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Intangible assets - Breakdown of exploration rights by type (Details) € in Millions | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 EUR (€)
--- | --- | --- | --- | ---
Intangible assets |  |  |  |
Intangible assets | € 6,379 | € 5,525 |  | € 4,799
Exploration rights |  |  |  |
Intangible assets |  |  |  |
Intangible assets | 663 | € 793 | $ 793 | € 913
Proved licence and leasehold property acquisition costs |  |  |  |
Intangible assets |  |  |  |
Intangible assets | 91 |  | 104 |
Unproved licence and leasehold property acquisition costs |  |  |  |
Intangible assets |  |  |  |
Intangible assets | € 572 |  | $ 689 |

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