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Intangible assets - Breakdown of exploration rights by type (Details) - EUR (€) € in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Intangible assets |  |  |
Intangible assets | € 4,799 | € 2,936 | € 3,059
Exploration rights |  |  |
Intangible assets |  |  |
Intangible assets | 913 | 888 | € 1,031
Proved licence and leasehold property acquisition costs |  |  |
Intangible assets |  |  |
Intangible assets | 236 | 225 |
Unproved licence and leasehold property acquisition costs |  |  |
Intangible assets |  |  |
Intangible assets | € 677 | 653 |
Other mineral interests |  |  |
Intangible assets |  |  |
Intangible assets |  | € 10 |

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