XML 144 R137.htm IDEA: XBRL DOCUMENT v3.8.0.1
Treasury Risk Management - Summary of Derivative Cash Flow Hedges (Detail) - EUR (€)
€ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Derivative Cash Flow Hedges [Line Items]    
Foreign exchange cash inflows € 3,510 € 2,863
Foreign exchange cash outflows (3,536) (2,905)
Interest rate cash flows (24) (2)
Commodity contracts cash flows (19) (3)
Within 1 year [Member]    
Disclosure Of Derivative Cash Flow Hedges [Line Items]    
Foreign exchange cash inflows 3,510 2,863
Foreign exchange cash outflows (3,536) (2,905)
Interest rate cash flows 30 4
Commodity contracts cash flows (19) (3)
Due between 1 and 2 years [Member]    
Disclosure Of Derivative Cash Flow Hedges [Line Items]    
Interest rate cash flows 45 (6)
Due between 2 and 3 years [Member]    
Disclosure Of Derivative Cash Flow Hedges [Line Items]    
Interest rate cash flows (26)  
Due between 3 and 4 years [Member]    
Disclosure Of Derivative Cash Flow Hedges [Line Items]    
Interest rate cash flows 31  
Due between 4 and 5 years [Member]    
Disclosure Of Derivative Cash Flow Hedges [Line Items]    
Interest rate cash flows (44)  
Later than 5 years [Member]    
Disclosure Of Derivative Cash Flow Hedges [Line Items]    
Interest rate cash flows (60)  
Net Carrying Amount [Member]    
Disclosure Of Derivative Cash Flow Hedges [Line Items]    
Foreign exchange cash outflows (8) (40)
Interest rate cash flows (351)  
Commodity contracts cash flows € (7) € 18