Income Tax Expense - Additional Information (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Abstract]
Temporary difference related to investments in subsidiaries not recognized as deferred tax assets	₩ 22,409	₩ 15,508

Temporary differences associated with investments in subsidiaries for which no deferred tax asset is recognised.

No definition available.

Name:	grvy_TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesForWhichNoDeferredTaxAssetIsRecognised
Namespace Prefix:	grvy_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant