Reinsurance Contracts - Summary of Reinsurance Contract Assets and Insurance Contract Liabilities (Details) - Reinsurance contracts held [member] - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Summary of Reinsurance Contract Assets and Insurance Contract Liabilities Explanatory [Line Items]
Reinsurance contracts assets	₩ 620,207	₩ 0
Reinsurance contracts liabilities	184,792	0
Net reinsurance contracts asset (liabilities)	435,415	₩ 0
Life [Member]
Summary of Reinsurance Contract Assets and Insurance Contract Liabilities Explanatory [Line Items]
Reinsurance contracts assets	381,667
Reinsurance contracts liabilities	52,842
Net reinsurance contracts asset (liabilities)	328,825
Health [member]
Summary of Reinsurance Contract Assets and Insurance Contract Liabilities Explanatory [Line Items]
Reinsurance contracts assets	231,261
Reinsurance contracts liabilities	131,344
Net reinsurance contracts asset (liabilities)	99,917
Annuity/ Savings and others [member]
Summary of Reinsurance Contract Assets and Insurance Contract Liabilities Explanatory [Line Items]
Reinsurance contracts assets	7,279
Reinsurance contracts liabilities	606
Net reinsurance contracts asset (liabilities)	₩ 6,673

The amount of insurance contracts liability (asset). [Refer: Assets; Liabilities; Insurance contracts [domain]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2025-01-01
-Paragraph 99
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2025-en-r&anchor=para_99_b&doctype=Standard
-URIDate 2025-03-27

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- Definition

The amount of insurance contracts that are assets. [Refer: Assets; Insurance contracts [domain]]

+ References

+ Details

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- Definition

The amount of insurance contracts that are liabilities. [Refer: Liabilities; Insurance contracts [domain]]

+ References

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- References

No definition available.

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