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v3.19.1

Shareholders' equity (Details Textual) € / shares in Units, $ / shares in Units, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 13, 2017 USD ($) | May 12, 2016 $ / shares | Dec. 31, 2018 EUR (€) € / shares shares | Dec. 31, 2018 EUR (€) $ / shares shares | Dec. 31, 2017 EUR (€) € / shares shares | Dec. 31, 2016 € / shares
Share capital |  |  | € 4,005,000,000 | € 4,005,000,000 | € 4,005,000,000 |
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share | $ / shares |  | $ 0.42 |  | € 0.42 |  |
Capital redemption reserve |  |  | 581,000,000 | € 581,000,000 | 581,000,000 |
Other reserves |  |  | 1,672,000,000 | 1,672,000,000 | 1,889,000,000 |
Treasury shares |  |  | (581,000,000) | (581,000,000) | (581,000,000) |
Distributable Reserves |  |  | 46,000,000,000 | 46,000,000,000 |  |
Interim Dividends |  |  | € 1,513,000,000 | 1,513,000,000 | € 1,441,000,000 |
Interim Dividends Paid Per Share | € / shares |  |  | € 0.42 |  | € 0.40 | € 0.40
Dividends recognised as distributions to owners per share | € / shares |  |  |  |  | € 0.80 |
Retained earnings |  |  | € 36,702,000,000 | € 36,702,000,000 | € 35,966,000,000 |
Sale of treasury shares | $ | $ 11 |  |  |  |  |
Ordinary shares [member] |  |  |  |  |  |
Number of shares issued | shares |  |  | 3,634,185,330 | 3,634,185,330 |  |
Parent companys [Member] |  |  |  |  |  |
Share capital |  |  | € 4,005,358,876 | € 4,005,358,876 |  |
Eni SpA Reserve [Member] |  |  |  |  |  |
Other reserves |  |  | 63,000,000 | 63,000,000 |  |
Merger reserve [member] |  |  |  |  |  |
Other reserves |  |  | € 127,000,000 | € 127,000,000 |  |
Treasury shares [member] |  |  |  |  |  |
Number of shares issued | shares |  |  |  |  | 33,045,197 |

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