v3.26.1
Financial assets and liabilities at fair value - Financial assets and liabilities at fair value (Details) - SEK (kr)
kr in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets kr 356,010 kr 341,277
Book value of financial liabilities 321,435 313,620
Fair value of financial assets 358,433 343,254
Fair value of financial liabilities 322,449 314,304
Surplus value (+) /Deficit value (-), financial assets 2,423 1,977
Surplus value (+) /Deficit value (-) financial liabilities 1,014 684
Borrowing from credit institutions    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial liabilities 5,252 4,410
Fair value of financial liabilities 5,252 4,410
Debt securities issued    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial liabilities 312,367 300,222
Fair value of financial liabilities 313,381 300,906
Surplus value (+) /Deficit value (-) financial liabilities 1,014 684
Derivatives    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial liabilities 3,816 8,988
Fair value of financial liabilities 3,816 8,988
Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 15,188 7,259
Fair value of financial assets 15,188 7,259
Treasuries/governments bonds    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 12,047 13,419
Fair value of financial assets 12,047 13,419
Other interest-bearing securities except loans    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 54,268 43,237
Fair value of financial assets 54,268 43,237
Loans in the form of interest-bearing securities    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 43,778 47,485
Fair value of financial assets 45,026 48,748
Surplus value (+) /Deficit value (-), financial assets 1,248 1,263
Loans to credit institutions    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 20,008 22,939
Fair value of financial assets 20,493 23,304
Surplus value (+) /Deficit value (-), financial assets 486 365
Loans to the public    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 203,513 200,216
Fair value of financial assets 204,202 200,566
Surplus value (+) /Deficit value (-), financial assets 689 350
Derivatives    
Disclosure of detailed information about financial instruments [line items]    
Book value of financial assets 7,208 6,721
Fair value of financial assets kr 7,208 kr 6,721