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Accumulated Other Comprehensive Income and Other Components of Equity - Summary of Other Components of Equity (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Miscellaneous equity [abstract]
Number of treasury shares granted	125,412
Treasury shares, Amount directly reflected in equity	₩ 653	₩ 738

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- References

No definition available.

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- Definition

Number of treasury shares granted.

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No definition available.

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- Definition

The value of treasury shares directly reflected in equity.

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No definition available.

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