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Goodwill and Intangible Assets - Summary of Goodwill and Indefinite-life Intangible Assets Held in Significant CGUs (Detail) - EUR (€)
€ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill € 16,881 € 17,624
Foods (excluding Spreads) [Member] | Europe [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill 4,500  
Indefinite-life intangible assets 1,600  
Foods (excluding Spreads) [Member] | The Americas [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill 2,800  
Indefinite-life intangible assets 1,400  
Foods (excluding Spreads) [Member] | Asia/AMET/RUB [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill 1,500  
Indefinite-life intangible assets 400  
Personal care [member] | The Americas [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill 2,500 2,800
Indefinite-life intangible assets € 1,500 1,700
Foods [member] | Europe [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill   5,800
Indefinite-life intangible assets   1,600
Foods [member] | The Americas [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill   3,900
Indefinite-life intangible assets   1,600
Foods [member] | Asia/AMET/RUB [member]    
Disclosure of detailed information about intangible assets [Line Items]    
Goodwill   1,800
Indefinite-life intangible assets   € 500