Enel SpA Results by business area_Results by business area for 2017 and 2016 - Results for 2017 (1) - Millions of euro EN Resultsbybusinessareafor2017and2016_en Revenue from third parties 37,900 19,940 13,126 2,374 1,185 96 18 74,639 (1) Segment revenue include both revenue from third parties and revenue flows between the segments. An analogous approach was taken for other income and costs for the year. Revenue from transactions with other segments 881 54 28 37 2 - -1,002 - (2) Does not include �44 million regarding units classified as �held for sale� Total revenue 38,781 19,994 13,154 2,411 1,187 96 -984 74,639 (3) Does not include �325 million regarding units classified as �held for sale� Net income/(expense) from commodity contracts measured at fair value 537 13 26 - 2 - - 578 Gross operating margin 6,863 3,573 4,204 543 759 57 -346 15,653 Depreciation, amortization and impairment losses 2,393 1,731 1,234 237 206 42 18 5,861 Operating income 4,470 1,842 2,970 306 553 15 -364 9,792 Capital expenditure 1,812 1,105 3,002 307 (2) 1802 (3) 30 72 8,130