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Employee benefit obligations - Amounts recognized in consolidated income statement (Details) - Ardagh Group S.A. - Defined benefit plan - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Employee benefit obligations      
Cost of sales-current service cost € (38) € (37) € (40)
Cost of sales-past service credit 7 29  
SGA-current service cost (3) (5) (5)
SGA-past service credit 2 10  
Current service cost and administration costs excluding finance expense (32) (3) (45)
Finance expense (Note 5) (22) (24) (23)
Current service cost and administration costs € (54) € (27) € (68)