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Property, plant and equipment - Summary of Acquisitions and Capitalized Interest by Operating Segment (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of acquisitions of property plant and equipment by operating segments [line items] |  |  |
Acquisitions | € 1,748 | € 1,504 | € 1,310
Capitalized interest | 17 | 14 | 11
Pharmaceuticals |  |  |
Disclosure of acquisitions of property plant and equipment by operating segments [line items] |  |  |
Acquisitions | 1,049 | 1,007 | 831
Pharmaceuticals | Industrial facilities |  |  |
Disclosure of acquisitions of property plant and equipment by operating segments [line items] |  |  |
Acquisitions | 597 | 534 | 634
Pharmaceuticals | Research sites |  |  |
Disclosure of acquisitions of property plant and equipment by operating segments [line items] |  |  |
Acquisitions | 153 | 277 | 152
Pharmaceuticals | Other |  |  |
Disclosure of acquisitions of property plant and equipment by operating segments [line items] |  |  |
Acquisitions | 299 | 199 | 45
Vaccines |  |  |
Disclosure of acquisitions of property plant and equipment by operating segments [line items] |  |  |
Acquisitions | 629 | 421 | 384
Consumer Healthcare |  |  |
Disclosure of acquisitions of property plant and equipment by operating segments [line items] |  |  |
Acquisitions | € 70 | € 73 | € 95

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