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Inventories - Inventories (Detail) - EUR (€)
€ in Millions
Dec. 31, 2019
Dec. 31, 2018
Inventories [Abstract]    
Current raw materials and current production supplies € 901 € 876
Current work in progress 403 366
Current finished goods 1,469 1,432
Total current inventories € 2,773 € 2,674