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Other Financial Assets and Liabilities - Summary of Hedged items (Detail) - Derivatives [member] - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of detailed information about hedged items [line items] |  |
Book value of hedged items | ₩ 3,361,069 | ₩ 2,848,287
Changes in fair value to calculate the ineffective portion of hedges | (359,198) | (45,380)
Cash flow hedge reserves | (42,140) | (28,893)
USD |  |
Disclosure of detailed information about hedged items [line items] |  |
Book value of hedged items | 3,160,554 | 2,593,707
Changes in fair value to calculate the ineffective portion of hedges | (358,087) | (44,365)
Cash flow hedge reserves | (42,425) | (30,415)
JPY |  |
Disclosure of detailed information about hedged items [line items] |  |
Book value of hedged items | 0 | 3,651
Changes in fair value to calculate the ineffective portion of hedges | 0 | 162
Cash flow hedge reserves | 0 | 49
EUR |  |
Disclosure of detailed information about hedged items [line items] |  |
Book value of hedged items | 10,548 | 10,985
Changes in fair value to calculate the ineffective portion of hedges | (437) | (581)
Cash flow hedge reserves | (228) | 158
KRW |  |
Disclosure of detailed information about hedged items [line items] |  |
Book value of hedged items | 189,967 | 239,944
Changes in fair value to calculate the ineffective portion of hedges | (674) | (596)
Cash flow hedge reserves | ₩ 513 | ₩ 1,315

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- Definition The gain (loss) on the change in fair value of the hedged item used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_iv&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_b_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of a hedged item, recognised as an asset. [Refer: Hedged items [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition A component of equity representing the reserve of cash flow hedges in relation to continuing hedges. [Refer: Reserve of cash flow hedges] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_b_ii&doctype=Standard -URIDate 2024-03-27 + Details
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