| Group | Financial instruments at fair value through profit or loss | Financial instruments at fair value through other comprehensive income  | 
Financial instruments measured at amortised cost  | 
Total | ||
| 31 Dec 2019 (NOK million) | Designated as such upon initial recognition | Mandatorily | Held for trading | |||
| Assets | ||||||
| Cash and receivables from central banks | - | - | - | - | 761 | 761 | 
| Deposits with and loans to credit institutions | - | - | - | - | 2.110 | 2.110 | 
| Loans to and receivables from customers | 4.679 | - | - | 71.336 | 49.264 | 125.279 | 
| Shares, units and other equity interests | - | 447 | 2.506 | - | - | 2.953 | 
| Fixed-income CDs and bonds | - | 23.115 | - | - | - | 23.115 | 
| Derivatives | - | - | 2.972 | - | - | 2.972 | 
| Earned income not yet received | - | - | - | - | 132 | 132 | 
| Accounts receivable, securities | - | - | - | - | 292 | 292 | 
| Total financial assets | 4.679 | 23.562 | 5.477 | 71.336 | 52.560 | 157.614 | 
| Liabilities | ||||||
| Deposits from credit institutions | - | - | - | - | 8.853 | 8.853 | 
| Deposits from and debt to customers | - | - | - | - | 85.917 | 85.917 | 
| Debt created by issue of securities | - | - | - | - | 43.014 | 43.014 | 
| Derivatives | - | - | 3.528 | - | - | 3.528 | 
| Subordinated loan capital | - | - | - | - | 2.090 | 2.090 | 
| Equity instruments | - | - | 244 | - | - | 244 | 
| Lease liabilities | - | - | - | - | 505 | 505 | 
| Debt from securities | - | - | - | - | 197 | 197 | 
| Total financial liabilities | - | - | 3.772 | - | 140.576 | 144.349 | 
| Group | Financial instruments at fair  value through profit or loss  | 
 Financial instruments at fair value through other comprehensive income  | 
 Financial instruments measured at amortised cost  | 
Total | ||
| 31 Dec 2018 (NOK million) | Designated as such upon initial recognition  | 
Mandatorily | Held for trading | |||
| Assets | ||||||
| Cash and receivables from central banks | - | - | - | - | 883 | 883 | 
| Deposits with and loans to credit institutions | - | - | - | - | 5,074 | 5,074 | 
| Loans to and receivables from customers | 4,467 | - | - | 61,295 | 53,967 | 119,728 | 
| Shares, units and other equity interests | - | 678 | 1,195 | - | - | 1,873 | 
| Fixed-income CDs and bonds | - | 20,348 | - | - | - | 20,348 | 
| Derivatives | - | - | 4,119 | - | - | 4,119 | 
| Earned income, not yet received | - | - | - | - | 86 | 86 | 
| Account receivable, securities | - | - | - | - | 277 | 277 | 
| Total financial assets | 4,467 | 21,026 | 5,314 | 61,295 | 60,286 | 152,388 | 
| Liabilities | ||||||
| Deposits from credit institutions | - | - | - | - | 9,214 | 9,214 | 
| Deposits from and debt to customers | - | - | - | - | 80,615 | 80,615 | 
| Debt created by issue of securities | - | - | - | - | 44,269 | 44,269 | 
| Derivatives | - | - | 2,982 | - | - | 2,982 | 
| Subordinated loan capital | - | - | - | - | 2,268 | 2,268 | 
| Equity instruments | - | - | 31 | - | - | 31 | 
| Account payable, securities | - | - | - | - | 809 | 809 | 
| Total financial liabilities | - | - | 3,013 | - | 137,175 | 140,188 |