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Subsidiaries and Operating Segments (Tables)
 12 Months Ended
Dec. 31, 2018
Investments accounted for using equity method [abstract]  
Summary of Group's Affiliates are Included in Consolidated Financial Statements

The following Group’s affiliates are legal entities included in the Consolidated Financial Statements of the Group at December 31, 2018.

 

Entity

    Country      % Group Interest     Consolidation
Method		  

Cross Operating Segment

        

Constellium Singen GmbH (AS&I and P&ARP)

      Germany        100%       Full  

Constellium Valais S.A. (AS&I and A&T)

      Switzerland        100%       Full  

AS&I

        

Constellium Automotive USA, LLC

      US        100%       Full  

Constellium Engley (Changchun) Automotive Structures Co Ltd.

      China        54%       Full  

Constellium Extrusions Decin S.r.o.

      Czech Republic        100%       Full  

Constellium Extrusions Deutschland GmbH

      Germany        100%       Full  

Constellium Extrusions Landau GmbH

      Germany        100%       Full  

Constellium Extrusions Burg GmbH

      Germany        100%       Full  

Constellium Extrusions France S.A.S.

      France        100%       Full  

Constellium Extrusions Levice S.r.o.

      Slovakia        100%       Full  

Constellium Automotive Mexico, S. DE R.L. DE C.V.

      Mexico        100%       Full  

Constellium Automotive Mexico Trading, S. DE R.L. DE C.V.

      Mexico        100%       Full  

Astrex Inc

      Canada        50%       Full  

Constellium Automotive Zilina S.r.o.

    Slovakia      100%       Full  

Constellium Automotive Nanjing Co Ltd

    China      100%       Full  

Constellium Automotive Spain SL

    Spain      100%       Full  

A&T

        

Constellium Issoire S.A.S.

    France      100%       Full  

Constellium Montreuil Juigné S.A.S.

    France      100%       Full  

Constellium China Limited

    China      100%       Full  

Constellium Japan KK

    Japan      100%       Full  

Constellium Rolled Products Ravenswood, LLC

    US      100%       Full  

Constellium Southeast Asia PTE LTD

    Singapore      100%       Full  

Constellium Ussel S.A.S.

    France      100%       Full  

AluInfra Services SA(A)

    Switzerland      50%       Full  

P&ARP

        

Constellium Deutschland GmbH

    Germany      100%       Full  

Constellium Rolled Products Singen GmbH KG

    Germany      100%       Full  

Constellium Property and Equipment Company, LLC

    US      100%       Full  

Constellium Neuf Brisach

    France      100%       Full  

Constellium Muscle Shoals LLC

    US      100%       Full  

Constellium Holding Muscle Shoals LLC

    US      100%       Full  

Constellium Muscle Shoals Funding II LLC

    US      100%       Full  

Listerhill Total Maintenance Center LLC

    US      100%       Full  

Constellium Metal Procurement LLC

    US      100%       Full  

Constellium-UACJ ABS LLC

    US      51%       Equity  

Rhenaroll

    France      50%       Equity  

Holdings & Corporate

        

C-TEC Constellium Technology Center S.A.S.

    France      100%       Full  

Constellium Finance S.A.S.

    France      100%       Full  

Constellium France III

    France      100%       Full  

Constellium France Holdco S.A.S.

    France      100%       Full  

Constellium International

    France      100%       Full  

Constellium Paris S.A.S

    France      100%       Full  

Constellium Germany Holdco GmbH & Co. KG

    Germany      100%       Full  

Constellium Germany Verwaltungs GmbH

    Germany      100%       Full  

Constellium UK Limited

    United Kingdom      100%       Full  

Constellium U.S. Holdings I, LLC

    US      100%       Full  

Constellium Switzerland AG

    Switzerland      100%       Full  

Constellium W S.A.S.

    France      100%       Full  

Constellium Treuhand UG

    Germany      100%       Full  

Engineered Products International S.A.S.

    France      100%       Full  

 

(A)

AluInfra Services SA, the joint venture created with Novelis in July 2018, is consolidated as a joint operation and is immaterial in the Group Consolidated Financial Statements