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Commitments and Contingencies - Summary of Guarantees Received from Financial Institutions (Detail) - Dec. 31, 2024 € in Thousands, ₫ in Thousands, $ in Thousands, ₩ in Millions | KRW (₩) | USD ($) | VND (₫) | EUR (€)
--- | --- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | ₩ 3,585,768 | $ 120,523 | ₫ 222,914 | € 6,900
Guarantee for payment in korean currency [member] | Hana Bank [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 4,000 |  |  |
Guarantee for payment in korean currency [member] | Shinhan Bank [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 710 |  |  |
Guarantee for payment in korean currency [member] | Woori Bank [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 5,100 |  |  |
Comprehensive Credit Line and Others [Member] | Hana Bank [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 2,900 | 10,300 |  |
Guarantee for payment in foreign currency [member] | Hana Bank [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | $ |  | 59 |  |
Guarantee for payment in foreign currency [member] | Kookmin Bank [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | $ |  | 3,186 |  |
Guarantee for payment in foreign currency [member] | Woori Bank [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit |  | 7,000 |  | € 6,900
Guarantee For Payment In Foreign Currency And Others [Member] | Shinhan Bank [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | $ |  | 98,842 |  |
Guarantees for depositions [Member] | H S B C [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | $ |  | 807 |  |
Corporate Card Issuance Guarantee [Member] | Shinhan Bank [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | ₫ |  |  | ₫ 222,914 |
Performance guarantee and others [Member] | Hana Bank [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | $ |  | 59 |  |
Performance guarantee and others [Member] | Woori Bank [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | $ |  | $ 270 |  |
Performance guarantee and others [Member] | Seoul Guarantee Insurance Company [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 404,991 |  |  |
Performance guarantee and others [Member] | Korea Software Financial Cooperative [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 1,611,632 |  |  |
Performance guarantee and others [Member] | Korea Specialty Contractor Financial Cooperative [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 135 |  |  |
Performance guarantee and others [Member] | Korea Housing Finance Corporation [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 26,526 |  |  |
Performance guarantee and others [Member] | Korea Housing Urban Guarantee Corporation [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | 691,530 |  |  |
Performance guarantee and others [Member] | Information Communication Financial Cooperative [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Guarantees limit | ₩ 838,244 |  |  |

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