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Consolidated Statements of Profit or Loss - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Profit or loss [abstract]      
Operating revenue ₩ 26,234,206 ₩ 25,205,659 ₩ 24,440,647
Revenue 25,638,855 24,898,005 24,099,394
Other income 595,351 307,654 341,253
Operating expenses 24,266,049 23,506,262 23,418,314
Operating profit 1,968,157 1,699,397 1,022,333
Finance income 690,428 726,283 498,614
Finance costs (749,908) (563,330) (507,383)
Share of net profits of associates and joint ventures (17,285) 116,061 18,041
Profit before income tax 1,891,392 1,978,411 1,031,605
Income tax expense 505,757 519,016 285,349
Profit for the year 1,385,635 1,459,395 746,256
Profit for the year attributable to:      
Profit (loss) for the year attributable to Owners of the Controlling Company 1,260,470 1,356,878 700,889
Profit (loss) for the year attributable to Non-controlling interest ₩ 125,165 ₩ 102,517 ₩ 45,367
Earnings per share attributable to the equity holders of the Controlling Company during the year (in Korean won):      
Basic earnings per share ₩ 5,200 ₩ 5,759 ₩ 2,858
Diluted earnings per share ₩ 5,196 ₩ 5,747 ₩ 2,858