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Provisions for contingencies (Tables) | 12 Months Ended
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Dec. 31, 2018
Provisions for contingencies [Member] |
Disclosure of other Provisions Contingent Liabilities and Contingent Assets Explanatory [Line Items] |
Disclosure of other provisions [text block] |
(€ million) |  | Provision for site restoration, abandonment and social projects |  | Environmental provision |  | Provision for litigations |  | Provision for taxes |  | Loss adjustments and actuarial provisions for Eni’s insurance companies |  | Provision for losses on investments |  | Provision for OIL insurance cover |  | Provision for redundancy incentives |  | Provision for disposal and restructuring |  | Provision for onerous contracts |  | Other(*) |  | Total
Carrying amount at December 31, 2017 |  |  | 8,126 |  |  |  | 2,653 |  |  |  | 1,107 |  |  |  | 527 |  |  |  | 205 |  |  |  | 182 |  |  |  | 76 |  |  |  | 140 |  |  |  | 65 |  |  |  | 60 |  |  |  | 306 |  |  |  | 13,447 |
New or increased provisions |  |  |  |  |  |  | 299 |  |  |  | 148 |  |  |  | 73 |  |  |  | 493 |  |  |  | 48 |  |  |  | 51 |  |  |  | 9 |  |  |  | 19 |  |  |  |  |  |  |  | 223 |  |  |  | 1,363 |
Initial recognition and changes in estimates |  |  | (502 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (502 | )
Accretion discount |  |  | 259 |  |  |  | (12 | ) |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 249 |
Reversal of utilized provisions |  |  | (190 | ) |  |  | (287 | ) |  |  | (214 | ) |  |  | (118 | ) |  |  | (481 | ) |  |  |  |  |  |  |  |  |  |  | (17 | ) |  |  | (14 | ) |  |  | (22 | ) |  |  | (100 | ) |  |  | (1,443 | )
Reversal of unutilized provisions |  |  |  |  |  |  | (33 | ) |  |  | (289 | ) |  |  | (31 | ) |  |  |  |  |  |  | (1 | ) |  |  |  |  |  |  | (17 | ) |  |  |  |  |  |  |  |  |  |  | (18 | ) |  |  | (389 | )
Changes in the scope of consolidation |  |  | (1,024 | ) |  |  | (11 | ) |  |  | (1 | ) |  |  | (8 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5 | ) |  |  |  |  |  |  |  |  |  |  | (2 | ) |  |  | (1,051 | )
Currency translation differences |  |  | 153 |  |  |  |  |  |  |  | 34 |  |  |  | 17 |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  |  | 210 |
Other changes |  |  | (45 | ) |  |  | (14 | ) |  |  | 37 |  |  |  | (20 | ) |  |  | 110 |  |  |  | (27 | ) |  |  | 3 |  |  |  | (2 | ) |  |  | (4 | ) |  |  |  |  |  |  | (36 | ) |  |  | 2 |
Carrying amount at December 31, 2018 |  |  | 6,777 |  |  |  | 2,595 |  |  |  | 824 |  |  |  | 440 |  |  |  | 327 |  |  |  | 204 |  |  |  | 130 |  |  |  | 108 |  |  |  | 66 |  |  |  | 38 |  |  |  | 377 |  |  |  | 11,886 |
(*) Each individual amount included herein was lower than €50 million.

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