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Financial Risk Management - Summary of Contractual Undiscounted Cash Flows (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Trade and other payables | ₩ 8,260,180 | ₩ 8,922,416
Borrowings (including debentures) | 11,361,800 | 10,693,722
Lease liabilities | 1,177,812 | 1,340,166
Other non-derivative financial liabilities | 1,162,343 | 1,130,037
Financial guarantee contracts | 108,881 | 116,719
Total | 22,071,016 | 22,203,060
Less than 1 year [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Trade and other payables | 7,509,703 | 8,184,036
Borrowings (including debentures) | 4,206,534 | 2,922,557
Lease liabilities | 360,361 | 313,431
Other non-derivative financial liabilities | 391,039 | 372,743
Financial guarantee contracts | 108,881 | 13,719
Total | 12,576,518 | 11,806,486
1-5 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Trade and other payables | 728,268 | 730,340
Borrowings (including debentures) | 5,485,468 | 6,027,323
Lease liabilities | 674,594 | 617,561
Other non-derivative financial liabilities | 756,024 | 747,221
Financial guarantee contracts | 0 | 103,000
Total | 7,644,354 | 8,225,445
More than 5 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Trade and other payables | 22,209 | 8,040
Borrowings (including debentures) | 1,669,798 | 1,743,842
Lease liabilities | 142,857 | 409,174
Other non-derivative financial liabilities | 15,280 | 10,073
Financial guarantee contracts | 0 | 0
Total | ₩ 1,850,144 | ₩ 2,171,129

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