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Other Financial Assets and Liabilities - Summary of Hedging instruments (Detail) - Derivatives [member] - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about hedging instruments [line items] |  |
Foreign currency | ₩ 0 |
Contract amount | 2,672,113 | ₩ 2,957,474
Assets | 159,211 | 190,830
Liabilities | 24,547 | 33,555
Changes in fair value to calculate the ineffective portion of hedges | 45,339 | 195,905
USD |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Foreign currency | 2,011,509 | 2,111,509
Contract amount | 2,417,473 | 2,527,626
Assets | 157,681 | 160,243
Liabilities | 23,465 | 32,936
Changes in fair value to calculate the ineffective portion of hedges | 44,413 | 170,856
JPY |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Foreign currency | 400,000 | 400,000
Contract amount | 4,357 | 4,357
Assets | 0 | 0
Liabilities | 660 | 409
Changes in fair value to calculate the ineffective portion of hedges | (162) | (308)
SGD |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Foreign currency |  | 284,000
Contract amount |  | 245,208
Assets |  | 26,351
Liabilities |  | 0
Changes in fair value to calculate the ineffective portion of hedges |  | 20,511
EUR |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Foreign currency | 7,700 | 7,700
Contract amount | 10,283 | 10,283
Assets | 0 | 0
Liabilities | 231 | 210
Changes in fair value to calculate the ineffective portion of hedges | 381 | 129
KRW |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Foreign currency | 0 | 0
Contract amount | 240,000 | 170,000
Assets | 1,530 | 4,236
Liabilities | 191 | 0
Changes in fair value to calculate the ineffective portion of hedges | ₩ 707 | ₩ 4,717

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- Definition The gain (loss) on the change in fair value of the hedging instrument 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 2023-01-01 -Paragraph 24A -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24A_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 24A -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24A_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 24A -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24A_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The nominal amount of the hedging instruments in hedging relationships to which the entity is applying the exceptions in the scope of the amendments for interest rate benchmark reform. [Refer: Nominal amount of hedging instrument] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 24H -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24H_e&doctype=Standard -URIDate 2023-03-23 + Details
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