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Non-current and current inventories - Additional information (Details) - EUR (€)
€ in Millions
Dec. 31, 2019
Dec. 31, 2018
Non-current and current inventories    
Materials and supplies € 1,477 € 1,451
Finished products and goods 2,284 2,274
Inventories pledged as security for liabilities 95 95
Inventories 4,734 4,651
Inventories held for compliance purposes 1,371 1,217
Accumulated impairment    
Non-current and current inventories    
Inventories (377) (578)
Gas and petroleum products    
Non-current and current inventories    
Finished products and goods 1,467 1,543
Chemical products    
Non-current and current inventories    
Finished products and goods 547 547
Oil and petroleum | Italy    
Non-current and current inventories    
Inventories held for compliance purposes 1,353 1,200
Exploration & Production    
Non-current and current inventories    
Materials and supplies € 1,359 € 1,334