Statement Of Comprehensive Income [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 |
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 |
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 comprehensive income [abstract] | ||||||||||||||||||||||||||||||||
| Profit (loss) |
0
NOK
|
0
NOK
|
344,000,000
NOK
|
148,000,000
NOK
|
148,000,000
NOK
|
150,000,000
NOK
|
341,000,000
NOK
|
150,000,000
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
639,000,000
NOK
|
0
NOK
|
0
NOK
|
642,000,000
NOK
|
134,000,000
NOK
|
134,000,000
NOK
|
567,000,000
NOK
|
0
NOK
|
0
NOK
|
561,000,000
NOK
|
0
NOK
|
301,000,000
NOK
|
0
NOK
|
295,000,000
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
132,000,000
NOK
|
132,000,000
NOK
|
| Other comprehensive income [abstract] | ||||||||||||||||||||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||||||||||||||||
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans | — | — | — |
6,000,000
NOK
|
6,000,000
NOK
|
6,000,000
NOK
|
— |
6,000,000
NOK
|
— | — | — | — |
12,000,000
NOK
|
— | — |
12,000,000
NOK
|
18,000,000
NOK
|
18,000,000
NOK
|
36,000,000
NOK
|
— | — |
36,000,000
NOK
|
— | — | — | — | — | — | — | — |
18,000,000
NOK
|
18,000,000
NOK
|
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||||||||||||||||
| Cost of hedging [abstract] | ||||||||||||||||||||||||||||||||
| Change in value of foreign currency basis spreads [abstract] | ||||||||||||||||||||||||||||||||
| Other comprehensive income, before tax, change in value of foreign currency basis spreads | — | — |
3,000,000
NOK
|
— | — | — |
0
NOK
|
— | — | — | — | — |
0
NOK
|
— | — |
3,000,000
NOK
|
— | — |
3,000,000
NOK
|
— | — |
0
NOK
|
— |
3,000,000
NOK
|
— |
0
NOK
|
— | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||||||||||||||||||
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income | — | — | — |
2,000,000
NOK
|
2,000,000
NOK
|
1,000,000
NOK
|
— |
1,000,000
NOK
|
— | — | — | — |
3,000,000
NOK
|
— | — |
3,000,000
NOK
|
4,000,000
NOK
|
4,000,000
NOK
|
9,000,000
NOK
|
— | — |
9,000,000
NOK
|
— | — | — | — | — | — | — | — |
5,000,000
NOK
|
5,000,000
NOK
|
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||||||||||||||||
| Income tax relating to change in value of foreign currency basis spreads included in other comprehensive income | — | — |
1,000,000
NOK
|
— | — | — |
0
NOK
|
— | — | — | — | — |
0
NOK
|
— | — |
1,000,000
NOK
|
— | — |
1,000,000
NOK
|
— | — |
0
NOK
|
— |
1,000,000
NOK
|
— |
0
NOK
|
— | — | — | — | — | — |
| Other comprehensive income |
0
NOK
|
0
NOK
|
2,000,000
NOK
|
4,000,000
NOK
|
4,000,000
NOK
|
5,000,000
NOK
|
0
NOK
|
5,000,000
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
9,000,000
NOK
|
0
NOK
|
0
NOK
|
11,000,000
NOK
|
14,000,000
NOK
|
14,000,000
NOK
|
25,000,000
NOK
|
0
NOK
|
0
NOK
|
27,000,000
NOK
|
0
NOK
|
2,000,000
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
13,000,000
NOK
|
13,000,000
NOK
|
| Comprehensive income |
0
NOK
|
0
NOK
|
346,000,000
NOK
|
152,000,000
NOK
|
152,000,000
NOK
|
155,000,000
NOK
|
341,000,000
NOK
|
155,000,000
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
648,000,000
NOK
|
0
NOK
|
0
NOK
|
653,000,000
NOK
|
120,000,000
NOK
|
120,000,000
NOK
|
542,000,000
NOK
|
0
NOK
|
0
NOK
|
534,000,000
NOK
|
0
NOK
|
303,000,000
NOK
|
0
NOK
|
295,000,000
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
0
NOK
|
119,000,000
NOK
|
119,000,000
NOK
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — | — | — | — | — | — |
625,000,000
NOK
|
— | — |
630,000,000
NOK
|
— | — |
515,000,000
NOK
|
— | — |
507,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — |