Statement Of Financial Position [Abstract]
| Concept |
As at 2021-12-31 |
As at 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||
| Assets [abstract] | |||||||||||
| Property, plant and equipment |
1.440, 3
NOK
|
1,149,600
NOK
|
— | — | — | — | — | — | — | — | — |
| Goodwill |
3,954,500
NOK
|
3,773,400
NOK
|
— | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
1.732, 0
NOK
|
1,132,400
NOK
|
— | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method |
1.280, 9
NOK
|
3,760,200
NOK
|
— | — | — | — | — | — | — | — | — |
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners |
4.247, 9
NOK
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
241,000,000
NOK
|
207,000,000
NOK
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
2.348, 1
NOK
|
2,861,100
NOK
|
— | — | — | — | — | — | — |
2,419,500
NOK
|
— |
| Assets |
129,822,100
NOK
|
118,312,000
NOK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||
| Equity [abstract] | |||||||||||
| Issued capital |
9,999,000,000
NOK
|
1. 000,0
NOK
|
— | — | — | — | — | — | — | — | — |
| Share premium |
1,430,000
NOK
|
1,430,000
NOK
|
— | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
25,204,500
NOK
|
25,283,800
NOK
|
— | — | — | — | — | — | — | — | — |
| Non-controlling interests |
7,000,000
NOK
|
7,000,000
NOK
|
— | — | — | — | — | — | — | — | — |
| Equity |
25.205, 2
NOK
|
25.284, 5
NOK
|
24,182,100
NOK
|
2,058,100
NOK
|
5,659,000,000
NOK
|
695,000,000
NOK
|
1,002,300
NOK
|
0
NOK
|
1,430,000
NOK
|
26,191,600
NOK
|
1.000, 0
NOK
|
| Liabilities [abstract] | |||||||||||
| Provisions [abstract] | |||||||||||
| Provisions for employee benefits |
712, 4
NOK
|
7,168,000,000
NOK
|
— | — | — | — | — | — | — | — | — |
| Other provisions |
613, 5
NOK
|
3,007,000,000
NOK
|
— | — | — | — | — | — | — | — | — |
| Other financial liabilities |
3,377,800
NOK
|
2,777,300
NOK
|
— | — | — | — | — | — | — | — | — |
| Insurance contracts issued that are liabilities |
7,894,500
NOK
|
7,364,100
NOK
|
— | — | — | — | — | — | — | — | — |
| Current tax liabilities |
1.522, 7
NOK
|
1,559,900
NOK
|
— | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
614, 2
NOK
|
9,562,000,000
NOK
|
— | — | — | — | — | — | — | — | — |
| Liabilities |
104,616,900
NOK
|
93,027,500
NOK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities |
129,822,100
NOK
|
118,312,000
NOK
|
— | — | — | — | — | — | — | — | — |