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Financial Risk Management - Additional Information (Detail) $ in Thousands, ₩ in Millions | Dec. 31, 2021 KRW (₩) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 KRW (₩)
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Disclosure of detailed information about financial instruments [line items] |  |  |
Amounts payable, related party transactions | ₩ 0 |  | ₩ 20,857
IBK KT Emerging Digital Industry Investment Fund [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Investment In Related Party | 27,200 |  |
Future Innovation Private Equity Fund No.3 [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Amounts payable, related party transactions | ₩ 8,109 | $ 5,400 |

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