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SUBSIDIARIES AND OPERATING SEGMENTS | 12 Months Ended
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Dec. 31, 2020
Disclosure of subsidiaries [abstract] |
SUBSIDIARIES AND OPERATING SEGMENTS | NOTE 31 - SUBSIDIARIES AND OPERATING SEGMENTS The following Group’s affiliates are legal entities included in the Consolidated Financial Statements of the Group at December 31, 2020.
Entity |  | Country |  | % Group Interest |  | Consolidation Method
Cross Operating Segment |  |  |  |  |  |
Constellium Singen GmbH (AS&I and P&ARP) |  | Germany |  | 100 | % |  | Consolidated
Constellium Valais S.A. (AS&I and A&T) |  | Switzerland |  | 100 | % |  | Consolidated
AS&I |  |  |  |  |  |
Constellium Automotive USA, LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium Engley (Changchun) Automotive Structures Co Ltd. |  | China |  | 54 | % |  | Consolidated
Constellium Extrusions Decin S.r.o. |  | Czech Republic |  | 100 | % |  | Consolidated
Constellium Extrusions Deutschland GmbH |  | Germany |  | 100 | % |  | Consolidated
Constellium Extrusions Landau GmbH |  | Germany |  | 100 | % |  | Consolidated
Constellium Extrusions Burg GmbH |  | Germany |  | 100 | % |  | Consolidated
Constellium Extrusions France S.A.S. |  | France |  | 100 | % |  | Consolidated
Constellium Extrusions Levice S.r.o. |  | Slovakia |  | 100 | % |  | Consolidated
Constellium Automotive Mexico, S. DE R.L. DE C.V. |  | Mexico |  | 100 | % |  | Consolidated
Constellium Automotive Mexico Trading, S. DE R.L. DE C.V. |  | Mexico |  | 100 | % |  | Consolidated
Astrex Inc |  | Canada |  | 50 | % |  | Consolidated
Constellium Automotive Zilina S.r.o. |  | Slovakia |  | 100 | % |  | Consolidated
Constellium Automotive Nanjing Co Ltd |  | China |  | 100 | % |  | Consolidated
Constellium Automotive Spain SL |  | Spain |  | 100 | % |  | Consolidated
Constellium UK Limited |  | United Kingdom |  | 100 | % |  | Consolidated
A&T |  |  |  |  |  |
Constellium Issoire S.A.S. |  | France |  | 100 | % |  | Consolidated
Constellium Montreuil Juigné S.A.S. |  | France |  | 100 | % |  | Consolidated
Constellium China Limited |  | China |  | 100 | % |  | Consolidated
Constellium Japan KK |  | Japan |  | 100 | % |  | Consolidated
Constellium Rolled Products Ravenswood, LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium Ussel S.A.S. |  | France |  | 100 | % |  | Consolidated
AluInfra Services SA (A) |  | Switzerland |  | 50 | % |  | Consolidated
P&ARP |  |  |  |  |  |
Constellium Deutschland GmbH |  | Germany |  | 100 | % |  | Consolidated
Constellium Rolled Products Singen GmbH KG |  | Germany |  | 100 | % |  | Consolidated
Constellium Property and Equipment Company, LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium Neuf Brisach S.A.S. |  | France |  | 100 | % |  | Consolidated
Constellium Muscle Shoals LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium Holding Muscle Shoals LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium Muscle Shoals Funding II LLC |  | U.S. |  | 100 | % |  | Consolidated
Listerhill Total Maintenance Center LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium Metal Procurement LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium Bowling Green LLC |  | U.S. |  | 100 | % |  | Consolidated
Rhenaroll |  | France |  | 50 | % |  | Equity
Holdings & Corporate |  |  |  |  |  |
C-TEC Constellium Technology Center S.A.S. |  | France |  | 100 | % |  | Consolidated
Constellium Finance S.A.S. |  | France |  | 100 | % |  | Consolidated
Constellium France III |  | France |  | 100 | % |  | Consolidated
Constellium France Holdco S.A.S. |  | France |  | 100 | % |  | Consolidated
Constellium International |  | France |  | 100 | % |  | Consolidated
Constellium Paris S.A.S. |  | France |  | 100 | % |  | Consolidated
Constellium Germany Holdco GmbH & Co. KG |  | Germany |  | 100 | % |  | Consolidated
Constellium Germany Verwaltungs GmbH |  | Germany |  | 100 | % |  | Consolidated
Constellium U.S. Holdings I, LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium US Intermediate Holdings LLC |  | U.S. |  | 100 | % |  | Consolidated
Constellium Switzerland AG |  | Switzerland |  | 100 | % |  | Consolidated
Constellium Treuhand UG |  | Germany |  | 100 | % |  | Consolidated
Engineered Products International S.A.S. |  | France |  | 100 | % |  | Consolidated
(A)AluInfra Services SA, the joint venture created with Novelis in July 2018, is consolidated as a joint operation and is immaterial to the Group Consolidated Financial Statements.

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- Definition The disclosure of interests in subsidiaries. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph 2 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_2_b_i&doctype=Standard -URIDate 2020-01-01 + Details
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