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Provisions - Other provisions (Detail) - Miscellaneous other provisions [member] - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Provisions [Line Items]    
Other provisions at beginning of period € 372  
Additional provisions, other provisions 89 € 161
Provision used, other provisions 87 109
Unused provision reversed, other provisions 29 49
Increase through adjustments arising from passage of time, other provisions (5) (1)
Increase (decrease) through net exchange differences, other provisions 9 (21)
Other provisions at end of period € 349 372
IFRS 16 [Member]    
Provisions [Line Items]    
Other provisions at beginning of period   € 392