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Provisions - Legal provisions (Detail) - Legal proceedings provision [member] - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Provisions [Line Items]      
Other provisions at beginning of period € 55 € 26 € 50
Additional provisions, other provisions 72 69 17
Provision used, other provisions 45 36 29
Unused provision reversed, other provisions 6 6 11
Increase through adjustments arising from passage of time, other provisions 1 2 2
Increase (decrease) through net exchange differences, other provisions (5) 0 (3)
Other provisions at end of period € 72 € 55 € 26