v3.25.4
Financial assets and liabilities at fair value - Financial assets and liabilities at fair value (Details) - SEK (kr)
kr in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets kr 341,277 kr 359,484
Book value of financial liabilities 313,620 330,222
Fair value of financial assets 343,254 360,634
Fair value of financial liabilities 314,304 330,209
Surplus value (+) /Deficit value (-), financial assets 1,977 1,150
Surplus value (+) /Deficit value (-) financial liabilities 684 (13)
Borrowing from credit institutions    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial liabilities 4,410 8,607
Fair value of financial liabilities 4,410 8,607
Debt securities issued    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial liabilities 300,222 316,388
Fair value of financial liabilities 300,906 316,375
Surplus value (+) /Deficit value (-) financial liabilities 684 (13)
Derivatives    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial liabilities 8,988 5,227
Fair value of financial liabilities 8,988 5,227
Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 7,259 5,219
Fair value of financial assets 7,259 5,219
Treasuries/government bonds    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 13,419 4,150
Fair value of financial assets 13,419 4,150
Other interest-bearing securities except loans    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 43,237 52,843
Fair value of financial assets 43,237 52,843
Loans in the form of interest-bearing securities    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 47,485 48,726
Fair value of financial assets 48,748 49,951
Surplus value (+) /Deficit value (-), financial assets 1,263 1,225
Loans to credit institutions    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 22,939 13,529
Fair value of financial assets 23,304 13,863
Surplus value (+) /Deficit value (-), financial assets 365 334
Loans to the public    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 200,216 224,354
Fair value of financial assets 200,566 223,945
Surplus value (+) /Deficit value (-), financial assets 350 (409)
Derivatives    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 6,721 10,643
Fair value of financial assets kr 6,721 10,643
Shares    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets   20
Fair value of financial assets   kr 20