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Liability under insurance contracts and reinsurance contracts - Summary of current estimates of future cash flows (Details) - ₩ / shares	Dec. 31, 2025	Dec. 31, 2024
Life insurance
Life insurance:
Expense Ratio	₩ 0	₩ 0
The confidence level for nonfinancial risks	75.00%	75.00%
Non life insurance [Member]
Life insurance:
Expense Ratio	₩ 0	₩ 0
The confidence level for nonfinancial risks	75.00%	75.00%
Bottom of range [member]
Life insurance:
Discount rate	3.81%	3.45%
Bottom of range [member] | Life insurance
Life insurance:
Lapse ratio	0.00%	0.00%
Loss ratio	3.16%	8.00%
Discount rate	2.79%	2.31%
Bottom of range [member] | Non life insurance [Member]
Life insurance:
Lapse ratio		0.00%
Loss ratio	12.43%	12.98%
Discount rate	2.79%	2.31%
Bottom of range [member] | Long-term contracts [member] | Non life insurance [Member]
Life insurance:
Lapse ratio	0.12%	1.60%
Loss ratio	44.62%	36.81%
Top of range [member]
Life insurance:
Discount rate	4.93%	4.66%
Top of range [member] | Life insurance
Life insurance:
Lapse ratio	66.77%	69.75%
Loss ratio	1787.70%	316.00%
Discount rate	4.59%	4.55%
Top of range [member] | Non life insurance [Member]
Life insurance:
Lapse ratio		52.76%
Loss ratio	66.91%	81.54%
Discount rate	4.30%	4.55%
Top of range [member] | Long-term contracts [member] | Non life insurance [Member]
Life insurance:
Lapse ratio	25.47%	25.47%
Loss ratio	281.80%	422.10%

X

- Definition

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2025-01-01
-Paragraph 144
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_144&doctype=Standard
-URIDate 2025-03-27

+ Details

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X

- Definition

Acturial Assumption Of Expense Ratio

+ References

No definition available.

+ Details

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X

- Definition

Acturial Assumption Of Loss ratio

+ References

No definition available.

+ Details

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- Definition

Acturial assumption of surrender ratio.

+ References

No definition available.

+ Details

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- Definition

Life insurance abstract.

+ References

No definition available.

+ Details

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X

- Definition

The confidence level for non-financial risks

+ References

No definition available.

+ Details

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- Details

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- Details

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