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v3.26.1

Litigation and arbitration proceedings (Details) | 6 Months Ended |  |  |  |
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Jun. 30, 2026 case | Aug. 31, 2025 aspects defendant | Jun. 30, 2025 proceeding | Dec. 31, 2024 proceeding | Dec. 31, 2023 proceeding
Talc product litigation in the US |  |  |  |  |
Disclosure of Legal and Arbitral Proceedings [Line Items] |  |  |  |  |
Number of class action lawsuits |  |  | 1,430 |  |
Dupixent product litigation in the US |  |  |  |  |
Disclosure of Legal and Arbitral Proceedings [Line Items] |  |  |  |  |
Number of product liability cases | case | 30 |  |  |  |
Number of cases filed in New Jersey court | case | 8 |  |  |  |
University of Washington and Harborview medical center | 340B Drug Pricing Program in the US |  |  |  |  |
Disclosure of Legal and Arbitral Proceedings [Line Items] |  |  |  |  |
Number of class action lawsuits |  |  |  |  | 1
Hudson Headwaters Health Network | 340B Drug Pricing Program in the US |  |  |  |  |
Disclosure of Legal and Arbitral Proceedings [Line Items] |  |  |  |  |
Number of class action lawsuits |  |  |  | 1 |
Mosaic Health in the US | 340B Drug Pricing Program in the US |  |  |  |  |
Disclosure of Legal and Arbitral Proceedings [Line Items] |  |  |  |  |
Number of other manufacturers in legal proceeding | defendant |  | 3 |  |  |
Number of legal decision aspects challenged | aspects |  | 2 |  |  |

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