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Investment Properties - Summary of Investment Properties Provided as Collateral (Detail) - Land and buildings [member] - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Deposits 1 [member] |  |
Disclosure of detailed information about investment property [line items] |  |
Carrying amount | ₩ 854,874 | ₩ 548,567
Secured amount | ₩ 62,896 | ₩ 66,551
Related account | Deposits | Deposits
Related amount | ₩ 56,831 | ₩ 59,492
Borrowings [member] |  |
Disclosure of detailed information about investment property [line items] |  |
Carrying amount | 1,915 | 5,292
Secured amount | ₩ 3,044 | ₩ 3,987
Related account | Borrowings | Borrowings
Related amount | ₩ 1,903 | ₩ 3,322

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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