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 |
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 |
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 |
2020-01-01 to 2020-12-31 |
As at 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 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 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 |
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 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
2 581
NOK
|
— |
2 865
NOK
|
110,000,000
NOK
|
— | — |
85,000,000
NOK
|
— |
2 848
NOK
|
419,000,000
NOK
|
17,000,000
NOK
|
25,000,000
NOK
|
67,000,000
NOK
|
— | — | — |
2 514
NOK
|
25,000,000
NOK
|
— |
2 853
NOK
|
67,000,000
NOK
|
— | — | — |
46,000,000
NOK
|
54,000,000
NOK
|
419,000,000
NOK
|
2 877
NOK
|
— | — |
156,000,000
NOK
|
— |
3 807
NOK
|
142,000,000
NOK
|
9,000,000
NOK
|
17,000,000
NOK
|
419,000,000
NOK
|
3 949
NOK
|
3 405
NOK
|
93,000,000
NOK
|
34,000,000
NOK
|
67,000,000
NOK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
71,000,000
NOK
|
— |
958,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — |
1 029
NOK
|
958,000,000
NOK
|
2 189
NOK
|
— | — | — | — | — |
2 108
NOK
|
— | — | — | — | — | — | — |
81,000,000
NOK
|
— |
2 108
NOK
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — |
72,000,000
NOK
|
— | — |
39,000,000
NOK
|
79,000,000
NOK
|
— |
46,000,000
NOK
|
— | — | — | — | — |
75,000,000
NOK
|
-
NOK
|
45,000,000
NOK
|
— | — |
37,000,000
NOK
|
— | — |
15,000,000
NOK
|
34,000,000
NOK
|
63,000,000
NOK
|
— | — | — | — |
71,000,000
NOK
|
3,000,000
NOK
|
— |
48,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
954,000,000
NOK
|
— |
2 144
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
60,000,000
NOK
|
— |
776,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — |
836,000,000
NOK
|
776,000,000
NOK
|
3 071
NOK
|
— | — | — | — | — |
3 037
NOK
|
— | — | — | — | — | — | — |
35,000,000
NOK
|
— |
3 037
NOK
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
38,000,000
NOK
|
— |
76,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — |
114,000,000
NOK
|
76,000,000
NOK
|
119,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
119,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
22,000,000
NOK
|
— |
30,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
38,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — |
38,000,000
NOK
|
38,000,000
NOK
|
4,000,000
NOK
|
— | — | — | — | — |
4,000,000
NOK
|
— | — | — | — | — | — | — | — | — |
4,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — |