Statement Of Comprehensive Income [Abstract]

AtoS SE - Filing #2810615

Concept	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31
Statement of comprehensive income [abstract]
Profit (loss)	—	—	3 439 EUR	3 441 EUR	- EUR	1,000,000 EUR	3 441 EUR	- EUR	1 012 EUR	—	1 012 EUR	1 012 EUR	0 EUR	—
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	—	—	121,000,000 EUR	—	—	—	—	—	—	—	—	149,000,000 EUR	—	—
Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract]
Exchange differences on translation [abstract]
Other comprehensive income, before tax, exchange differences on translation of foreign operations	—	—	156,000,000 EUR	—	—	—	—	—	—	—	—	236,000,000 EUR	—	—
Cash flow hedges [abstract]
Other comprehensive income, before tax, cash flow hedges	—	—	6,000,000 EUR	—	—	—	—	—	—	—	—	3,000,000 EUR	—	—
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	—	—	36,000,000 EUR	—	—	—	—	—	—	—	—	38,000,000 EUR	—	—
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract]
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss	—	—	1,000,000 EUR	—	—	—	—	—	—	—	—	1,000,000 EUR	—	—
Other comprehensive income	—	—	309,000,000 EUR	—	309,000,000 EUR	0 EUR	309,000,000 EUR	345,000,000 EUR	—	—	345,000,000 EUR	345,000,000 EUR	0 EUR	—
Comprehensive income	- EUR	- EUR	3 748 EUR	3 441 EUR	309,000,000 EUR	1,000,000 EUR	3 750 EUR	345,000,000 EUR	1 012 EUR	- EUR	668,000,000 EUR	668,000,000 EUR	0 EUR	- EUR
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	3 750 EUR	—	—	—	—	—	—	—	—	668,000,000 EUR	—	—
Comprehensive income, attributable to non-controlling interests	—	—	1,000,000 EUR	—	—	—	—	—	—	—	—	0 EUR	—	—