Statement Of Changes In Equity [Abstract]

BTS Group - Filing #701424

Concept	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	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	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	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
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	943 492 SEK	28 407 SEK	—	983 250 SEK	—	4 893 SEK	—	6 458 SEK	—	—	735 115 SEK	—	6 439 SEK	—	36 319 SEK	4 621 SEK	—	—	709 857 SEK	—	58 637 SEK	5 063 SEK	839 678 SEK	769 539 SEK	6 439 SEK
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	—	—	—	—	—	214 702 SEK	214 702 SEK	—	35 226 SEK	—	35 226 SEK	—	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	—	—	—	—	—	—	—	—	64 998 SEK	—	—	95 397 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	—	—	64 726 SEK	—	272,000 SEK	—	—	—	279 700 SEK	214 702 SEK	—	60 171 SEK	—	35 226 SEK	—	—	94 956 SEK	0 SEK	—	4 41 SEK	—	—	—	—	—
Issue of equity	—	—	—	—	—	—	19,000 SEK	—	16 862 SEK	16 843 SEK	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	—	—	—	—	—	—	94,000 SEK	94,000 SEK	—	232,000 SEK	—	232,000 SEK	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	—	—	—	—	—	—	119,000 SEK	119,000 SEK	—	128,000 SEK	—	128,000 SEK	—	—	—	—	—	—	—	—	—	—	—