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REVENUE - Disaggregation of Revenue by Product Line (Details) - EUR (€) € in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disclosure of products and services [line items]
Total Revenue	€ 1,518	€ 1,031	€ 2,859	€ 2,468
Packaging rolled products
Disclosure of products and services [line items]
Total Revenue	648	456	1,167	980
Automotive rolled products
Disclosure of products and services [line items]
Total Revenue	213	88	421	281
Specialty and other thin-rolled products
Disclosure of products and services [line items]
Total Revenue	43	20	80	52
Aerospace rolled products
Disclosure of products and services [line items]
Total Revenue	100	142	187	365
Transportation, industry, defense and other rolled products
Disclosure of products and services [line items]
Total Revenue	174	105	321	231
Automotive extruded products
Disclosure of products and services [line items]
Total Revenue	176	96	377	295
Other extruded products
Disclosure of products and services [line items]
Total Revenue	€ 164	€ 124	€ 306	€ 264

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain 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 2020-01-01
-Paragraph 113
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_113_a&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2020-01-01
-Paragraph 114
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_114&doctype=Standard
-URIDate 2020-01-01

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- Details

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