v3.25.4
Impairments - Reconciliations (Details) - SEK (kr)
kr in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Changes in loss allowance    
Amortized cost before modification kr 0 kr 1,040
Net modification gain/loss 0 95
Gross carrying amount    
Changes in loss allowance    
Opening balance 350,246 346,506
Increase due to origination and acquisition 140,411 89,258
Transfer to stage 1 (8) (642)
Transfer to stage 2 (4,737) (189)
Transfer to stage 3 (99) (449)
Decrease due to derecognition (130,775) (84,238)
Closing balance 355,038 350,246
Gross carrying amount | Stage 1    
Changes in loss allowance    
Opening balance 289,986 278,263
Increase due to origination and acquisition 113,205 84,871
Transfer to stage 1 1,108 3,296
Transfer to stage 2 (8,711) (423)
Transfer to stage 3 (566) (90)
Decrease due to derecognition (96,749) (75,931)
Closing balance 298,275 289,986
Gross carrying amount | Lifetime expected credit losses | Stage 2    
Changes in loss allowance    
Opening balance 48,382 54,290
Increase due to origination and acquisition 27,153 4,042
Transfer to stage 1 (1,105) (3,938)
Transfer to stage 2 4,419 328
Transfer to stage 3 0 (522)
Decrease due to derecognition (28,045) (5,818)
Closing balance 50,803 48,382
Gross carrying amount | Lifetime expected credit losses | Stage 3    
Changes in loss allowance    
Opening balance 11,878 13,953
Increase due to origination and acquisition 53 345
Transfer to stage 1 (11) 0
Transfer to stage 2 (444) (94)
Transfer to stage 3 467 163
Decrease due to derecognition (5,982) (2,489)
Closing balance 5,960 11,878
Accumulated impairment    
Changes in loss allowance    
Opening balance (526) (795)
Increase due to origination and acquisition (343) (20)
Net remeasurement of loss allowance (65) 60
Transfer to stage 1 0 3
Transfer to stage 2 (29) (189)
Transfer to stage 3 (75) (95)
Decrease due to derecognition 88 155
Decrease in allowance account due to write-offs 94 393
Exchange-rate differences 50 (38)
Closing balance (807) (526)
Accumulated impairment | Stage 1    
Changes in loss allowance    
Opening balance (54) (167)
Increase due to origination and acquisition (34) (20)
Net remeasurement of loss allowance 0 99
Transfer to stage 1 0 0
Transfer to stage 2 2 1
Transfer to stage 3 0 0
Decrease due to derecognition 13 35
Exchange-rate differences 3 (2)
Closing balance (69) (54)
Accumulated impairment | Lifetime expected credit losses | Stage 2    
Changes in loss allowance    
Opening balance (86) (61)
Increase due to origination and acquisition (280) 0
Net remeasurement of loss allowance 16 128
Transfer to stage 1 0 3
Transfer to stage 2 (31) (210)
Transfer to stage 3 0 2
Decrease due to derecognition 1 56
Exchange-rate differences 1 (4)
Closing balance (378) (86)
Accumulated impairment | Lifetime expected credit losses | Stage 3    
Changes in loss allowance    
Opening balance (386) (567)
Increase due to origination and acquisition (29) 0
Net remeasurement of loss allowance (81) (167)
Transfer to stage 1 0 0
Transfer to stage 2 0 20
Transfer to stage 3 (76) (97)
Decrease due to derecognition 73 64
Decrease in allowance account due to write-offs 94 393
Exchange-rate differences 45 (32)
Closing balance kr (359) kr (386)