v3.19.3.a.u2
Property and Equipment - Summary of Property and Equipment (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance € 197  
Impairment charge (6)  
Ending Balance 291 € 197
Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance 277 178
Additions 126 145
Acquired in business combinations 6  
Disposals (67) (47)
Exchange differences 7 1
Ending Balance 349 277
Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance (80) (105)
Depreciation charge (29) (21)
Impairment charge (6)  
Disposals 58 45
Exchange differences (1) 1
Ending Balance (58) (80)
Property and Equipment    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance 11  
Ending Balance 25 11
Property and Equipment | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance 61 105
Additions 20 3
Acquired in business combinations 1  
Disposals (29) (46)
Exchange differences 1 (1)
Ending Balance 54 61
Property and Equipment | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance (50) (84)
Depreciation charge (8) (12)
Disposals 30 45
Exchange differences (1) 1
Ending Balance (29) (50)
Leasehold Improvements    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance 186  
Ending Balance 266 186
Leasehold Improvements | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance 216 73
Additions 106 142
Acquired in business combinations 5  
Disposals (38) (1)
Exchange differences 6 2
Ending Balance 295 216
Leasehold Improvements | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning Balance (30) (21)
Depreciation charge (21) (9)
Impairment charge (6)  
Disposals 28  
Ending Balance € (29) € (30)