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Provisions - Environmental provisions (Detail) - Other environment related 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 € 170 € 144 € 160
Additional provisions, other provisions 9 20 23
Provision used, other provisions 16 18 15
Unused provision reversed, other provisions 0 1 4
Increase (decrease) through change in discount rate, other provisions 37 9 (28)
Increase through adjustments arising from passage of time, other provisions 3 5 5
Increase (decrease) through net exchange differences, other provisions (19) 12 4
Other provisions at end of period € 183 € 170 € 144