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REVENUE - Disaggregation of Revenue by Product Line (Details) - EUR (€) € in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disclosure of products and services [line items]
Total Revenue	€ 1,031	€ 1,538	€ 2,468	€ 3,074
Packaging rolled products
Disclosure of products and services [line items]
Total Revenue	456	568	980	1,116
Automotive rolled products
Disclosure of products and services [line items]
Total Revenue	88	209	281	439
Specialty and other thin-rolled products
Disclosure of products and services [line items]
Total Revenue	20	42	52	90
Aerospace rolled products
Disclosure of products and services [line items]
Total Revenue	142	224	365	429
Transportation, Industry and other rolled products
Disclosure of products and services [line items]
Total Revenue	105	148	231	310
Automotive extruded products
Disclosure of products and services [line items]
Total Revenue	96	199	295	387
Other extruded products
Disclosure of products and services [line items]
Total Revenue	€ 124	€ 148	€ 264	€ 303

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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X

- 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 2019-01-01
-Paragraph 113
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2019-en-r&anchor=para_113_a&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2019-01-01
-Paragraph 114
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2019-en-r&anchor=para_114&doctype=Standard
-URIDate 2019-03-27

+ Details

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- Details

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- Details

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- Details

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- Details

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