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Related Party Transactions - Summary of Significant Transactions with Related Parties (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | ₩ 90,023 | ₩ 50,650 | ₩ 41,925
Purchases | 61,615 | 58,339 | 54,222
HD Hyundai Robotics Co., Ltd.(formerly Hyundai Robotics Co., Ltd.) [member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 75 | 78 |
Purchases |  | 182 |
K-Realty 11th Real Estate Investment Trust Company [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 236 | 346 | 330
Purchases | 2,547 | 2,559 | 1,674
Others [member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 25,534 | 21,308 | 11,964
Purchases | 33,804 | 42,169 | 37,742
Digital Pharm Co., Ltd [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue |  | 1 | 1
K Bank, Inc.[member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 31,721 | 22,701 | 29,536
Purchases | 22,548 | 13,429 | 11,007
Hyundai Robotics Co., Ltd [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue |  |  | 94
Purchases |  |  | ₩ 3,799
K-Realty No.3 Real Estate General Private Placement Investment Company [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 32,286 | ₩ 6,216 |
Other Related Parties One [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 171 |  |
Purchases | ₩ 2,716 |  |

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