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Consolidated shareholders’ equity - Summary of Characteristics of Employee Share Ownership Plans Awarded (Details) - € / shares | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Jan. 31, 2024 | Feb. 02, 2023 | Feb. 03, 2022
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |
Subscription price (as a percent) |  | 80.00% | 80.00% | 80.00% |  |  |
Number of trading days preceding plan approval |  | 20 days | 20 days | 20 days |  |  |
Employees share ownership plan |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |
Subscription price (in euros per share) | [1] |  |  |  | € 72.87 | € 79.58 | € 80.21
Number of shares subscribed (in shares) |  |  |  |  | 2,124,445 | 2,009,306 | 1,909,008
Number of shares issued immediately as employer's contribution (in shares) |  |  |  |  | 119,951 | 119,417 | 118,049
[1] | (a)Subscription price representing 80% of the average of the opening quoted market prices of Sanofi shares during the 20 trading days preceding May 30, 2024, May 31, 2023 and June 6, 2022, respectively

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