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INVENTORIES (Tables) | 12 Months Ended
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Dec. 31, 2020
Subclassifications of assets, liabilities and equities [abstract] |
Schedule of Inventories |
|  | At December 31,
(in millions of Euros) |  | 2020 |  | 2019
Finished goods |  | 149 |  |  | 203 |
Work in progress |  | 280 |  |  | 321 |
Raw materials |  | 118 |  |  | 106 |
Stores and supplies |  | 80 |  |  | 74 |
Inventories write down |  | (45) |  |  | (34) |
Total inventories |  | 582 |  |  | 670 |

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