v3.26.1
Impairments - Schedule of impairments & schedule of balances in loss allowance (Details) - SEK (kr)
kr in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Impairment details              
Established credit losses kr (2)   kr (100) kr (2) kr (100) kr (100)  
Reserves applied to cover established credit losses 2   93 2 93 94  
Recovered credit losses 0 kr 1 1 1 1 1  
Net credit losses kr 61 0 (71) kr 61 (38) kr (429)  
Loans and off balance              
Provision ratio 0.22%     0.22%   0.23%  
Gross carrying amount              
Loans and off balance              
Loans and off balance kr 355,539     kr 355,539   kr 355,038  
Gross carrying amount | Loans              
Loans and off balance              
Loans and off balance 264,153     264,153   263,517  
Gross carrying amount | Off-balance sheet              
Loans and off balance              
Loans and off balance 91,386     91,386   91,520  
Accumulated impairment              
Loans and off balance              
Loans and off balance (768)     (768)   (807) kr (526)
Accumulated impairment | Loans              
Loans and off balance              
Loans and off balance (768)     (768)   (805)  
Accumulated impairment | Off-balance sheet              
Loans and off balance              
Loans and off balance 0     0   (2)  
Stage 1              
Impairment details              
Net credit losses kr 5 10 (39) kr 15 (29) (19)  
Loans and off balance              
Provision ratio 0.02%     0.02%      
Stage 1 | Gross carrying amount              
Loans and off balance              
Loans and off balance kr 299,475     kr 299,475      
Stage 1 | Gross carrying amount | Loans              
Loans and off balance              
Loans and off balance 222,081     222,081      
Stage 1 | Gross carrying amount | Off-balance sheet              
Loans and off balance              
Loans and off balance 77,393     77,393      
Stage 1 | Accumulated impairment              
Loans and off balance              
Loans and off balance (55)     (55)   (69)  
Stage 1 | Accumulated impairment | Loans              
Loans and off balance              
Loans and off balance (55)     (55)      
Stage 1 | Accumulated impairment | Off-balance sheet              
Loans and off balance              
Loans and off balance 0     0      
Lifetime expected credit losses | Stage 2              
Impairment details              
Net credit losses kr 32 6 (12) kr 38 (5) (293)  
Loans and off balance              
Provision ratio 0.69%     0.69%      
Lifetime expected credit losses | Stage 2 | Gross carrying amount              
Loans and off balance              
Loans and off balance kr 50,366     kr 50,366      
Lifetime expected credit losses | Stage 2 | Gross carrying amount | Loans              
Loans and off balance              
Loans and off balance 36,373     36,373      
Lifetime expected credit losses | Stage 2 | Gross carrying amount | Off-balance sheet              
Loans and off balance              
Loans and off balance 13,993     13,993      
Lifetime expected credit losses | Stage 2 | Accumulated impairment              
Loans and off balance              
Loans and off balance (347)     (347)   (378)  
Lifetime expected credit losses | Stage 2 | Accumulated impairment | Loans              
Loans and off balance              
Loans and off balance (347)     (347)      
Lifetime expected credit losses | Stage 2 | Accumulated impairment | Off-balance sheet              
Loans and off balance              
Loans and off balance 0     0      
Lifetime expected credit losses | Stage 3              
Impairment details              
Net credit losses kr 24 kr (17) kr (14) kr 7 kr 2 (112)  
Loans and off balance              
Provision ratio 6.41%     6.41%      
Lifetime expected credit losses | Stage 3 | Gross carrying amount              
Loans and off balance              
Loans and off balance kr 5,698     kr 5,698      
Lifetime expected credit losses | Stage 3 | Gross carrying amount | Loans              
Loans and off balance              
Loans and off balance 5,698     5,698      
Lifetime expected credit losses | Stage 3 | Gross carrying amount | Off-balance sheet              
Loans and off balance              
Loans and off balance 0     0      
Lifetime expected credit losses | Stage 3 | Accumulated impairment              
Loans and off balance              
Loans and off balance (365)     (365)   kr (359)  
Lifetime expected credit losses | Stage 3 | Accumulated impairment | Loans              
Loans and off balance              
Loans and off balance kr (365)     kr (365)