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Consolidated shareholders’ equity - Additional Information (Details) - EUR (€) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of classes of share capital [line items] |  |  |
Share capital | € 2,529,599,938 |  |
Number of shares (in shares) | 1,264,799,969 |  |
Par value per share (in euros per share) | € 2 |  |
Hedges of net investments in foreign operations | € (574,000,000) | € (580,000,000) | € (317,000,000)
Number of stock option not taken for computing diluted earning per share (in shares) |  |  | 600,000
May 25, 2023 |  |  |
Disclosure of classes of share capital [line items] |  |  |
Period of share repurchase program | 18 months |  |
May 3, 2022 |  |  |
Disclosure of classes of share capital [line items] |  |  |
Period of share repurchase program |  | 18 months |
April 30, 2021 |  |  |
Disclosure of classes of share capital [line items] |  |  |
Period of share repurchase program |  |  | 18 months
Stock subscription option plan |  |  |
Disclosure of classes of share capital [line items] |  |  |
Increase in shareholders equity due to exercise of stock purchase option | € 107,000,000 |  |
Number of shares issued by exercice of each option (in shares) | 1 |  |

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