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Consolidated Statements of Comprehensive Income - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Statement of comprehensive income [abstract]      
Profit for the year ₩ 972,182 ₩ 1,385,635 ₩ 1,459,395
Other comprehensive income Items that will not be reclassified to profit or loss:      
Remeasurements of the net defined benefit liability (137,465) 181,429 55,822
Shares of remeasurement gain (loss) of associates and joint ventures (105) (332) (1,596)
Gain (loss) on valuation of equity instruments at fair value through other comprehensive income 121,271 (141,944) 144,890
Other comprehensive income, Items that may be subsequently reclassified to profit or loss:      
Gain(loss) on valuation of debt instruments at fair value through other comprehensive income 534 (16,630) (15,110)
Valuation gain (loss) on cash flow hedge 15,329 64,091 141,855
Other comprehensive income (loss) from cash flow hedges reclassified to profit (loss) (37,942) (95,421) (136,583)
Share of other comprehensive income (loss) from associates and joint ventures 21,595 (10,851) (24,216)
Exchange differences on translation of foreign operations 24,230 17,464 505
Total other comprehensive income 7,447 (2,194) 165,567
Total comprehensive income for the year 979,629 1,383,441 1,624,962
Total comprehensive income for the year attributable to:      
Owners of the Controlling Company 996,999 1,234,651 1,510,373
Non-controlling interest ₩ (17,370) ₩ 148,790 ₩ 114,589