Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||
| Statement of changes in equity [line items] | |||||
| Increase (decrease) through exercise of options, equity | — | — | — |
1,000,000
ISK
|
1,000,000
ISK
|
| Purchase of treasury shares |
58,000,000
ISK
|
742,000,000
ISK
|
685,000,000
ISK
|
— | — |