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Expenses by Nature (Tables) | 12 Months Ended
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Dec. 31, 2018
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Detailed Information about Expenses by Nature |
(in millions of Euros) |  | Year ended December 31, 2018 |  |  | Year ended December 31, 2017 |  |  | Year ended December 31, 2016 |
Raw materials and consumables used |  |  | (3,561 | ) |  |  | (3,197 | ) |  |  | (2,792 | )
Employee benefit expenses |  |  | (927 | ) |  |  | (907 | ) |  |  | (876 | )
Energy costs |  |  | (140 | ) |  |  | (138 | ) |  |  | (140 | )
Sub-contractors |  |  | (92 | ) |  |  | (99 | ) |  |  | (108 | )
Freight out costs |  |  | (143 | ) |  |  | (124 | ) |  |  | (128 | )
Professional fees |  |  | (74 | ) |  |  | (77 | ) |  |  | (85 | )
Operating lease expenses |  |  | (31 | ) |  |  | (27 | ) |  |  | (27 | )
Depreciation and amortization |  |  | (197 | ) |  |  | (171 | ) |  |  | (155 | )
Other operating expenses |  |  | (271 | ) |  |  | (229 | ) |  |  | (186 | )
Other gains / (losses)—net |  |  | 154 |  |  |  | 70 |  |  |  | 21 |
Total operating expenses |  |  | (5,282 | ) |  |  | (4,899 | ) |  |  | (4,476 | )

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