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Related Party Transactions - Summary of Transactions Prior Liquidation (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Statement [Line Items] |  |  |
Payables | ₩ 0 | ₩ 20,857 |
Acquisition of right of use assets [member] |  |  |
Statement [Line Items] |  |  |
Dividend Income |  |  | ₩ 776
Acquisition of right of use assets [member] | K-Realty CR-REITs No.1 [member] |  |  |
Statement [Line Items] |  |  |
Dividend Income |  |  | 776
Finance costs [member] | K-Realty CR-REITs No.1 [member] |  |  |
Statement [Line Items] |  |  |
Payables |  |  | 2,225
Interest Expense [member] |  |  |
Statement [Line Items] |  |  |
Payables | 205 | 917 | 2,225
Interest Expense [member] | K-Realty CR-REITs No.1 [member] |  |  |
Statement [Line Items] |  |  |
Dividend Income | 205 | 917 |
Dividend Income [member] |  |  |
Statement [Line Items] |  |  |
Payables | 48,779 | 17,345 | 15,354
Dividend Income [member] | K-Realty CR-REITs No.1 [member] |  |  |
Statement [Line Items] |  |  |
Dividend Income | 40,142 | 8,061 |
Payables |  |  | 10,928
Dividend Income [member] | Others [member] |  |  |
Statement [Line Items] |  |  |
Dividend Income | 8,637 | 43 |
Payables |  |  | 146
Dividend Income [member] | Korea Information & Technology Investment Fund (KIF Investment Fund) [member] |  |  |
Statement [Line Items] |  |  |
Payables |  | 9,241 | ₩ 4,280
Interest income [member] |  |  |
Statement [Line Items] |  |  |
Dividend Income | 223 | 14 |
Interest income [member] | K Bank [member] |  |  |
Statement [Line Items] |  |  |
Dividend Income |  | ₩ 14 |
Interest income [member] | Korea Information & Technology Investment Fund (KIF Investment Fund) [member] |  |  |
Statement [Line Items] |  |  |
Dividend Income | ₩ 223 |  |

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