)  
Closing balance (55) (69)
Lifetime expected credit losses | Stage 2    
Change in loss allowance    
Opening balance January 1 (378)  
Increases due to origination and acquisition (70)  
Net remeasurement of loss allowance (68)  
Transfer to stage 1 5  
Transfer to stage 2 (4)  
Transfer to stage 3 2  
Decreases due to derecognition 171  
Exchange-rate differences (7)  
Closing balance (347) (378)
Lifetime expected credit losses | Stage 3    
Change in loss allowance    
Opening balance January 1 (359)  
Net remeasurement of loss allowance (7)  
Transfer to stage 3 (16)  
Decreases due to derecognition 29  
Decreases in allowance account due to write-offs 2  
Exchange-rate differences (14)  
Closing balance kr (365) kr (359)