Statement Of Changes In Equity [Abstract]

Sweco - Filing #702976

Concept	2021-01-01 to 2021-12-31	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	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	As at 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	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	As at 2019-12-31	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	5 311 SEK	75,000,000 SEK	—	—	8 604 SEK	8 594 SEK	3 088 SEK	10,000,000 SEK	121,000,000 SEK	—	—	—	4 445 SEK	10,000,000 SEK	7 548 SEK	121,000,000 SEK	—	105,000,000 SEK	3 088 SEK	—	7 557 SEK	—	—	7 154 SEK	10,000,000 SEK	209,000,000 SEK	3 088 SEK	7 164 SEK	3 736 SEK	121,000,000 SEK
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	0 SEK	—	—	—	1 492 SEK	—	—	—	—	—	1 492 SEK	1 492 SEK	1 293 SEK	—	—	—	—	1 292 SEK	—	—	—	—	1,000,000 SEK	1 292 SEK	—	—	—	—	—	—	—
Other comprehensive income	0 SEK	—	—	180,000,000 SEK	184,000,000 SEK	—	—	—	—	—	184,000,000 SEK	4,000,000 SEK	348,000,000 SEK	—	—	—	—	34,000,000 SEK	—	—	314,000,000 SEK	—	0 SEK	348,000,000 SEK	—	—	—	—	—	—	—
Comprehensive income	0 SEK	—	—	180,000,000 SEK	1 676 SEK	—	—	—	—	—	1 676 SEK	1 496 SEK	945,000,000 SEK	—	—	—	—	1 259 SEK	—	—	314,000,000 SEK	—	0 SEK	945,000,000 SEK	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	0 SEK	—	—	—	782,000,000 SEK	—	—	—	—	—	782,000,000 SEK	782,000,000 SEK	733,000,000 SEK	—	—	—	—	732,000,000 SEK	—	—	—	—	0 SEK	732,000,000 SEK	—	—	—	—	—	—	—