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Share-based Payments - Summary of Details of Share-based Payments (Detail) - KRW (₩)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Grant date	12th grant August 2, 2018
Vesting conditions	Service condition: 1 year Non-marketperformance condition: achievement of performance
Fair value per option	₩ 28,350
Total compensation costs	₩ 5,956,000,000	₩ 6,483,000,000

X

- Definition

The date on which share-based payment arrangements are granted. [Refer: Share-based payment arrangements [member]]

+ References

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X

- Definition

The description of the vesting requirements for a type of share-based payment arrangement that existed at any time during the period. An entity with substantially similar types of share-based payment arrangements may aggregate this information. [Refer: Share-based payment arrangements [member]]

+ References

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- References

No definition available.

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X

- Definition

The amount of expense from share-based payment transactions with employees.

+ References

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X

- Definition

The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]]

+ References

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