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Consolidated Statements of Operations - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Profit or loss [abstract] |  |  |
Operating revenue | ₩ 24,899,189 | ₩ 23,436,050 | ₩ 23,546,929
Revenue | 24,639,758 | 23,220,052 | 23,259,541
Others | 259,431 | 215,998 | 287,388
Operating expenses | 23,879,015 | 22,335,190 | 22,477,837
Operating profit | 1,020,174 | 1,100,860 | 1,069,092
Finance income | 424,395 | 374,243 | 406,328
Finance costs | (421,931) | (435,659) | (644,531)
Share of net profits of associates and joint venture | (3,304) | (5,467) | (13,892)
Profit before income tax | 1,019,334 | 1,033,977 | 816,997
Income tax expense | 320,060 | 314,565 | 270,656
Profit for the year | 699,274 | 719,412 | 546,341
Profit for the year attributable to: |  |  |
Profit (loss) for the year attributable to Owners of the Controlling Company | 649,109 | 645,571 | 461,559
Profit (loss) for the year attributable to Non-controlling interest | ₩ 50,165 | ₩ 73,841 | ₩ 84,782
Earnings per share attributable to the equity holders of the Controlling Company during the year (in Korean won): |  |  |
Basic earnings per share | ₩ 2,648 | ₩ 2,634 | ₩ 1,884
Diluted earnings per share | ₩ 2,646 | ₩ 2,634 | ₩ 1,883

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