Statement Of Comprehensive Income [Abstract]

Sweco - Filing #702976

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	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Statement of comprehensive income [abstract]
Profit (loss)	0 SEK	—	1 492 SEK	1 492 SEK	1 492 SEK	1 292 SEK	1 293 SEK	1,000,000 SEK	1 292 SEK	—
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans	—	—	—	4,000,000 SEK	—	—	34,000,000 SEK	—	—	—
Other comprehensive income that will not be reclassified to profit or loss, net of tax	—	—	—	4,000,000 SEK	—	—	34,000,000 SEK	—	—	—
Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]
Exchange differences on translation [abstract]
Gains (losses) on exchange differences on translation of foreign operations, net of tax	—	—	—	198,000,000 SEK	—	—	366,000,000 SEK	—	—	—
Hedges of net investment in foreign operations [abstract]
Gains (losses) on hedges of net investments in foreign operations, net of tax	—	—	—	1 8 SEK	—	—	52,000,000 SEK	—	—	—
Other comprehensive income that will be reclassified to profit or loss, net of tax	—	—	—	180,000,000 SEK	—	—	314,000,000 SEK	—	—	—
Other comprehensive income	0 SEK	180,000,000 SEK	184,000,000 SEK	184,000,000 SEK	4,000,000 SEK	34,000,000 SEK	348,000,000 SEK	0 SEK	348,000,000 SEK	314,000,000 SEK
Comprehensive income	0 SEK	180,000,000 SEK	1 676 SEK	1 676 SEK	1 496 SEK	1 259 SEK	945,000,000 SEK	0 SEK	945,000,000 SEK	314,000,000 SEK
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	1 676 SEK	—	—	945,000,000 SEK	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	0 SEK	—	—	0 SEK	—	—	—