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Borrowings - Summary of Assets Pledges as Collateral (Detail) ₩ in Millions	Dec. 31, 2025 KRW (₩)
Disclosure Of Assets Pledged As Collateral [line items]
Pledged amount	₩ 5,754,850
Book value [member]
Disclosure Of Assets Pledged As Collateral [line items]
Assets	5,442,535
Property, plant and equipment including investment property [member] | Korean Development Bank and others [member]
Disclosure Of Assets Pledged As Collateral [line items]
Pledged amount	5,318,147
Property, plant and equipment including investment property [member] | Book value [member] | Korean Development Bank and others [member]
Disclosure Of Assets Pledged As Collateral [line items]
Assets	5,005,832
Trade accounts and notes receivables, net [member] | Korean Development Bank and others [member]
Disclosure Of Assets Pledged As Collateral [line items]
Pledged amount	136,758
Trade accounts and notes receivables, net [member] | Book value [member] | Korean Development Bank and others [member]
Disclosure Of Assets Pledged As Collateral [line items]
Assets	136,758
Financial Instruments [member] | Korean Development Bank and others [member]
Disclosure Of Assets Pledged As Collateral [line items]
Pledged amount	27,314
Financial Instruments [member] | Book value [member] | Korean Development Bank and others [member]
Disclosure Of Assets Pledged As Collateral [line items]
Assets	27,314
Cash equivalents [member] | Shinhan Bank [member]
Disclosure Of Assets Pledged As Collateral [line items]
Pledged amount	272,631
Cash equivalents [member] | Book value [member] | Shinhan Bank [member]
Disclosure Of Assets Pledged As Collateral [line items]
Assets	₩ 272,631

X

- Definition

The fair value of collateral held that is permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 15
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_15_a&doctype=Standard
-URIDate 2025-03-27

+ Details

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X

- Definition

Asset book value.

+ References

No definition available.

+ Details

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X

- Definition

Disclosure of assets pledged as collateral.

+ References

No definition available.

+ Details

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