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Inventories - Summary of Inventories (Detail) - EUR (€) € in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Classes of current inventories [abstract] |  |
Raw materials and consumables | € 1,523 | € 1,399
Finished goods and goods for resale | 3,223 | 3,053
Total inventories | 4,746 | 4,452
Provision for inventories | (284) | (288)
Total | € 4,462 | € 4,164

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