Earnings (Loss) per Share Attributable to Owners of the Controlling Company - Summary of Basic Earnings per Share (Detail) - KRW (₩)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basic earnings per share [abstract]
Profit (loss) attributable to owners of the Controlling Company for the year	₩ (3,071,564,667,651)	₩ 1,186,182,126,952	₩ (94,852,991,844)
Weighted-average number of common stocks outstanding	357,815,700	357,815,700	357,815,700
Basic loss per share	₩ (8,584)	₩ 3,315	₩ (265)

The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 33
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