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Financial Risk Management - Summary of Expected Credit Losses Reflect Forward-Looking Information (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of provision matrix [line items] |  |
Expected credit loss rate | 0.00% | 0.00%
Financial assets | ₩ 15,486,942 | ₩ 13,766,638
Less than 6 months [member] |  |
Disclosure of provision matrix [line items] |  |
Expected credit loss rate | 5.43% | 5.57%
7-12 months [member] |  |
Disclosure of provision matrix [line items] |  |
Expected credit loss rate | 21.72% | 25.84%
More than 1 years [member] |  |
Disclosure of provision matrix [line items] |  |
Expected credit loss rate | 54.55% | 67.16%
Carrying amounts [member] |  |
Disclosure of provision matrix [line items] |  |
Financial assets | ₩ 3,770,489 | ₩ 3,700,050
Carrying amounts [member] | Less than 6 months [member] |  |
Disclosure of provision matrix [line items] |  |
Financial assets | 3,466,588 | 3,443,163
Carrying amounts [member] | 7-12 months [member] |  |
Disclosure of provision matrix [line items] |  |
Financial assets | 68,772 | 49,491
Carrying amounts [member] | More than 1 years [member] |  |
Disclosure of provision matrix [line items] |  |
Financial assets | 235,129 | 207,396
Provision for impairment [member] |  |
Disclosure of provision matrix [line items] |  |
Financial assets | (331,290) | (343,738)
Provision for impairment [member] | Less than 6 months [member] |  |
Disclosure of provision matrix [line items] |  |
Financial assets | (188,086) | (191,668)
Provision for impairment [member] | 7-12 months [member] |  |
Disclosure of provision matrix [line items] |  |
Financial assets | (14,940) | (12,789)
Provision for impairment [member] | More than 1 years [member] |  |
Disclosure of provision matrix [line items] |  |
Financial assets | ₩ (128,264) | ₩ (139,281)

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