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Current and non-current inventories - Additional information (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Current and non-current inventories    
Materials and supplies € 1,515 € 1,611
Finished products and goods 4,962 3,452
Inventories 7,709 6,072
Inventories held for compliance purposes 1,786 1,053
Accumulated impairment    
Current and non-current inventories    
Inventories (672) (570)
Natural gas and oil products    
Current and non-current inventories    
Finished products and goods 3,818 2,414
Inventories pledged as security for liabilities 750  
Chemical products    
Current and non-current inventories    
Finished products and goods 790 626
Oil and petroleum | Italy    
Current and non-current inventories    
Inventories held for compliance purposes 1,764 1,032
Exploration & Production    
Current and non-current inventories    
Materials and supplies € 1,387 € 1,481