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Property and Equipment - Summary of the Details of Property and Equipment and Investment Properties Provided (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items]
Related amount	₩ 10,218,165	₩ 10,006,685
Land and buildings [member] | Industrial Bank of Korea [member]
Disclosure of detailed information about property, plant and equipment [line items]
Carrying amount	81,057	13,899
Secured amount	₩ 64,680	₩ 19,100
Related line item	Borrowings	Borrowings
Related amount	₩ 54,900	₩ 6,000
Secured party	Industrial Bank of Korea, etc.	Industrial Bank of Korea, etc.
Land and buildings [member] | Lessee [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Carrying amount	₩ 555,921	₩ 460,166
Secured amount	₩ 64,877	₩ 61,733
Related line item	Deposits	Deposits
Related amount	₩ 55,965	₩ 52,662
Secured party	Lessee	Lessee

X

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard
-URIDate 2023-03-23

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- 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.

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- Definition

The amount of property, plant and equipment pledged as security for liabilities. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2023-01-01
-Paragraph 74
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_74_a&doctype=Standard
-URIDate 2023-03-23

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- Definition

Related amount description in property plant and equipment

+ References

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- Definition

Secured amount in property plan and equipment.

+ References

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+ Details

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- Definition

Secured party.

+ References

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- Details

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- Details

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- Details

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