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TRADE RECEIVABLES AND OTHER - Narrative (Details) | 12 Months Ended |
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Dec. 31, 2023 EUR (€) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 EUR (€)
Disclosure of trade and other receivables [line items] |  |  |
Contract assets | € 16,000,000 |  | € 15,000,000
Total factored assets | 494,000,000 |  | 574,000,000
Factored assets derecognized | 356,000,000 |  | 368,000,000
Debt due factor | 1,000,000 |  | 6,000,000
Unbilled Tooling Costs |  |  |
Disclosure of trade and other receivables [line items] |  |  |
Contract assets | 7,000,000 |  | € 4,000,000
United States | Factoring of receivables | Muscle Shoals factoring facility |  |  |
Disclosure of trade and other receivables [line items] |  |  |
Factoring maximum capacity | $ |  | $ 175,000,000 |
United States | Factoring of receivables | Constellium automotive |  |  |
Disclosure of trade and other receivables [line items] |  |  |
Factoring maximum capacity | $ |  | $ 25,000,000 |
France | Factoring of receivables |  |  |
Disclosure of trade and other receivables [line items] |  |  |
Factoring maximum capacity | 250,000,000 |  |
France | Factoring Receivable, Recourse Line |  |  |
Disclosure of trade and other receivables [line items] |  |  |
Factoring maximum capacity | 20,000,000 |  |
Germany, Switzerland and Czech Republic | Factoring of receivables |  |  |
Disclosure of trade and other receivables [line items] |  |  |
Factoring maximum capacity | € 200,000,000 |  |

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- Definition The amount of non-current contract assets. [Refer: Contract assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 105 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_105&doctype=Standard -URIDate 2023-03-23 + Details
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- Details
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- Details
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- Details
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