Insurance Contracts - Summary of breakdown of insurance contract assets and insurance contract liabilities (Details) - Insurance contracts issued [member] - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Summary Of Insurance Contract Assets And Insurance Contract Liabilities [Line Items]
Insurance contracts assets	₩ 0	₩ 0
Insurance contracts liabilities	45,573,864	0
Net insurance contracts liabilities (asset)	45,573,864	₩ 0
Life [Member]
Summary Of Insurance Contract Assets And Insurance Contract Liabilities [Line Items]
Insurance contracts assets	0
Insurance contracts liabilities	8,078,577
Net insurance contracts liabilities (asset)	8,078,577
Health [member]
Summary Of Insurance Contract Assets And Insurance Contract Liabilities [Line Items]
Insurance contracts assets	0
Insurance contracts liabilities	8,032,075
Net insurance contracts liabilities (asset)	8,032,075
Annuity/ Savings and others [member]
Summary Of Insurance Contract Assets And Insurance Contract Liabilities [Line Items]
Insurance contracts assets	0
Insurance contracts liabilities	25,460,803
Net insurance contracts liabilities (asset)	25,460,803
Variable [Member]
Summary Of Insurance Contract Assets And Insurance Contract Liabilities [Line Items]
Insurance contracts assets	0
Insurance contracts liabilities	4,002,409
Net insurance contracts liabilities (asset)	₩ 4,002,409

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

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- Definition

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

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- Definition

Summary of insurance contract assets and insurance contract liabilities.

+ References

No definition available.

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