XML 114 R72.htm IDEA: XBRL DOCUMENT
v3.19.1

Acquisition of Constellium-Bowling Green (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Text block [abstract] |
Summary of Preliminary Goodwill Arising as a Result of Preliminary Allocation of Purchase Price to Assets Acquired and Liabilities Assumed | The following table reflects the goodwill arising as a result of the preliminary allocation of purchase price to the Bowling Green assets acquired and liabilities assumed as of January 10, 2019:
(in millions of Euros) |  | Estimated Fair Value |
Cash and cash equivalents |  |  | 8 |
Trade receivables and other |  |  | 49 |
Inventories |  |  | 74 |
Property, plant and equipment |  |  | 165 |
Trade payables and other |  |  | (45 | )
Borrowings |  |  | (75 | )
Net asset acquired at fair value |  |  | 176 |
Preliminary Goodwill |  |  | 22 |
Total Consideration |  |  | 198 |

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

X
- Definition The disclosure of detailed information about business combinations. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2018-01-01 -Section Disclosures application of paragraphs 59 and 61 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=F4301424&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
Name: | ifrs-full_DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration