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Other assets (Details Textual) - EUR (€)
€ in Millions
Jan. 02, 2018
Dec. 31, 2018
Dec. 31, 2017
Adjustments for decrease (increase) in other assets € 322    
Current tax assets, non-current   € 422 € 507
Prepayments   26 119
Non Current Receivables From Others   35 44
Trade and other non-current receivables   € 9 € 118
Exploration Production Segment [Member]      
Adjustments for decrease (increase) in other assets € 466