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Financial Instruments - Additional Information (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk related financial guarantees	₩ 31,708,876	₩ 30,256,184
Financial guarantee [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk related financial guarantees	₩ 3,613,477	₩ 3,832,003

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 35K
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_35K_a&doctype=Standard
-URIDate 2025-03-27

+ Details

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- Details

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