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Liabilities related to business combinations and to non-controlling interests - Summary of Maximum Amount of Contingent Consideration Payable and Firm Commitments to Buy Out Non-Controlling Interests (Details) - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure Of maximum amount of contingent consideration payable and firm commitments to buy out non-controlling interests [Line Items] |  |  |
Commitments relating to contingent consideration in connection with business combinations | € 72 | € 133 | € 604
Less than 1 year |  |  |
Disclosure Of maximum amount of contingent consideration payable and firm commitments to buy out non-controlling interests [Line Items] |  |  |
Commitments relating to contingent consideration in connection with business combinations | 72 |  |
From 1 to 3 years |  |  |
Disclosure Of maximum amount of contingent consideration payable and firm commitments to buy out non-controlling interests [Line Items] |  |  |
Commitments relating to contingent consideration in connection with business combinations | 0 |  |
From 3 to 5 years |  |  |
Disclosure Of maximum amount of contingent consideration payable and firm commitments to buy out non-controlling interests [Line Items] |  |  |
Commitments relating to contingent consideration in connection with business combinations | 0 |  |
More than 5 years |  |  |
Disclosure Of maximum amount of contingent consideration payable and firm commitments to buy out non-controlling interests [Line Items] |  |  |
Commitments relating to contingent consideration in connection with business combinations | € 0 |  |

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