Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity | — |
493,000,000
NOK
|
— |
9,919,000,000
NOK
|
— | — |
111,000,000
NOK
|
— |
9,271,000,000
NOK
|
9,775,000,000
NOK
|
— |
95,000,000
NOK
|
4,000,000
NOK
|
649,000,000
NOK
|
— | — | — |
708,000,000
NOK
|
673,000,000
NOK
|
8,794,000,000
NOK
|
4,000,000
NOK
|
— |
40,000,000
NOK
|
9,720,000,000
NOK
|
— |
9,467,000,000
NOK
|
— | — | — |
261,000,000
NOK
|
— | — |
2,975,000,000
NOK
|
663,000,000
NOK
|
128,000,000
NOK
|
3,108,000,000
NOK
|
3,640,000,000
NOK
|
134,000,000
NOK
|
3,000,000
NOK
|
130,000,000
NOK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
68,000,000
NOK
|
— |
388,000,000
NOK
|
— |
-
NOK
|
-
NOK
|
— |
-
NOK
|
— | — |
-
NOK
|
— | — | — |
456,000,000
NOK
|
388,000,000
NOK
|
368,000,000
NOK
|
— | — | — | — |
478,000,000
NOK
|
— | — |
-
NOK
|
— |
-
NOK
|
110,000,000
NOK
|
-
NOK
|
— |
478,000,000
NOK
|
-
NOK
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
110,000,000
NOK
|
— |
206,000,000
NOK
|
— |
-
NOK
|
55,000,000
NOK
|
— |
150,000,000
NOK
|
— | — |
-
NOK
|
— | — | — |
317,000,000
NOK
|
1,000,000
NOK
|
394,000,000
NOK
|
— | — | — | — |
-
NOK
|
— | — |
-
NOK
|
— |
89,000,000
NOK
|
174,000,000
NOK
|
-
NOK
|
— |
219,000,000
NOK
|
131,000,000
NOK
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
178,000,000
NOK
|
— |
595,000,000
NOK
|
— |
-
NOK
|
55,000,000
NOK
|
— |
150,000,000
NOK
|
— | — |
-
NOK
|
— | — | — |
773,000,000
NOK
|
390,000,000
NOK
|
762,000,000
NOK
|
— | — | — | — |
478,000,000
NOK
|
— | — |
-
NOK
|
— |
89,000,000
NOK
|
65,000,000
NOK
|
-
NOK
|
— |
698,000,000
NOK
|
131,000,000
NOK
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
217,000,000
NOK
|
— |
173,000,000
NOK
|
— |
-
NOK
|
-
NOK
|
— |
-
NOK
|
— | — |
-
NOK
|
— | — | — |
390,000,000
NOK
|
173,000,000
NOK
|
279,000,000
NOK
|
— | — | — | — |
131,000,000
NOK
|
— | — |
-
NOK
|
— |
-
NOK
|
148,000,000
NOK
|
-
NOK
|
— |
131,000,000
NOK
|
-
NOK
|
— | — | — | — | — | — | — | — |
| Increase through other contributions by owners, equity |
-
NOK
|
— |
42,000,000
NOK
|
— |
42,000,000
NOK
|
-
NOK
|
— |
-
NOK
|
— | — |
-
NOK
|
— | — | — |
42,000,000
NOK
|
-
NOK
|
6,744,000,000
NOK
|
— | — | — | — |
-
NOK
|
— | — |
1,000,000
NOK
|
— |
-
NOK
|
-
NOK
|
6,743,000,000
NOK
|
— |
6,744,000,000
NOK
|
-
NOK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
-
NOK
|
— |
12,000,000
NOK
|
— |
12,000,000
NOK
|
-
NOK
|
— |
-
NOK
|
— | — |
-
NOK
|
— | — | — |
12,000,000
NOK
|
-
NOK
|
14,000,000
NOK
|
— | — | — | — |
-
NOK
|
— | — |
-
NOK
|
— |
-
NOK
|
-
NOK
|
14,000,000
NOK
|
— |
14,000,000
NOK
|
-
NOK
|
— | — | — | — | — | — | — | — |