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Inventories - Summary of Inventories Net (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of inventories [line items] |  |
Inventories | ₩ 1,054,671 | ₩ 988,351
Merchandise [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 906,089 | 878,912
Others [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 148,582 | 109,439
Gross carrying amount [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 1,154,712 | 1,090,566
Gross carrying amount [member] | Merchandise [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 1,005,606 | 981,127
Gross carrying amount [member] | Others [member] |  |
Disclosure of inventories [line items] |  |
Inventories | 149,106 | 109,439
Valuation allowance [member] |  |
Disclosure of inventories [line items] |  |
Inventories | (100,041) | (102,215)
Valuation allowance [member] | Merchandise [member] |  |
Disclosure of inventories [line items] |  |
Inventories | (99,517) | ₩ (102,215)
Valuation allowance [member] | Others [member] |  |
Disclosure of inventories [line items] |  |
Inventories | ₩ (524) |

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