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Consolidated Statements of Comprehensive Income - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement of comprehensive income [abstract]      
Profit for the year ₩ 1,385,635 ₩ 1,459,395 ₩ 746,256
Other comprehensive income Items that will not be reclassified to profit or loss:      
Remeasurements of the net defined benefit liability 181,429 55,822 (60,181)
Shares of remeasurement gain (loss) of associates and joint ventures (332) (1,596) 786
Gain (loss) on valuation of equity instruments at fair value through other comprehensive income (141,944) 144,890 51,696
Other comprehensive income, Items that may be subsequently reclassified to profit or loss:      
Loss on valuation of debt instruments at fair value through other comprehensive income (16,630) (15,110) (9,699)
Valuation gain (loss) on cash flow hedge 64,091 141,855 (84,044)
Other comprehensive income (loss) from cash flow hedges reclassified to profit (loss) (95,421) (136,583) 111,431
Share of other comprehensive income (loss) from associates and joint ventures (10,851) (24,216) 15,932
Exchange differences on translation of foreign operations 17,464 505 (2,666)
Total other comprehensive income (2,194) 165,567 23,255
Total comprehensive income for the year 1,383,441 1,624,962 769,511
Total comprehensive income for the year attributable to:      
Owners of the Controlling Company 1,234,651 1,510,373 727,077
Non-controlling interest ₩ 148,790 ₩ 114,589 ₩ 42,434