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SHARE CAPITAL (Tables)
12 Months Ended
Dec. 31, 2023
Disclosure of share capital, reserves and other equity interest [Abstract]  
Schedule of Share Capital
(in millions of Euros)
Number of sharesShare capitalShare premium
At January 1, 2023144,301,5923420
New shares issued (A)2,518,292
At December 31, 2023146,819,8843420
(A)In the year ended December 31, 2023, Constellium SE issued and delivered 2,518,292 ordinary shares to certain employees and corporate officers under share-based compensation plans.