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Segment Information - Summary of Segment Information (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of operating segments [Line Items] |  |  |
Operating revenues | ₩ 26,234,206 | ₩ 25,205,659 | ₩ 24,440,647
Operating income (loss) | 1,968,157 | 1,699,397 | 1,022,333
Depreciation and Amortization | 3,655,879 | 3,607,638 | 3,634,284
Operating segments [member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating revenues | 31,456,833 | 29,737,242 | 28,612,918
Operating income (loss) | 2,073,417 | 1,755,230 | 1,175,170
Depreciation and Amortization | 3,852,350 | 3,712,507 | 3,718,122
Operating segments [member] | ICT [member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating revenues | 18,697,269 | 18,734,342 | 18,275,765
Operating income (loss) | 1,347,405 | 1,170,920 | 809,741
Depreciation and Amortization | 3,105,807 | 3,217,643 | 3,233,878
Operating segments [member] | Finance [member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating revenues | 3,615,307 | 3,526,743 | 3,344,286
Operating income (loss) | 119,805 | 104,511 | 101,825
Depreciation and Amortization | 47,638 | 46,223 | 41,693
Operating segments [member] | Satellite TV [member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating revenues | 709,160 | 665,081 | 668,320
Operating income (loss) | 19,797 | 61,398 | 64,627
Depreciation and Amortization | 58,413 | 60,980 | 58,181
Operating segments [member] | Real estate [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating revenues | 474,954 | 336,218 | 543,587
Operating income (loss) | 113,134 | 27,498 | 76,431
Depreciation and Amortization | 65,457 | 60,459 | 56,205
Operating segments [member] | Others [member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating revenues | 7,960,143 | 6,474,858 | 5,780,960
Operating income (loss) | 473,276 | 390,903 | 122,546
Depreciation and Amortization | 575,035 | 327,202 | 328,165
Elimination [member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating revenues | (5,222,627) | (4,531,583) | (4,172,271)
Operating income (loss) | (105,260) | (55,833) | (152,837)
Depreciation and Amortization | ₩ (196,471) | ₩ (104,869) | ₩ (83,838)

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