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Non-current and current inventories (Details) - EUR (€) € in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Inventories [Line Items] |  |
Raw and auxiliary materials and consumables | € 889 | € 999
Materials and supplies | 1,451 | 1,566
Finished products and goods | 2,274 | 2,000
Certificates and emission rights | 37 | 56
Current inventories | € 4,651 | € 4,621

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