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Inventory - compulsory stock	12 Months Ended
	Dec. 31, 2017
Disclosure Of Inventory Compulsory Stock [Abstract]
Disclosure of Inventory compulsory stock [text block]	17 Inventory — compulsory stock Compulsory inventories of  €1,283 million (€1,184 million at December 31, 2016) were primarily held by Italian subsidiaries for €1,267 million (€1,167 million at December 31, 2016) in accordance with minimum stock requirements for oil and petroleum products set forth by applicable laws.

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The disclosure of Inventory compulsory stock. According to legislative Decree of January 31, 2001 n.22 enacting Directive n. 1993/98/ec which regulates the obligation of Member States to keep a minimum amount of crude oil and/or petroleum products.

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