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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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | ₩ 41,925 | ₩ 296,186 | ₩ 18,765
Purchases | 54,222 | 37,774 | 18,499
K-Realty CR-REITs No.1 [member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue |  | 238,847 | 2,298
Purchases |  | 1,308 |
Others [member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 11,964 | 28,092 | 809
Purchases | 37,742 | 21,302 | 10,272
K Bank [member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 29,536 | 24,247 | 15,658
Purchases | 11,007 | 15,164 | ₩ 8,227
IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue |  | 5,000 |
Purchases |  | ₩ 0 |
Hyundai Robotics Co., Ltd [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 94 |  |
Purchases | 3,799 |  |
Digital Pharm Co., Ltd [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 1 |  |
K-Realty 11th Real Estate Investment Trust Company [Member] |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Operating Revenue | 330 |  |
Purchases | ₩ 1,674 |  |

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