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Off balance sheet commitments - Summary of Off Balance Sheet Commitments Relating to Operating Activities (Details) - EUR (€) € in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure Of Off Balance Sheet Commitments [Line Items] |  |
Leases with a term of less than 12 months, low value asset leases and lease contracts committed but not yet commenced | € 38 | € 109
Irrevocable purchase commitments given | 10,921 |
Irrevocable purchase commitments received | (1,025) |
Research and development license agreements - commitments related to R&D and other commitments | 259 | 536
Research and development license agreements - contingent milestone payments in connection with development programs in progress | 2,919 | 2,892
Total - net contributions given | 13,112 |
Less than 1 year |  |
Disclosure Of Off Balance Sheet Commitments [Line Items] |  |
Leases with a term of less than 12 months, low value asset leases and lease contracts committed but not yet commenced | 26 |
Irrevocable purchase commitments given | 5,957 |
Irrevocable purchase commitments received | (482) |
Research and development license agreements - commitments related to R&D and other commitments | 197 |
Research and development license agreements - contingent milestone payments in connection with development programs in progress | 203 |
Total - net contributions given | 5,901 |
From 1 to 3 years |  |
Disclosure Of Off Balance Sheet Commitments [Line Items] |  |
Leases with a term of less than 12 months, low value asset leases and lease contracts committed but not yet commenced | 4 |
Irrevocable purchase commitments given | 2,922 |
Irrevocable purchase commitments received | (335) |
Research and development license agreements - commitments related to R&D and other commitments | 39 |
Research and development license agreements - contingent milestone payments in connection with development programs in progress | 875 |
Total - net contributions given | 3,505 |
From 3 to 5 years |  |
Disclosure Of Off Balance Sheet Commitments [Line Items] |  |
Leases with a term of less than 12 months, low value asset leases and lease contracts committed but not yet commenced | 3 |
Irrevocable purchase commitments given | 1,062 |
Irrevocable purchase commitments received | (86) |
Research and development license agreements - commitments related to R&D and other commitments | 10 |
Research and development license agreements - contingent milestone payments in connection with development programs in progress | 889 |
Total - net contributions given | 1,878 |
More than 5 years |  |
Disclosure Of Off Balance Sheet Commitments [Line Items] |  |
Leases with a term of less than 12 months, low value asset leases and lease contracts committed but not yet commenced | 5 |
Irrevocable purchase commitments given | 980 |
Irrevocable purchase commitments received | (122) |
Research and development license agreements - commitments related to R&D and other commitments | 13 |
Research and development license agreements - contingent milestone payments in connection with development programs in progress | 952 |
Total - net contributions given | 1,828 |
Suppliers |  |
Disclosure Of Off Balance Sheet Commitments [Line Items] |  |
Irrevocable purchase commitments given |  | 8,901
Irrevocable purchase commitments received |  | € (1,124)
Joint ventures |  |
Disclosure Of Off Balance Sheet Commitments [Line Items] |  |
Irrevocable purchase commitments given | € 871 |

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