XML 72 R35.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Subsidiaries and Operating Segments | 12 Months Ended
--- | ---
Dec. 31, 2017
Text block1 [abstract] |
Subsidiaries and Operating Segments | NOTE 29—SUBSIDIARIES AND OPERATING SEGMENTS The following Group’s affiliates are legal entities included in the consolidated financial statements of the Group at December 31, 2017.
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 |  |  | U.S. |  |  |  | 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 |
A&T |  |  |  |  |  |  |  |  |  |  |  |
Constellium Issoire |  |  | France |  |  |  | 100 | % |  |  | Full |
Constellium Montreuil Juigné |  |  | France |  |  |  | 100 | % |  |  | Full |
Constellium China |  |  | China |  |  |  | 100 | % |  |  | Full |
Constellium Italy S.p.A |  |  | Italy |  |  |  | 100 | % |  |  | Full |
Constellium Japan KK |  |  | Japan |  |  |  | 100 | % |  |  | Full |
Constellium Rolled Products Ravenswood, LLC |  |  | U.S. |  |  |  | 100 | % |  |  | Full |
Constellium Southeast Asia PTE LTD |  |  | Singapore |  |  |  | 100 | % |  |  | Full |
Constellium Ussel S.A.S. |  |  | France |  |  |  | 100 | % |  |  | Full |
P&ARP |  |  |  |  |  |  |  |  |  |  |  |
Constellium Deutschland GmbH |  |  | Germany |  |  |  | 100 | % |  |  | Full |
Constellium Rolled Products Singen GmbH KG |  |  | Germany |  |  |  | 100 | % |  |  | Full |
Constellium Property and Equipment Company, LLC |  |  | U.S. |  |  |  | 100 | % |  |  | Full |
Constellium Neuf Brisach |  |  | France |  |  |  | 100 | % |  |  | Full |
Wise Metals Group LLC |  |  | U.S. |  |  |  | 100 | % |  |  | Full |
Wise Alloys, LLC |  |  | U.S. |  |  |  | 100 | % |  |  | Full |
Wise Alloys Funding LLC |  |  | U.S. |  |  |  | 100 | % |  |  | Full |
Wise Alloys Funding II LLC |  |  | U.S. |  |  |  | 100 | % |  |  | Full |
Listerhill Total Maintenance Center LLC |  |  | U.S. |  |  |  | 100 | % |  |  | Full |
Constellium Metal Procurement LLC |  |  | U.S. |  |  |  | 100 | % |  |  | Full |
Constellium-UACJ ABS LLC |  |  | U.S. |  |  |  | 51 | % |  |  | Equity |
Rhenaroll |  |  | France |  |  |  | 50 | % |  |  | Equity |
Holdings & Corporate |  |  |  |  |  |  |  |  |  |  |  |
C-TEC Constellium Technology Center |  |  | 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 Holdco II B.V. |  |  | Netherlands |  |  |  | 100 | % |  |  | Full |
Constellium UK Limited |  |  | United Kingdom |  |  |  | 100 | % |  |  | Full |
Constellium U.S. Holdings I, LLC |  |  | U.S. |  |  |  | 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 |

X
- Definition Text Block [Abstract] + References No definition available. + Details
Name: | cstm_TextBlock1Abstract
Namespace Prefix: | cstm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 2017-01-01 -Paragraph 2 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_2_b_i&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration