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Income from operations - Sales composition (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income from operations [Abstract]      
Sales from goods € 13,974 € 13,568 € 13,175
Sales from services 3,477 3,478 3,215
Sales from royalties 329 375 416
Sales [1] € 17,780 € 17,422 € 16,806
[1] The sales are reported based on country of destination.