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Financial Income and Costs - Summary of Details of Financial Income (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Finance Income [line items] |  |  |
Interest income | ₩ 279,607 | ₩ 271,925 | ₩ 273,460
Gain on foreign currency transactions | 27,407 | 67,976 | 19,976
Gain on foreign currency translation | 11,944 | 43,092 | 32,768
Gain on derivative transactions | 12,304 | 50,668 | 2,215
Gain on valuation of derivatives | 49,881 | 182,998 | 255,149
Gain on valuation of financial instruments | 32,477 | 31,032 | 90,653
Others | 69,216 | 42,737 | 52,062
Total | 486,277 | ₩ 690,428 | ₩ 726,283
Loans and receivables [member] |  |  |
Disclosure Of Finance Income [line items] |  |  |
Gain on disposal of trade receivables | ₩ 3,441 |  |

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