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Related Party Transactions - Summary of Related Parties Outstanding Balances of Receivables and Payables (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of transactions between related parties [line items] |  |
Payables | ₩ 0 | ₩ 20,857
Trade receivables [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | 6,000 | 1,304
Trade receivables [member] | K-Realty CR-REITs No.1 [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | 821 | 457
Trade receivables [member] | K Bank [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income |  | 775
Trade receivables [member] | IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | 4,614 |
Trade receivables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | 565 | 72
Loans and receivables [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | 53,275 | 50,311
Loans and receivables [member] | K-Realty CR-REITs No.1 [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | 51,422 | 16,200
Loans and receivables [member] | K Bank [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income |  | 32,964
Loans and receivables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | 1,853 | 1,147
Other payables [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 5,342 | 1,749
Other payables [member] | K-Realty CR-REITs No.1 [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 0 | 20,857
Other payables [member] | K Bank [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 513 | 891
Other payables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 4,829 | ₩ 858
Trade Payable [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | 343 |
Trade Payable [Member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Dividend Income | ₩ 343 |

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