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Financial Instruments by Category - Summary of Financial Instruments by Category (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of detailed information about financial instruments [line items] |  |  |  |
Trade and other payables | ₩ 8,397,264 | ₩ 7,980,203 |  |
Borrowings | 10,006,685 | 8,437,703 |  |
Other financial liabilities | 421,441 | 497,666 |  |
Lease liabilities | 1,172,038 | 1,159,369 |  |
Cash and cash equivalents | 2,449,062 | 3,019,592 | ₩ 2,634,624 | ₩ 2,305,894
Trade and other receivables | 7,589,118 | 6,178,816 |  |
Other financial assets | 3,823,936 | 2,008,038 |  |
Loans and receivables [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | 2,449,062 | 3,019,592 |  |
Trade and other receivables | 7,459,994 | 5,687,103 |  |
Other financial assets | 1,060,058 | 608,389 |  |
Financial assets at fair value through profit or loss [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Other financial assets | 1,064,856 | 952,319 |  |
Derivative used for hedge [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Other financial liabilities | 33,555 | 18,126 |  |
Other financial assets | 190,830 | 99,453 |  |
Financial liabilities designated as at fair value through profit or loss [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Other financial liabilities | 141,280 | 216,040 |  |
Financial liabilities at amortized cost [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Trade and other payables | 8,397,264 | 7,980,203 |  |
Borrowings | 10,006,685 | 8,437,703 |  |
Other financial liabilities | 246,606 | 263,500 |  |
Financial assets at fair value through other comprehensive income [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Trade and other receivables | 129,124 | 491,713 |  |
Other financial assets | 1,508,192 | 347,877 |  |
Others [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Lease liabilities | ₩ 1,172,038 | ₩ 1,159,369 |  |

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