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REVENUE - Disaggregation of Revenue by Product Line (Details) - EUR (€) € in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disclosure of products and services [line items]
Total Revenue	€ 1,950	€ 2,275	€ 3,906	€ 4,254
Packaging rolled products
Disclosure of products and services [line items]
Total Revenue	699	985	1,384	1,837
Automotive rolled products
Disclosure of products and services [line items]
Total Revenue	312	308	616	571
Specialty and other thin-rolled products
Disclosure of products and services [line items]
Total Revenue	34	54	70	104
Aerospace rolled products
Disclosure of products and services [line items]
Total Revenue	271	183	524	326
Transportation, industry, defense and other rolled products
Disclosure of products and services [line items]
Total Revenue	190	257	385	487
Automotive extruded products
Disclosure of products and services [line items]
Total Revenue	251	247	511	473
Other extruded products
Disclosure of products and services [line items]
Total Revenue	€ 193	€ 241	€ 416	€ 456

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2022-03-24
-Paragraph 114
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2022-en-r&anchor=para_114&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2022-03-24
-Paragraph 113
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2022-en-r&anchor=para_113_a&doctype=Standard
-URIDate 2022-03-24

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- Details

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