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SHARE CAPITAL (Tables)
12 Months Ended
Dec. 31, 2021
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, 2021139,962,6723420
New shares issued (A)1,714,694
At December 31, 2021141,677,3663420
(A)In the year ended December 31, 2021, Constellium SE issued and delivered 1,714,694 ordinary shares to certain employees and directors related to share-based compensation plans.