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 |
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 non-controlling interests |
47,000,000
SEK
|
— |
47,000,000
SEK
|
— | — | — | — |
| Increase (decrease) through exercise of options, equity | — | — |
22,000,000
SEK
|
22,000,000
SEK
|
11,000,000
SEK
|
11,000,000
SEK
|
— |
| Purchase of treasury shares | — |
18 3
SEK
|
18 3
SEK
|
— | — |
95,000,000
SEK
|
95,000,000
SEK
|
| Sale or issue of treasury shares | — |
102,000,000
SEK
|
60,000,000
SEK
|
42,000,000
SEK
|
25,000,000
SEK
|
54,000,000
SEK
|
79,000,000
SEK
|