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REVENUE - Disaggregation of Revenue by Destination of Shipment (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | € 6,152 | € 4,883 | € 5,907
Germany |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | 1,481 | 1,014 | 1,260
France |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | 466 | 362 | 563
United Kingdom |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | 179 | 192 | 194
Switzerland |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | 63 | 52 | 68
Other Europe |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | 1,233 | 923 | 1,078
Total Europe |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | 3,422 | 2,543 | 3,163
United States |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | 2,335 | 1,941 | 2,175
Asia and Other Pacific |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | 171 | 211 | 277
All Other |  |  |
Disclosure of geographical areas [line items] |  |  |
Total Revenue by product line | € 224 | € 188 | € 292

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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 2021-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_113_a&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2021-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_114&doctype=Standard -URIDate 2021-03-24 + Details
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