XML 54 R47.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Financial Instruments (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2018
Text block1 [abstract] |
Summary of Financial Assets and Liabilities by Categories | 18.1 Financial assets and liabilities by categories
|  | At June 30, 2018 |  |  | At December 31, 2017 |
(in millions of Euros) |  | Notes |  | At amortized cost |  |  | At Fair Value through Profit and loss |  |  | At Fair Value through OCI |  |  | Total |  |  | Loan and receivables |  |  | At Fair Value through Profit and loss |  |  | At Fair Value through OCI |  |  | Total |
Cash and cash equivalents |  | 10 |  |  | 166 |  |  |  | — |  |  |  | — |  |  |  | 166 |  |  |  | 269 |  |  |  | — |  |  |  | — |  |  |  | 269 |
Trade receivables |  | 11 |  |  | — |  |  |  | — |  |  |  | 526 |  |  |  | 526 |  |  |  | 306 |  |  |  | — |  |  |  | — |  |  |  | 306 |
Finance lease receivables |  | 11 |  |  | 9 |  |  |  | — |  |  |  | — |  |  |  | 9 |  |  |  | 12 |  |  |  | — |  |  |  | — |  |  |  | 12 |
Other financial assets |  |  |  |  | 76 |  |  |  | 37 |  |  |  | 7 |  |  |  | 120 |  |  |  | 83 |  |  |  | 77 |  |  |  | 19 |  |  |  | 179 |
Total financial assets |  |  |  |  | 251 |  |  |  | 37 |  |  |  | 533 |  |  |  | 821 |  |  |  | 670 |  |  |  | 77 |  |  |  | 19 |  |  |  | 766 |
|  | At June 30, 2018 |  |  | At December 31, 2017 |
(in millions of Euros) |  | Notes |  | At amortized cost |  |  | At Fair Value through Profit and loss |  |  | At Fair Value through OCI |  |  | Total |  |  | At amortized cost |  |  | At Fair Value through Profit and loss |  |  | At Fair Value through OCI |  |  | Total |
Trade payables and fixed assets payables |  | 16 |  |  | 863 |  |  |  | — |  |  |  | — |  |  |  | 863 |  |  |  | 744 |  |  |  | — |  |  |  | — |  |  |  | 744 |
Borrowings |  | 17 |  |  | 2,184 |  |  |  | — |  |  |  | — |  |  |  | 2,184 |  |  |  | 2,127 |  |  |  | — |  |  |  | — |  |  |  | 2,127 |
Other financial liabilities |  |  |  |  | — |  |  |  | 56 |  |  |  | 1 |  |  |  | 57 |  |  |  | — |  |  |  | 66 |  |  |  | — |  |  |  | 66 |
Total financial liabilities |  |  |  |  | 3,047 |  |  |  | 56 |  |  |  | 1 |  |  |  | 3,104 |  |  |  | 2,871 |  |  |  | 66 |  |  |  | — |  |  |  | 2,937 |
Summary of Other Financial Assets and Other Financial Liabilities Positions | The table below details other financial assets and other financial liabilities positions:
|  | At June 30, 2018 |  |  | At December 31, 2017 |
(in millions of Euros) |  | Non-current |  |  | Current |  |  | Total |  |  | Non-current |  |  | Current |  |  | Total |
Derivatives |  |  | 11 |  |  |  | 33 |  |  |  | 44 |  |  |  | 29 |  |  |  | 67 |  |  |  | 96 |
Aluminium and premium future contract |  |  | 3 |  |  |  | 13 |  |  |  | 16 |  |  |  | 6 |  |  |  | 39 |  |  |  | 45 |
Energy future contract |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Other future contract |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | 1 |
Currency commercial contracts |  |  | 7 |  |  |  | 18 |  |  |  | 25 |  |  |  | 21 |  |  |  | 20 |  |  |  | 41 |
Currency net debt derivatives |  |  | 1 |  |  |  | 2 |  |  |  | 3 |  |  |  | 2 |  |  |  | 7 |  |  |  | 9 |
Loans (A) |  |  | 74 |  |  |  | 2 |  |  |  | 76 |  |  |  | 81 |  |  |  | 2 |  |  |  | 83 |
Other financial assets |  |  | 85 |  |  |  | 35 |  |  |  | 120 |  |  |  | 110 |  |  |  | 69 |  |  |  | 179 |
Derivatives |  |  | 29 |  |  |  | 28 |  |  |  | 57 |  |  |  | 43 |  |  |  | 23 |  |  |  | 66 |
Aluminium and premium future contract |  |  | 3 |  |  |  | 12 |  |  |  | 15 |  |  |  | — |  |  |  | 6 |  |  |  | 6 |
Energy future contract |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Other future contract |  |  | 3 |  |  |  | 2 |  |  |  | 5 |  |  |  | — |  |  |  | 1 |  |  |  | 1 |
Currency commercial contracts |  |  | 4 |  |  |  | 10 |  |  |  | 14 |  |  |  | 6 |  |  |  | 12 |  |  |  | 18 |
Currency net debt derivatives |  |  | 19 |  |  |  | 4 |  |  |  | 23 |  |  |  | 37 |  |  |  | 4 |  |  |  | 41 |
Other financial liabilities |  |  | 29 |  |  |  | 28 |  |  |  | 57 |  |  |  | 43 |  |  |  | 23 |  |  |  | 66 |
(A) | Corresponds to a loan facility to Constellium-UACJ ABS LLC (See NOTE 15 – Investments accounted for under the equity method).
Summary of Derivatives Measured at Fair Value | The following table provides an analysis of derivatives measured at fair value, grouped into levels based on the degree to which the fair value is observable:
| • |  | Level 1 valuation is based on quoted price (unadjusted) in active markets for identical financial instruments, it includes aluminium futures that are traded on the LME;
| • |  | Level 2 valuation is based on inputs other than quoted prices included within Level 1 that are observable for the assets or liabilities, either directly (i.e. prices) or indirectly (i.e. derived from prices), it includes foreign exchange derivatives;
| • |  | Level 3 valuation is based on inputs for the asset or liability that are not based on observable market data (unobservable inputs).
|  | At June 30, 2018 |  |  | At December 31, 2017 |
(in millions of Euros) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Other financial assets - derivatives |  |  | 14 |  |  |  | 30 |  |  |  | — |  |  |  | 44 |  |  |  | 46 |  |  |  | 50 |  |  |  | — |  |  |  | 96 |
Other financial liabilities - derivatives |  |  | 18 |  |  |  | 39 |  |  |  | — |  |  |  | 57 |  |  |  | 6 |  |  |  | 60 |  |  |  | — |  |  |  | 66 |

X
- Definition The entire disclosure of financial derivative instrument assets and liabilities. + References No definition available. + Details
Name: | cstm_DisclosureOfFinancialDerivativeInstrumentAssetsAndLiabilitiesExplanatory
Namespace Prefix: | cstm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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 the fair value measurement of assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfFairValueMeasurementOfAssetsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of financial instruments measured at fair value through profit or loss. [Refer: At fair value [member]; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration