Statement Of Changes In Equity [Abstract]

AtoS SE - Filing #2810615

Concept	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	2022-01-01 to 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	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	As at 2021-12-31	As at 2021-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	—	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	—	—	—	5 790 EUR	2 962 EUR	1 498 EUR	4 444 EUR	4 437 EUR	6,000,000 EUR	111,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	3 439 EUR	3 441 EUR	—	—	- EUR	—	3 441 EUR	1,000,000 EUR	—	—	—	—	—	—	- EUR	—	—	1 012 EUR	—	—	0 EUR	—	—	—	—	1 012 EUR	1 012 EUR	—	—	—	—	—	—	—	—
Other comprehensive income	309,000,000 EUR	—	—	—	309,000,000 EUR	—	309,000,000 EUR	0 EUR	—	—	—	—	—	—	345,000,000 EUR	—	—	345,000,000 EUR	—	—	0 EUR	—	—	—	—	—	345,000,000 EUR	—	—	—	—	—	—	—	—
Comprehensive income	3 748 EUR	3 441 EUR	—	—	309,000,000 EUR	—	3 750 EUR	1,000,000 EUR	—	- EUR	—	—	- EUR	—	345,000,000 EUR	—	- EUR	668,000,000 EUR	—	—	0 EUR	—	—	—	—	1 012 EUR	668,000,000 EUR	- EUR	—	—	—	—	—	—	—
Issue of equity	- EUR	—	—	—	- EUR	—	- EUR	—	—	0 EUR	—	—	0 EUR	—	- EUR	—	—	1,000,000 EUR	—	—	—	—	—	—	—	—	1,000,000 EUR	1,000,000 EUR	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	3,000,000 EUR	—	—	—	0 EUR	—	0 EUR	3,000,000 EUR	—	—	—	—	—	—	0 EUR	—	—	3,000,000 EUR	—	—	2,000,000 EUR	—	—	—	—	—	0 EUR	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	1,000,000 EUR	—	—	—	1,000,000 EUR	—	1,000,000 EUR	0 EUR	—	—	—	—	—	—	1,000,000 EUR	—	—	4,000,000 EUR	—	—	3,000,000 EUR	—	—	—	—	—	1,000,000 EUR	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	3,000,000 EUR	—	—	—	3,000,000 EUR	—	3,000,000 EUR	—	—	—	—	—	—	—	2,000,000 EUR	—	—	2,000,000 EUR	—	—	—	—	—	—	—	—	2,000,000 EUR	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	17,000,000 EUR	—	—	—	17,000,000 EUR	—	17,000,000 EUR	—	—	—	—	—	—	—	23,000,000 EUR	—	—	23,000,000 EUR	—	—	—	—	—	—	—	—	23,000,000 EUR	—	—	—	—	—	—	—	—