Statement Of Changes In Equity [Abstract]

AtoS SE - Filing #5982713

Concept	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	1 354 EUR	—	—	—	18,000,000 EUR	0 EUR	—	799,000,000 EUR	—	—	1 887 EUR	799,000,000 EUR	248,000,000 EUR	—	—	61,000,000 EUR	1 887 EUR	—	3 441 EUR	—	—	5,000,000 EUR	—	111,000,000 EUR	55,000,000 EUR	—	1 499 EUR	3 799 EUR	1 012 EUR	3 195 EUR	7,000,000 EUR	111,000,000 EUR	3 793 EUR	1 499 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	248,000,000 EUR	—	- EUR	248,000,000 EUR	- EUR	—	—	0 EUR	—	248,000,000 EUR	- EUR	—	—	—	3 439 EUR	3 441 EUR	—	—	- EUR	—	3 441 EUR	1,000,000 EUR	—	- EUR	—	—	- EUR	—	—	—	—	—	—	—	—
Other comprehensive income	- EUR	—	41,000,000 EUR	41,000,000 EUR	- EUR	—	—	0 EUR	—	41,000,000 EUR	- EUR	—	—	—	309,000,000 EUR	- EUR	—	—	309,000,000 EUR	—	309,000,000 EUR	0 EUR	—	- EUR	—	—	- EUR	—	—	—	—	—	—	—	—
Comprehensive income	248,000,000 EUR	—	41,000,000 EUR	290,000,000 EUR	- EUR	—	—	0 EUR	—	290,000,000 EUR	- EUR	—	—	—	3 748 EUR	3 441 EUR	—	—	309,000,000 EUR	—	3 750 EUR	1,000,000 EUR	—	- EUR	—	—	- EUR	—	—	—	—	—	—	—	—
Issue of equity	- EUR	—	112,000,000 EUR	3 166 EUR	94,000,000 EUR	—	—	- EUR	—	3 166 EUR	3 147 EUR	—	—	—	- EUR	- EUR	—	—	- EUR	—	- EUR	- EUR	—	0 EUR	—	—	0 EUR	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	- EUR	—	0 EUR	0 EUR	- EUR	—	—	5,000,000 EUR	—	5,000,000 EUR	- EUR	—	—	—	3,000,000 EUR	- EUR	—	—	0 EUR	—	0 EUR	3,000,000 EUR	—	- EUR	—	—	- EUR	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	- EUR	—	45,000,000 EUR	2 714 EUR	- EUR	—	—	1,000,000 EUR	—	2 714 EUR	2 759 EUR	—	—	—	1,000,000 EUR	- EUR	—	—	1,000,000 EUR	—	1,000,000 EUR	0 EUR	—	- EUR	—	—	- EUR	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	- EUR	—	2,000,000 EUR	2,000,000 EUR	- EUR	—	—	- EUR	—	2,000,000 EUR	- EUR	—	—	—	3,000,000 EUR	- EUR	—	—	3,000,000 EUR	—	3,000,000 EUR	- EUR	—	- EUR	—	—	- EUR	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	- EUR	—	4,000,000 EUR	4,000,000 EUR	- EUR	—	—	- EUR	—	4,000,000 EUR	- EUR	—	—	—	17,000,000 EUR	- EUR	—	—	17,000,000 EUR	—	17,000,000 EUR	- EUR	—	- EUR	—	—	- EUR	—	—	—	—	—	—	—	—