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Financial Instruments by Category - Summary of Financial Instruments by Category (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of detailed information about financial instruments [line items] |  |  |  |
Trade and other payables | ₩ 8,317,822 | ₩ 8,397,264 |  |
Borrowings | 10,218,165 | 10,006,685 |  |
Other financial liabilities | 1,075,838 | 421,441 |  |
Lease liabilities | 1,179,909 | 1,172,038 |  |
Cash and cash equivalents | 2,879,554 | 2,449,062 | ₩ 3,019,592 | ₩ 2,634,624
Trade and other receivables | 8,574,457 | 7,589,118 |  |
Other financial assets | 4,164,961 | 3,823,936 |  |
Loans and receivables [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | 2,879,554 | 2,449,062 |  |
Trade and other receivables | 8,458,259 | 7,459,994 |  |
Other financial assets | 1,385,921 | 1,060,058 |  |
Financial assets at fair value through profit or loss [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Other financial assets | 939,661 | 1,064,856 |  |
Derivative used for hedge [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Other financial liabilities | 24,547 | 33,555 |  |
Other financial assets | 159,211 | 190,830 |  |
Financial liabilities designated as at fair value through profit or loss [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Other financial liabilities | 136,106 | 141,280 |  |
Financial liabilities at amortized cost [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Trade and other payables | 8,317,822 | 8,397,264 |  |
Borrowings | 10,218,165 | 10,006,685 |  |
Other financial liabilities | 915,185 | 246,606 |  |
Financial assets at fair value through other comprehensive income [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Trade and other receivables | 116,198 | 129,124 |  |
Other financial assets | 1,680,168 | 1,508,192 |  |
Others [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Lease liabilities | ₩ 1,179,909 | ₩ 1,172,038 |  |

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