Statement Of Changes In Equity [Abstract]

AtoS SE - Filing #856904

Concept	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	2022-01-01 to 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	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 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	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	3 799 EUR	—	—	3 195 EUR	—	7,000,000 EUR	111,000,000 EUR	3 793 EUR	—	1 499 EUR	—	—	1 012 EUR	—	5 790 EUR	111,000,000 EUR	1 498 EUR	—	4 444 EUR	4 437 EUR	6,000,000 EUR	—	2 962 EUR	—	—	—	—	4 724 EUR	10,000,000 EUR	1 476 EUR	6 861 EUR	110,000,000 EUR	6 871 EUR	550,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	- EUR	—	—	1 012 EUR	—	0 EUR	—	—	—	—	—	1 012 EUR	1 012 EUR	—	3,000,000 EUR	—	—	—	2 962 EUR	—	—	—	—	—	- EUR	2 962 EUR	—	2 959 EUR	—	—	—	—	—	—	—
Other comprehensive income	345,000,000 EUR	—	—	345,000,000 EUR	—	0 EUR	—	—	—	—	—	345,000,000 EUR	—	—	- EUR	—	—	—	636,000,000 EUR	—	—	—	—	—	636,000,000 EUR	—	—	636,000,000 EUR	—	—	—	—	—	—	—
Comprehensive income	345,000,000 EUR	—	- EUR	668,000,000 EUR	—	0 EUR	—	—	—	- EUR	—	668,000,000 EUR	1 012 EUR	—	3,000,000 EUR	—	—	—	2 326 EUR	—	—	—	- EUR	—	636,000,000 EUR	2 962 EUR	- EUR	2 323 EUR	—	—	—	—	—	—	—
Issue of equity	- EUR	—	—	1,000,000 EUR	—	—	—	—	—	1,000,000 EUR	—	1,000,000 EUR	—	—	—	—	—	—	23,000,000 EUR	—	—	—	1,000,000 EUR	—	- EUR	—	22,000,000 EUR	23,000,000 EUR	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	0 EUR	—	—	3,000,000 EUR	—	2,000,000 EUR	—	—	—	—	—	0 EUR	—	—	3,000,000 EUR	—	—	—	98,000,000 EUR	—	—	—	—	—	98,000,000 EUR	—	—	101,000,000 EUR	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	1,000,000 EUR	—	—	4,000,000 EUR	—	3,000,000 EUR	—	—	—	—	—	1,000,000 EUR	—	—	4,000,000 EUR	—	—	—	4,000,000 EUR	—	—	—	—	—	4,000,000 EUR	—	—	1,000,000 EUR	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	2,000,000 EUR	—	—	2,000,000 EUR	—	—	—	—	—	—	—	2,000,000 EUR	—	—	—	—	—	—	58,000,000 EUR	—	—	—	—	—	58,000,000 EUR	—	—	58,000,000 EUR	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	23,000,000 EUR	—	—	23,000,000 EUR	—	—	—	—	—	—	—	23,000,000 EUR	—	—	—	—	—	—	32,000,000 EUR	—	—	—	—	—	32,000,000 EUR	—	—	32,000,000 EUR	—	—	—	—	—	—	—