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Trade and other receivables (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Trade And Other Receivables [Abstract] |
Disclosure of detailed information about effects of application of IFRS 9 and IFRS 15 on Trade and Other Receivables [text block] | As of January 1, 2018, the effects of the application of IFRS 9 and IFRS 15 are the following:
(€ million) |  | Trade and other receivables
Amount as of 31 December 2017 |  |  | 15,421 |
Changes in accounting policies (IFRS 9) |  |  | (427 | )
Changes in accounting policies (IFRS 15) |  |  | (372 | )
Reclassification to other current asssets (IFRS 15) |  |  | (466 | )
Amount as of 1 January 2018 |  |  | 14,156 |
Disclosure of detailed information about other receivables [text block] | The following is the analysis of trade and other receivables:
(€ million) |  | December 31, 2018 |  |  | December 31, 2017
Trade receivables |  |  | 9,520 |  |  |  |  | 10,182 |
Receivables from divestments |  |  | 122 |  |  |  |  | 597 |
Receivables from operators in E&P activities |  |  | 3,024 |  |  |  |  | 3,369 |
Other receivables |  |  | 1,435 |  |  |  |  | 1,273 |
|  |  | 14,101 |  |  |  |  | 15,421 |
Disclosure of internal credit grades [text block] | Credit risk exposure and expected losses relating to trade and other receivables has been prepared on the basis of internal ratings as follows:
|  | Performing receivables |  |  | Defaulted |  |  | Eni gas e luce |  |  |
(€ million) |  | Low risk |  |  | Medium Risk |  |  | High Risk |  |  | receivables |  |  | customers |  | Total |
December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business customers |  |  | 2,454 |  |  |  | 3,585 |  |  |  | 1,152 |  |  |  |  | 1,350 |  |  |  |  |  |  |  | 8,541 |
National Oil Companies and public administrations |  |  | 1,292 |  |  |  | 157 |  |  |  | 672 |  |  |  |  | 2,217 |  |  |  |  |  |  |  | 4,338 |
Other counterparties |  |  | 1,494 |  |  |  | 77 |  |  |  | 156 |  |  |  |  | 271 |  |  |  | 2,374 |  |  |  | 4,372 |
Gross amount |  |  | 5,240 |  |  |  | 3,819 |  |  |  | 1,980 |  |  |  |  | 3,838 |  |  |  | 2,374 |  |  |  | 17,251 |
Allowance for doubtful accounts |  |  | (9 | ) |  |  | (3 | ) |  |  | (44 | ) |  |  |  | (2,237 | ) |  |  | (857 | ) |  |  | (3,150 | )
Net amount |  |  | 5,231 |  |  |  | 3,816 |  |  |  | 1,936 |  |  |  |  | 1,601 |  |  |  | 1,517 |  |  |  | 14,101 |
Expected loss (% net of counterpart risk mitigation factors) |  |  | 0.2 |  |  |  | 0.1 |  |  |  | 2.6 |  |  |  |  | 62.5 |  |  |  | 36.1 |  |  |  |  |
Disclosure of provision matrix [text block] | The exposure to credit risk and expected losses relating to customers of Eni gas e luce was assessed on the basis of a provision matrix as follows:
|  | Ageing
( € million) |  | Not-past due |  | from 0 to 3 months |  | from 3 to 6 months |  | from 6 to 12 months |  | over 12 months |  | Total
December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customers – Eni gas e luce: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
- Retail |  |  | 575 |  |  |  |  | 49 |  |  |  | 34 |  |  |  |  | 64 |  |  |  | 554 |  |  |  | 1,276 |
- Middle |  |  | 449 |  |  |  |  | 43 |  |  |  | 13 |  |  |  |  | 29 |  |  |  | 349 |  |  |  | 883 |
- Other |  |  | 207 |  |  |  |  | 2 |  |  |  | 1 |  |  |  |  | 2 |  |  |  | 3 |  |  |  | 215 |
Gross amount |  |  | 1,231 |  |  |  |  | 94 |  |  |  | 48 |  |  |  |  | 95 |  |  |  | 906 |  |  |  | 2,374 |
Allowance for doubtful accounts |  |  | (20 | ) |  |  |  | (18 | ) |  |  | (18 | ) |  |  |  | (56 | ) |  |  | (745 | ) |  |  | (857 | )
Net amount |  |  | 1,211 |  |  |  |  | 76 |  |  |  | 30 |  |  |  |  | 39 |  |  |  | 161 |  |  |  | 1,517 |
Expected loss (%) |  |  | 1.6 |  |  |  |  | 19.1 |  |  |  | 37.5 |  |  |  |  | 58.9 |  |  |  | 82.2 |  |  |  | 36.1 |
Disclosure of allowance for credit losses [text block] | Trade and other receivables are stated net of the valuation allowance for doubtful accounts which has been determined considering the counterparty risk mitigation factors amounting to € 3,072 million:
(€ million) |  | Trade and other receivables
Carrying amount at December 31, 2017 |  |  | 2,639 |
Changes in accounting policies (IFRS 9) |  |  | 427 |
Carrying amount at January 1, 2018 |  |  | 3,066 |
Additions on trade and other performing receivables |  |  | 126 |
Additions on trade and other defaulted receivables |  |  | 372 |
Deductions on trade and other performing receivables |  |  | (189 | )
Deductions on trade and other defaulted receivables |  |  | (532 | )
Other changes |  |  | 307 |
Carrying amount at December 31, 2018 |  |  | 3,150 |
Carrying amount at December 31, 2016 |  |  | 2,303 |
Additions |  |  | 927 |
Deductions |  |  | (454 | )
Other changes |  |  | (137 | )
Carrying amount at December 31, 2017 |  |  | 2,639 |
Disclosure of impairment loss on financial assets | Net (impairment losses) reversals of trade and other receivables are disclosed as follows:
(€ million) |  | 2018
Net (impairment losses) reversals of trade and other receivables |  |  |  |  |
New or increased provisions |  |  | (498 | ) |
Credit losses |  |  | (37 | ) |
Reversal of unutilized provisions |  |  | 120 |  |
|  |  | (415 | ) |
Disclosure of detailed information about ageing of trade and other receivable |
|  | December 31, 2017
(€ million) |  | Trade receivables |  | Other receivables
Neither impaired nor past due |  |  | 8,800 |  |  |  | 4,604 |
Impaired (net of the valuation for doubtful accounts) |  |  | 567 |  |  |  | 31 |
Not impaired and past due: |  |  |  |  |  |  |  |
- within 90 days |  |  | 478 |  |  |  | 21 |
- from 3 to 6 months |  |  | 46 |  |  |  | 9 |
- from 6 to 12 months |  |  | 147 |  |  |  | 202 |
- over 12 months |  |  | 144 |  |  |  | 372 |
|  |  | 815 |  |  |  | 604 |
|  |  | 10,182 |  |  |  | 5,239 |

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