Enel SpA Economic results by areas of activity_Results by business area for 2017 and 2016_Results for 2016 (1) - Millions of euro EN Resultsfor2016_en Revenue from third parties 36,091 18,831 10,739 3,618 1,122 29 162 70,592 (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 954 122 29 180 3 - -1,288 - (2)�Does�not�include��7�million�regarding�units�classified�as��held�for�sale�. Total revenue 37,045 18,953 10,768 3,798 1,125 29 -1,126 70,592 (3)�Does�not�include��283�million�regarding�units�classified�as��held�for�sale�. Net income/(expense) from commodity contracts measured at fair value -266 131 9 -6 -1 - - -133 Gross operating margin 6,618 3,562 3,556 762 833 14 -69 15,276 Depreciation, amortization and impairment losses 2,348 1,796 1,393 476 268 19 55 6,355 Operating income 4,270 1,766 2,163 286 565 -5 -124 8,921 Capital expenditure 1894 (2) 1,147 3,069 265 (3) 1,832 304 41 8,552