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Financial Assets at Fair Value through Profit or Loss - Summary of Income (Loss) from Financial Assets at fair Value Through Profit or Loss (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Financial Assets At Fair Value Through Profit Or Loss [Line Items] |  |
Gains (losses) on financial assets at fair value through profit or loss | ₩ 34,444 | ₩ 40,699
Financial assets at fair value through profit or loss | Beneficiary securities |  |
Financial Assets At Fair Value Through Profit Or Loss [Line Items] |  |
Gains (losses) on financial assets at fair value through profit or loss | 13,632 | 6,127
Financial assets at fair value through profit or loss | Cooperative securities |  |
Financial Assets At Fair Value Through Profit Or Loss [Line Items] |  |
Gains (losses) on financial assets at fair value through profit or loss | 110 | 645
Financial assets at fair value through profit or loss | Debt with embedded derivatives |  |
Financial Assets At Fair Value Through Profit Or Loss [Line Items] |  |
Gains (losses) on financial assets at fair value through profit or loss | 854 | 3,598
Financial assets at fair value through profit or loss | Other |  |
Financial Assets At Fair Value Through Profit Or Loss [Line Items] |  |
Gains (losses) on financial assets at fair value through profit or loss | ₩ 19,848 | ₩ 30,329

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