Statement Of Changes In Equity [Abstract]
| Concept |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||
| Equity |
621,000,000
ISK
|
14,184,000
ISK
|
0
ISK
|
2,483,000
ISK
|
— | — | — |
828,000,000
ISK
|
18,116,000
ISK
|
— |
17,600,000
ISK
|
13,884,000
ISK
|
— |
0
ISK
|
2,517,000
ISK
|
570,000,000
ISK
|
— |
629,000,000
ISK
|
1,061,000
ISK
|
35,261,000
ISK
|
495,000,000
ISK
|
28,887,000
ISK
|
4,242,000
ISK
|
576,000,000
ISK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||
| Comprehensive income | — | — | — | — |
1,381,000
ISK
|
1,381,000
ISK
|
— | — | — |
1,346,000
ISK
|
— | — |
1,346,000
ISK
|
— | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — |
500,000,000
ISK
|
500,000,000
ISK
|
— | — | — |
499,000,000
ISK
|
— | — |
499,000,000
ISK
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — |
258,000,000
ISK
|
0
ISK
|
258,000,000
ISK
|
— | — |
0
ISK
|
— | — |
6,000,000
ISK
|
— | — | — |
6,000,000
ISK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — |
59,000,000
ISK
|
59,000,000
ISK
|
— | — | — |
48,000,000
ISK
|
— | — |
48,000,000
ISK
|
— | — | — | — | — | — | — | — | — | — | — |