Corporate Information And Statement Of Ifrs Compliance [Abstract]

Alten - Filing #2816643

Concept	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2020-12-31
Corporate information and statement of IFRS compliance [abstract]
Name of reporting entity or other means of identification	—	ALTEN	—
Domicile of entity	—	40	—
Legal form of entity	—	Société anonyme à Conseil d’administration	—
Country of incorporation	—	Française	—
Address of entity's registered office	—	40	—
Principal place of business	—	France	—
Description of nature of entity's operations and principal activities	—	Ingénierie et Conseil en Technologies	—
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	778 784 EUR	—	586 618 EUR
Current trade payables	126 842 EUR	—	99 101 EUR