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Inventories - Summary Reconciliation Of Provision For Inventories (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Reconciliation Of Provision For Inventories [Line Items]    
Provisions for inventories beginning balance € 288 € 205
Charge to income statement 116 153
Reduction/releases (97) (71)
Currency translations (26)  
Others [1] 3 1
Provisions for inventories ending balance € 284 € 288
[1] Others include the amount relating to the acquisition/disposal of businesses.