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Provisions - Other provisions (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Provisions - Text Details (Detail) [Line Items]      
Unused provision reversed, other provisions   € 88  
Acquisitions € 45    
Miscellaneous other provisions [member]      
Provisions - Text Details (Detail) [Line Items]      
Other provisions at beginning of period 564 733 € 604
Additional provisions, other provisions [1] 176 241 183
Provision used, other provisions [1] (226) (175) (167)
Unused provision reversed, other provisions (58) (88) (61)
Increase (decrease) through transfers and other changes, other provisions 2 4 142
Increase through adjustments arising from passage of time, other provisions 14 0 8
Acquisitions 367 62 0
Transfer to assets held for sale   (156)  
Increase (decrease) through net exchange differences, other provisions 3 (56) 24
Other provisions at end of period € 842 € 564 € 733
[1] The presentation of prior-year information has been reclassified to conform to the current-year presentation.