Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||
| Dividends recognised as distributions to owners of parent |
-
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
468,000,000
NOK
|
-
NOK
|
468,000,000
NOK
|
468,000,000
NOK
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to non-controlling interests |
140,000,000
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
16,000,000
NOK
|
-
NOK
|
124,000,000
NOK
|
16,000,000
NOK
|
15,000,000
NOK
|
-
NOK
|
46,000,000
NOK
|
-
NOK
|
61,000,000
NOK
|
-
NOK
|
15,000,000
NOK
|
-
NOK
|
| Increase (decrease) through acquisition of subsidiary, equity |
67,000,000
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
20,000,000
NOK
|
-
NOK
|
87,000,000
NOK
|
20,000,000
NOK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through disposal of subsidiary, equity |
5,249,000,000
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
5,249,000,000
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
2,000,000
NOK
|
-
NOK
|
2,000,000
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
| Increase (decrease) through exercise of options, equity |
4,000,000
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
49,000,000
NOK
|
-
NOK
|
53,000,000
NOK
|
49,000,000
NOK
|
3,000,000
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
3,000,000
NOK
|
-
NOK
|
3,000,000
NOK
|
-
NOK
|
| Increase (decrease) through transactions with owners, equity |
5,421,000,000
NOK
|
-
NOK
|
-
NOK
|
-
NOK
|
562,000,000
NOK
|
33,000,000
NOK
|
5,983,000,000
NOK
|
595,000,000
NOK
|
133,000,000
NOK
|
-
NOK
|
119,000,000
NOK
|
-
NOK
|
48,000,000
NOK
|
-
NOK
|
72,000,000
NOK
|
61,000,000
NOK
|