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REVENUE - Disaggregation of Revenue by Destination of Shipment (Details) - EUR (€) € in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disclosure of geographical areas [line items]
Total Revenue	€ 1,795	€ 1,950	€ 3,526	€ 3,906
Total Europe
Disclosure of geographical areas [line items]
Total Revenue	1,008	1,100	1,991	2,227
Germany
Disclosure of geographical areas [line items]
Total Revenue	372	447	734	926
France
Disclosure of geographical areas [line items]
Total Revenue	163	178	337	360
United Kingdom
Disclosure of geographical areas [line items]
Total Revenue	74	67	133	128
Switzerland
Disclosure of geographical areas [line items]
Total Revenue	20	15	36	40
Spain
Disclosure of geographical areas [line items]
Total Revenue	80	85	171	166
Czech Republic
Disclosure of geographical areas [line items]
Total Revenue	52	67	106	124
Other Europe
Disclosure of geographical areas [line items]
Total Revenue	247	241	474	483
United States
Disclosure of geographical areas [line items]
Total Revenue	597	716	1,185	1,389
Asia and Other Pacific
Disclosure of geographical areas [line items]
Total Revenue	70	61	138	122
All Other
Disclosure of geographical areas [line items]
Total Revenue	€ 120	€ 73	€ 212	€ 168

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 2023-01-01
-Paragraph 114
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_114&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2023-01-01
-Paragraph 113
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_113_a&doctype=Standard
-URIDate 2023-03-23

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