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OPERATING SEGMENT INFORMATION - Segment Revenue (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of operating segments [line items] |  |  |
Revenue | € 7,239 | € 8,120 | € 6,152
P&ARP |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 3,879 | 4,655 | 3,688
A&T |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 1,714 | 1,645 | 1,102
AS&I |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 1,627 | 1,820 | 1,362
H&C |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 19 | 0 | 0
Segment revenue |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 7,275 | 8,225 | 6,223
Segment revenue | P&ARP |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 3,898 | 4,664 | 3,698
Segment revenue | A&T |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 1,728 | 1,700 | 1,142
Segment revenue | AS&I |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 1,630 | 1,861 | 1,383
Segment revenue | H&C |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 19 | 0 | 0
Inter-segment elimination |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | (36) | (105) | (71)
Inter-segment elimination | P&ARP |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | (19) | (9) | (10)
Inter-segment elimination | A&T |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | (14) | (55) | (40)
Inter-segment elimination | AS&I |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | (3) | (41) | (21)
Inter-segment elimination | H&C |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | € 0 | € 0 | € 0

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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 + Details
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