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Share Capital (Tables)
 6 Months Ended
Jun. 30, 2019
Text block [abstract]  
Schedule of Share Capital
            in millions of Euros  
     Number of                
     shares      Share capital      Share premium  

At January 1, 2019

      135,999,394        3        420  

New shares issued (A)

      817,627        —          —    
  

 

 

     

 

 

     

 

 

  

At June 30, 2019

      136,817,021        3        420  
  

 

 

     

 

 

     

 

 

  

 

(A)

Constellium SE issued and granted Class A ordinary shares to certain employees related to share-based compensation plans.