Statement Of Financial Position [Abstract]

AtoS SE - Filing #5982713

Concept	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 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 financial position [abstract]
Assets [abstract]
Non-current assets [abstract]
Property, plant and equipment	—	—	—	—	—	580,000,000 EUR	—	355,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Right-of-use assets	—	—	—	—	—	550,000,000 EUR	—	687,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Goodwill	—	—	—	—	—	653,000,000 EUR	—	2 875 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Intangible assets other than goodwill	—	—	—	—	—	349,000,000 EUR	—	529,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Investments accounted for using equity method	—	—	—	—	—	12,000,000 EUR	—	11,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Other non-current financial assets	—	—	—	—	—	131,000,000 EUR	—	142,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Non-current assets	—	—	—	—	—	2 458 EUR	—	4 806 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Current assets [abstract]
Current tax assets, current	—	—	—	—	—	102,000,000 EUR	—	83,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Cash and cash equivalents	—	—	—	—	—	1 739 EUR	—	2 295 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Current assets	—	—	—	—	—	5 788 EUR	—	6 488 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Assets	—	—	—	—	—	8 246 EUR	—	11 294 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	—	—	—	—	—	18,000,000 EUR	—	111,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity attributable to owners of parent	—	—	—	—	—	799,000,000 EUR	—	55,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Non-controlling interests	—	—	—	—	—	0 EUR	—	5,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
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
Liabilities [abstract]
Non-current liabilities [abstract]
Non-current provisions [abstract]
Non-current provisions for employee benefits	—	—	—	—	—	782,000,000 EUR	—	741,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Other non-current provisions	—	—	—	—	—	345,000,000 EUR	—	282,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Non-current liabilities	—	—	—	—	—	3 787 EUR	—	4 177 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Current liabilities [abstract]
Current provisions [abstract]
Current provisions	—	—	—	—	—	315,000,000 EUR	—	280,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Current tax liabilities, current	—	—	—	—	—	75,000,000 EUR	—	74,000,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Current liabilities	—	—	—	—	—	3 660 EUR	—	7 056 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities	—	—	—	—	—	8 246 EUR	—	11 294 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—