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Share Capital and Capital Surplus - Summary of Capital Surplus (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Statement of changes in equity [abstract]
Share premium	₩ 463,825	₩ 463,825
Gain on disposal of treasury shares	808,994	808,994
Other capital surplus	421,753	385,531
Capital surplus	₩ 1,694,572	₩ 1,658,350

X

- Definition

The amount received or receivable from the issuance of the entity's shares in excess of nominal value and amounts received from other transactions involving the entity's stock or stockholders.

+ References

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- Definition

The amount received or receivable from the issuance of the entity's shares in excess of nominal value.

+ References

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- Definition

Gain on Disposal of Treasury Share

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- Definition

Other capital surplus (deficit).

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