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Inventories - Summary of Inventories Net (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of inventories [line items] |  |
Inventories | ₩ 717,673 | ₩ 514,145
Merchandise [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 672,738 | 481,056
Others [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 44,935 | 33,089
Gross carrying amount [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 813,683 | 634,449
Gross carrying amount [member] | Merchandise [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 768,748 | 601,360
Gross carrying amount [member] | Others [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 44,935 | 33,089
Valuation allowance [member] |  |
Disclosure of inventories [line items] |  |
Inventories | (96,010) | (120,304)
Valuation allowance [member] | Merchandise [member] |  |
Disclosure of inventories [line items] |  |
Inventories | ₩ (96,010) | ₩ (120,304)

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