v3.25.2
Impairments - Loss Allowance (Details)
kr in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2025
SEK (kr)
item
Dec. 31, 2024
SEK (kr)
Increase (decrease) in loss allowance    
Number of scenarios prepared for each PD curve | item 3  
Minimum    
Increase (decrease) in loss allowance    
Business cycle parameters for base scenario for PD segments (0.5)  
Weight of base scenario 60.00%  
Weight of downturn scenario 20.00%  
Weight of upturn scenario 0.00%  
Maximum    
Increase (decrease) in loss allowance    
Business cycle parameters for base scenario for PD segments 1.5  
Weight of base scenario 70.00%  
Weight of downturn scenario 30.00%  
Weight of upturn scenario 20.00%  
Accumulated impairment    
Increase (decrease) in loss allowance    
Loans and off balance at beginning of period kr (526) kr (795)
Increases due to origination and acquisition (21) (20)
Net remeasurement of loss allowance (77) 60
Transfer to stage 1 (1) 3
Transfer to stage 2 (6) (189)
Transfer to stage 3   (95)
Decreases due to derecognition 73 155
Decrease in allowance account due to write-offs 93 393
Exchange-rate differences 40 (38)
Loans and off balance at end of period (425) (526)
12-month expected credit losses | Accumulated impairment    
Increase (decrease) in loss allowance    
Loans and off balance at beginning of period (54)  
Increases due to origination and acquisition (21)  
Net remeasurement of loss allowance (15)  
Transfer to stage 1 (1)  
Transfer to stage 2 1  
Decreases due to derecognition 7  
Exchange-rate differences 3  
Loans and off balance at end of period (80) (54)
Lifetime expected credit losses | Financial instruments not credit-impaired | Accumulated impairment    
Increase (decrease) in loss allowance    
Loans and off balance at beginning of period (86)  
Net remeasurement of loss allowance 2  
Transfer to stage 1 0  
Transfer to stage 2 (7)  
Decreases due to derecognition 0  
Exchange-rate differences 0  
Loans and off balance at end of period (91) (86)
Lifetime expected credit losses | Financial instruments credit-impaired | Accumulated impairment    
Increase (decrease) in loss allowance    
Loans and off balance at beginning of period (386)  
Net remeasurement of loss allowance (64)  
Transfer to stage 2 0  
Decreases due to derecognition 66  
Decrease in allowance account due to write-offs 93  
Exchange-rate differences 37  
Loans and off balance at end of period kr (254) kr (386)