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Inventories (Details) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
InventoriesLineItems [Line Items] |  |
Raw and auxiliary materials and consumables | € 2,565 | € 2,588
Products being processed and semi-finished products | 140 | 109
Work in progress | 1 | 2
Finished products and goods | 1,859 | 1,869
Certificates and emission rights | 56 | 69
Current inventories | 4,621 | 4,637
Crude oil, gas and petroleum products [member] |  |
InventoriesLineItems [Line Items] |  |
Raw and auxiliary materials and consumables | 785 | 550
Products being processed and semi-finished products | 133 | 99
Finished products and goods | 1,287 | 1,394
Current inventories | 2,205 | 2,043
Chemical products [member] |  |
InventoriesLineItems [Line Items] |  |
Raw and auxiliary materials and consumables | 140 | 135
Products being processed and semi-finished products | 7 | 9
Finished products and goods | 489 | 389
Current inventories | 636 | 533
Other [Member] |  |
InventoriesLineItems [Line Items] |  |
Raw and auxiliary materials and consumables | 1,640 | 1,903
Products being processed and semi-finished products |  | 1
Work in progress | 1 | 2
Finished products and goods | 83 | 86
Certificates and emission rights | 56 | 69
Current inventories | € 1,780 | € 2,061

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