Statement Of Changes In Equity [Abstract]

AB Sagax - Filing #701620

Concept	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	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 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	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 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
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	26 228 SEK	493,000,000 SEK	—	—	31 079 SEK	—	31 079 SEK	3 578 SEK	—	780,000,000 SEK	—	—	17 76 5 SEK	—	338,000,000 SEK	22 452 SEK	808,000,000 SEK	—	3 542 SEK	—	22 452 SEK	—	—	675,000,000 SEK	19 2 57 SEK	3 046 SEK	14 76 0 SEK	7 76 SEK
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	—	—	—	—	—	—	—	9 807 SEK	—	—	3 711 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	—	15 5 SEK	15 5 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	337,000,000 SEK	—	—	337,000,000 SEK	—	—	—	—	—
Comprehensive income	—	—	—	9 807 SEK	—	—	—	—	—	—	9 963 SEK	9 807 SEK	—	3 3 74 SEK	—	—	—	3 711 SEK	—	—	—	—	3 711 SEK	—	—	—	—	—
Increase through other contributions by owners, equity	—	—	—	36,000,000 SEK	—	36,000,000 SEK	—	—	1,000,000 SEK	—	—	—	—	—	—	—	—	—	—	—	—	19,000,000 SEK	20,000,000 SEK	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	—	7,000,000 SEK	—	—	—	—	—	—	—	7,000,000 SEK	—	—	—	—	—	5,000,000 SEK	—	—	—	—	5,000,000 SEK	—	—	—	—	—