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Trade Payables and Other - Detailed Information about Trade and Other Payables (Detail) - EUR (€)
€ in Millions
Dec. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Trade and other payables [abstract]      
Trade payables € 0   € 0
Fixed assets payables 0   0
Employees' entitlements 0   0
Taxes payable other than income tax 0   0
Deferred revenue     34
Contract liabilities 9 € 32  
Other payables 18   20
Total Other 27   54
Total Trade payables and other 27   54
Trade payables 685   717
Fixed assets payables 30   27
Employees' entitlements 160   159
Taxes payable other than income tax 16   12
Deferred revenue     10
Contract liabilities 68 € 51  
Other payables 9   5
Total Other 283   213
Total Trade payables and other € 968   € 930