Corporate Information And Statement Of Ifrs Compliance [Abstract]

Alten - Filing #5981757

Concept	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2023-12-31
Corporate information and statement of IFRS compliance [abstract]
Name of reporting entity or other means of identification	—	ALTEN	—
Domicile of entity	—	France	—
Legal form of entity	—	société anonyme à Conseil d’administration	—
Address of entity's registered office	—	40, avenue André Morizet à Boulogne-Billancourt	—
Description of nature of entity's operations and principal activities	—	Le Groupe ALTEN est leader européen sur le marché de l’Ingénierie et du Conseil en Technologie (ICT). Il réalise des projets de conception et d’études pour les Directions Techniques et systèmes d’information des grands comptes industriels, télécoms et tertiaires.	—
Statement of IFRS compliance [text block]	—	1	—
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [text block]	—	—	—
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [abstract]
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Current trade receivables	1 063 565 EUR	—	1 044 287 EUR
Current trade payables	174 118 EUR	—	160 744 EUR
Explanation of sources of estimation uncertainty with significant risk of causing material adjustment	—	1	—
Dividends recognised as distributions to owners per share	—	150.00	—
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share	—	150.00	—