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Provisions - Environmental provisions (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Provisions [Line Items]    
Provisions, at the start of the period € 2,313  
Provisions, at the end of the period 2,115 € 2,313
Other environment related provision [member]    
Provisions [Line Items]    
Provisions, at the start of the period 124 183
Additional provisions, other provisions 15 18
Provision used, other provisions 17 15
Unused provision reversed, other provisions 2 64
Increase (decrease) through change in discount rate, other provisions (27) (10)
Increase through adjustments arising from passage of time, other provisions 4 3
Increase (decrease) through net exchange differences, other provisions 7 9
Provisions, at the end of the period € 104 € 124