v3.25.4
Risk information - Credit exposure (Details) - SEK (kr)
kr in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of credit risk exposure [line items]    
Financial assets kr 341,277 kr 359,484
Committed undisbursed loans 81,624 56,887
AAA    
Disclosure of credit risk exposure [line items]    
Financial assets 144,369 160,578
Committed undisbursed loans 76,607 49,762
AA+ to A-    
Disclosure of credit risk exposure [line items]    
Financial assets 80,079 85,056
Committed undisbursed loans 678 675
BBB+ to BBB-    
Disclosure of credit risk exposure [line items]    
Financial assets 79,903 75,529
Committed undisbursed loans 1,664 3,236
BB+ to B-    
Disclosure of credit risk exposure [line items]    
Financial assets 34,445 37,402
Committed undisbursed loans 2,264 3,214
CCC to D    
Disclosure of credit risk exposure [line items]    
Financial assets 2,481 919
Committed undisbursed loans 410  
Cash and cash equivalents    
Disclosure of credit risk exposure [line items]    
Financial assets 7,259 5,219
Cash and cash equivalents | AAA    
Disclosure of credit risk exposure [line items]    
Financial assets 1,000 1,000
Cash and cash equivalents | AA+ to A-    
Disclosure of credit risk exposure [line items]    
Financial assets 6,258 4,217
Cash and cash equivalents | BB+ to B-    
Disclosure of credit risk exposure [line items]    
Financial assets 1 2
Treasuries/government bonds    
Disclosure of credit risk exposure [line items]    
Financial assets 13,419 4,150
Treasuries/government bonds | AAA    
Disclosure of credit risk exposure [line items]    
Financial assets 11,585 1,650
Treasuries/government bonds | AA+ to A-    
Disclosure of credit risk exposure [line items]    
Financial assets 1,834 2,500
Other interest-bearing securities except loans    
Disclosure of credit risk exposure [line items]    
Financial assets 43,237 52,843
Other interest-bearing securities except loans | AAA    
Disclosure of credit risk exposure [line items]    
Financial assets 22,989 31,758
Other interest-bearing securities except loans | AA+ to A-    
Disclosure of credit risk exposure [line items]    
Financial assets 19,573 20,527
Other interest-bearing securities except loans | BBB+ to BBB-    
Disclosure of credit risk exposure [line items]    
Financial assets 676 558
Loans in the form of interest-bearing securities    
Disclosure of credit risk exposure [line items]    
Financial assets 47,485 48,726
Loans in the form of interest-bearing securities | AAA    
Disclosure of credit risk exposure [line items]    
Financial assets   600
Loans in the form of interest-bearing securities | AA+ to A-    
Disclosure of credit risk exposure [line items]    
Financial assets 16,715 18,329
Loans in the form of interest-bearing securities | BBB+ to BBB-    
Disclosure of credit risk exposure [line items]    
Financial assets 30,770 28,997
Loans in the form of interest-bearing securities | BB+ to B-    
Disclosure of credit risk exposure [line items]    
Financial assets   800
Loans to credit institutions    
Disclosure of credit risk exposure [line items]    
Financial assets 22,939 13,529
Loans to credit institutions | AAA    
Disclosure of credit risk exposure [line items]    
Financial assets 11,169 4,730
Loans to credit institutions | AA+ to A-    
Disclosure of credit risk exposure [line items]    
Financial assets 10,433 7,566
Loans to credit institutions | BBB+ to BBB-    
Disclosure of credit risk exposure [line items]    
Financial assets 1,143 1,219
Loans to credit institutions | BB+ to B-    
Disclosure of credit risk exposure [line items]    
Financial assets 195 14
Loans to the public    
Disclosure of credit risk exposure [line items]    
Financial assets 200,216 224,354
Loans to the public | AAA    
Disclosure of credit risk exposure [line items]    
Financial assets 97,626 120,840
Loans to the public | AA+ to A-    
Disclosure of credit risk exposure [line items]    
Financial assets 18,567 21,292
Loans to the public | BBB+ to BBB-    
Disclosure of credit risk exposure [line items]    
Financial assets 47,313 44,737
Loans to the public | BB+ to B-    
Disclosure of credit risk exposure [line items]    
Financial assets 34,229 36,586
Loans to the public | CCC to D    
Disclosure of credit risk exposure [line items]    
Financial assets 2,481 899
Derivatives    
Disclosure of credit risk exposure [line items]    
Financial assets 6,721 10,643
Derivatives | AA+ to A-    
Disclosure of credit risk exposure [line items]    
Financial assets 6,700 10,625
Derivatives | BBB+ to BBB-    
Disclosure of credit risk exposure [line items]    
Financial assets 0 18
Derivatives | BB+ to B-    
Disclosure of credit risk exposure [line items]    
Financial assets kr 20  
Shares    
Disclosure of credit risk exposure [line items]    
Financial assets   20
Shares | CCC to D    
Disclosure of credit risk exposure [line items]    
Financial assets   kr 20