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Provisions - Provisions for assurance-type product warranty (Detail) - Warranty 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 € 210 € 190 € 201
Additional provisions, other provisions 239 291 248
Provision used, other provisions 270 274 261
Increase (decrease) through net exchange differences, other provisions (12) 3 2
Other provisions at end of period € 167 € 210 € 190