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Trade and Other Current Receivables -Summary of Trade and Other Current Receivables (Detail) - EUR (€)
€ in Millions
Dec. 31, 2017
Dec. 31, 2016
Trade and other current receivables [Abstract]    
Trade receivables € 3,439 € 3,329
Prepayments and accrued income 452 504
Other receivables 1,331 1,269
Total trade and other current receivables € 5,222 € 5,102