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Current and non-current inventories - Additional information (Details) - EUR (€) € in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Current and non-current inventories |  |
Materials and supplies | € 1,611 | € 1,580
Finished products and goods | 3,452 | 1,603
Inventories | 6,072 | 3,893
Inventories held for compliance purposes | 1,053 | 995
Accumulated impairment |  |
Current and non-current inventories |  |
Inventories | (570) | (348)
Natural gas and oil products |  |
Current and non-current inventories |  |
Finished products and goods | 2,414 | 874
Inventories pledged as security for liabilities | 269 |
Chemical products |  |
Current and non-current inventories |  |
Finished products and goods | 626 | 443
Oil and petroleum | Italy |  |
Current and non-current inventories |  |
Inventories held for compliance purposes | 1,032 | 977
Exploration & Production |  |
Current and non-current inventories |  |
Materials and supplies | € 1,481 | € 1,463

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