Statement Of Comprehensive Income [Abstract]

NCC Group - Filing #703285

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	2020-01-01 to 2020-12-31
Statement of comprehensive income [abstract]
Profit (loss)	—	1 508 SEK	1 508 SEK	1 508 SEK	1 259 SEK	1 259 SEK	1 259 SEK	—
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract]
Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans	—	—	942,000,000 SEK	—	—	111,000,000 SEK	—	—
Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract]
Exchange differences on translation [abstract]
Gains (losses) on exchange differences on translation of foreign operations, before tax	—	—	99,000,000 SEK	—	—	12 7 SEK	—	—
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract]
Income tax relating to remeasurements of defined benefit plans included in other comprehensive income	—	—	19 4 SEK	—	—	2 3 SEK	—	—
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract]
Income tax relating to cash flow hedges included in other comprehensive income	—	—	15,000,000 SEK	—	—	2,000,000 SEK	—	—
Other comprehensive income	15 7 SEK	905,000,000 SEK	90 5 SEK	74 8 SEK	88,000,000 SEK	3 2 SEK	3 2 SEK	12 1 SEK
Comprehensive income	15 7 SEK	2 413 SEK	2 413 SEK	2 256 SEK	1 347 SEK	1 226 SEK	1 226 SEK	12 1 SEK
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	2 413 SEK	—	—	1 226 SEK	—	—