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Intangible Assets - Summary of Geographically Cash-Generating Units to Goodwill (Detail) - EUR (€)
€ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill € 392 € 384
Americas [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill 183 182
Southern And Eastern Europe [Member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill 29 30
Asia [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill 34 33
United Kingdom [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill 57 54
The Netherlands [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill € 89 € 85