XML 201 R164.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments - Capital Expenditures Commitments (Detail) - EUR (€)
€ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure of capital expenditures commitments [line items]    
Capital expenditure commitments € 101 € 88
Computer software [member]    
Disclosure of capital expenditures commitments [line items]    
Capital expenditure commitments 2 3
Property, plant and equipment [member]    
Disclosure of capital expenditures commitments [line items]    
Capital expenditure commitments € 99 € 85