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Consolidated Subsidiaries - Summary of Changes in Goodwill (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill, Beginning	₩ 99,156	₩ 100,093
Increase	0	1,859
Decrease	0	0
Impairment	0	(2,582)
Others	23	(214)
Goodwill, Ending	99,179	99,156
Acquisition cost
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill, Beginning	101,738	100,093
Increase	0	1,859
Decrease	0	0
Impairment	0	0
Others	23	(214)
Goodwill, Ending	101,761	101,738
Less: Accumulated impairment
Disclosure of reconciliation of changes in goodwill [line items]
Goodwill, Beginning	(2,582)	0
Increase	0	0
Decrease	0	0
Impairment	0	(2,582)
Others	0	0
Goodwill, Ending	₩ (2,582)	₩ (2,582)

X

- Definition

The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Total for all business combinations [member]]

+ References

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- Definition

The amount of goodwill derecognised without having previously been included in a disposal group classified as held for sale. [Refer: Goodwill; Disposal groups classified as held for sale [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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- Definition

The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

+ References

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- Definition

The increase (decrease) in goodwill resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Goodwill]

+ References

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