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Related Party Transactions - Summary of Related Parties Outstanding Balances of Receivables and Payables (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Trade receivables [member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | ₩ 11,614 | ₩ 7,824
Trade receivables [member] | K Bank Inc.[Member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 778 | 862
Trade receivables [member] | Little Big Pictures [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 235 | 232
Trade receivables [member] | K-Realty 11th Real Estate Investment Trust Company [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 113 | 110
Trade receivables [member] | K-Realty No.3 Real Estate General Private Placement Investment Company [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 7,911 | 4,576
Trade receivables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 2,439 | 2,044
Trade receivables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 138 |
Other Receivables [member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 152,415 | 330,924
Other Receivables [member] | K Bank Inc.[Member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 147,868 | 326,006
Other Receivables [member] | Little Big Pictures [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 1,396 | 3,473
Other Receivables [member] | K-Realty 11th Real Estate Investment Trust Company [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 1,283 | 1,283
Other Receivables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 1,628 | 162
Other Receivables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables | 240 |
Lease receivables [member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables |  | 769
Lease receivables [member] | K Bank Inc.[Member] |  |
Disclosure of transactions between related parties [line items] |  |
Receviables |  | 769
Trade payables [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 1,303 | 2,909
Trade payables [member] | Little Big Pictures [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables |  | 9
Trade payables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 1,302 | 2,900
Trade payables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 1 |
Other payables [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 1,411 | 3,334
Other payables [member] | K Bank Inc.[Member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 83 | 299
Other payables [member] | Little Big Pictures [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 2 | 6
Other payables [member] | Others [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 1,326 | 3,029
Lease liabilities [member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | 4,588 | 6,732
Lease liabilities [member] | K-Realty 11th Real Estate Investment Trust Company [Member] |  |
Disclosure of transactions between related parties [line items] |  |
Payables | ₩ 4,588 | ₩ 6,732

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