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Inventories - Inventories (Detail) - EUR (€)
€ in Millions
Dec. 31, 2020
Dec. 31, 2019
Inventories [Abstract]    
Current raw materials and current production supplies € 992 € 901
Current work in progress 537 403
Current finished goods 1,464 1,469
Current inventories € 2,993 € 2,773