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Financial assets and liabilities measured at fair value (Tables) | 12 Months Ended
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Dec. 31, 2023
Fair Value Measurement [Abstract] |
Summary of Assets and Liabilities Measured at Fair Value | The table below shows the balance sheet amounts of assets and liabilities measured at fair value.
|  | 2023 | 2022 | 2021
|  | Level in the fair value hierarchy | Level in the fair value hierarchy | Level in the fair value hierarchy
(€ million) | Note | Level 1 | Level 2 | Level 3 | Level 1 | Level 2 | Level 3 | Level 1 | Level 2 | Level 3
Financial assets measured at fair value |  |  |  |  |  |  |  |  |  |
Quoted equity investments | D.7.1. | 470 |  | — |  | — |  | 387 |  | — |  | — |  | 396 |  | — |  | — |
Unquoted equity investments | D.7.1. | — |  | — |  | 618 |  | — |  | — |  | 549 |  | — |  | — |  | 427 |
Quoted debt securities | D.7.2. | 346 |  | — |  | — |  | 329 |  | — |  | — |  | 447 |  | — |  | — |
Unquoted debt securities not meeting the definition of equity instruments | D.7.3. | — |  | — |  | 132 |  | — |  | — |  | 115 |  | — |  | — |  | 78 |
Contingent consideration relating to divestments | D.7.3. | — |  | — |  | 214 |  | — |  | — |  | 303 |  | — |  | — |  | 378 |
Financial assets held to meet obligations under deferred compensation plans | D.7.3. & D.11. | 572 |  | — |  | — |  | 512 |  | — |  | — |  | 549 |  | — |  | — |
Non-current derivatives | D.7. | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 3 |  | — |
Current derivatives | D.11. | — |  | 201 |  | — |  | — |  | 206 |  | — |  | — |  | 295 |  | — |
Mutual fund investments | D.13. | 5,349 |  | — |  | — |  | 9,537 |  | — |  | — |  | 5,057 |  | — |  | — |
Total financial assets measured at fair value |  | 6,737 |  | 201 |  | 964 |  | 10,765 |  | 206 |  | 967 |  | 6,449 |  | 298 |  | 883 |
Financial liabilities measured at fair value |  |  |  |  |  |  |  |  |  |
Bayer contingent purchase consideration arising from the acquisition of Genzyme | D.18. | — |  | — |  | — |  | — |  | — |  | 26 |  | — |  | — |  | 59 |
MSD contingent consideration (European vaccines business) | D.18. | — |  | — |  | 127 |  | — |  | — |  | 204 |  | — |  | — |  | 269 |
Shire contingent consideration arising from the acquisition of Translate Bio | D.18. | — |  | — |  | 441 |  | — |  | — |  | 380 |  | — |  | — |  | 354 |
Contingent consideration arising from acquisition of Amunix | D.18. | — |  | — |  | 137 |  | — |  | — |  | 165 |  | — |  | — |  | — |
Other contingent consideration arising from business combinations and acquisitions | D.18. | — |  | — |  | 4 |  | — |  | — |  | 4 |  | — |  | — |  | 32 |
Non-current derivatives | D.20. | — |  | 164 |  | — |  | — |  | 232 |  | — |  | — |  | 6 |  | — |
Current derivatives | D.19.5 | — |  | 127 |  | — |  | — |  | 94 |  | — |  | — |  | 79 |  | — |
Total financial liabilities measured at fair value |  | — |  | 291 |  | 709 |  | — |  | 326 |  | 779 |  | — |  | 85 |  | 714 |

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- Definition Disclosure of fair value of financial assets and liabilities explanatory. + References No definition available. + Details
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- Definition Fair Value Measurement [Abstract] + References No definition available. + Details
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