Financial Instruments [Abstract] Financial Instruments [Abstract] Financial Instruments [Abstract] Classes of financial liabilities [axis] Classes of financial liabilities [axis] Miscellaneous expense Adjustments For Miscellaneous Income (Expense) Adjustments For Miscellaneous Income (Expense) Cover [Abstract] Disclosure of detailed information about business combination [line items] Disclosure of detailed information about business combination [line items] Earnings per share: Earnings per share [abstract] Disposal of financial assets at fair value through profit or loss Proceeds From Financial Assets At Fair Value Through Profit Or Loss Proceeds From Financial Assets At Fair Value Through Profit Or Loss Total current liabilities Current liabilities iGaming Segment iGaming Segment [Member] iGaming Segment Earnings per share Disclosure of earnings per share [text block] Statement of changes in equity [abstract] Schedule of financial liabilities Disclosure of financial liabilities [text block] Financial assets measured at amortized cost Financial assets at amortized cost Financial assets at amortised cost, category [member] Right-of-use assets Changes in right-of-use assets [abstract] Revenue that was included in contract liability balance at beginning of period Revenue that was included in contract liability balance at beginning of period Financial assets Non-current financial assets at fair value through profit or loss Disclosure of financial assets [table] Disclosure of financial assets [table] Classes of intangible assets and goodwill [axis] Classes of intangible assets and goodwill [axis] DoubleDown Interactive Co., Ltd. Comprehensive income, attributable to owners of parent Schedule of net gains of losses by category of financial instruments Disclosure Of Detailed Information About Fair Value Measurement Of Financial Assets And Liabilities, Gains (Losses) [Table Text Block] Disclosure Of Detailed Information About Fair Value Measurement Of Financial Assets And Liabilities, Gains (Losses) Geographical areas [domain] Geographical areas [domain] Products and services [axis] Products and services [axis] International-other Other International Countries [Member] Other International Countries Weighted average cost of capital Weighted average cost of capital, measurement input [member] Accounts payable and accrued expenses Amounts payable, related party transactions Purchased technology Technology-based intangible assets [member] Disclosure of disaggregation of revenue from contracts with customers [abstract] Disclosure of disaggregation of revenue from contracts with customers [table] Disclosure of 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[domain] Trademarks Trademarks [Member] Trademarks Royalty agreement, term Royalty Agreement, Term Royalty Agreement, Term Lease liabilities Lease Liabilities Recognised as of Acquisition Date Lease Liabilities Recognised as of Acquisition Date Share Capital, Reserves And Other Equity Interest [Abstract] Share Capital, Reserves And Other Equity Interest [Abstract] Share Capital, Reserves And Other Equity Interest [Abstract] General Information [Abstract] General Information [Abstract] General Information [Abstract] Other long-term employee benefits Adjustments for increase (decrease) in employee benefit liabilities Maximum Maximum [Member] Fair value of plan assets Plan assets [member] Disclosure of financial liabilities [line items] Disclosure of financial liabilities [line items] Bottom of range Bottom of range [member] DoubleDown Interactive Co., Ltd. DoubleDown Interactive Co., Ltd. [Member] DoubleDown Interactive Co., Ltd. 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noncurrent assets by geographical location Disclosure Of Revenue and Non-Current Assets By Geographical Location [Table Text Block] Disclosure Of Revenue and Non-Current Assets By Geographical Location Other comprehensive income (loss): Other comprehensive income [abstract] Basic (in dollars per share) Basic earnings per share (in dollars per share) Basic earnings (loss) per share Total Total Share Capital And Share Premium [Member] Total Share Capital And Share Premium Classes of financial liabilities [domain] Classes of financial liabilities [domain] General information Disclosure of general information about financial statements [text block] Minimum Minimum [Member] Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] Employee Benefits [Abstract] Employee Benefits [Abstract] Employee Benefits [Abstract] Cash flows from financing activities Cash flows from (used in) financing activities [abstract] Unrealized gain on foreign currency Adjustments For Unrealised Foreign Exchange Gains Adjustments For Unrealised Foreign Exchange Gains United Kingdom UNITED KINGDOM Schedule of changes in share capital Disclosure Of Detailed Information About Share Capital [Table Text Block] Disclosure Of Detailed Information About Share Capital Profit for the interim period Profit for the interim period Profit (loss) Timing of transfer of goods or services [domain] Timing of transfer of goods or services [domain] Social casino game Social casino game [Member] Social casino game Identifiable Assets and liabilities, net Identifiable assets acquired (liabilities assumed) Contract liabilities Adjustments for increase (decrease) in contract liabilities Percentage of ownership Proportion of ownership interest in subsidiary Number of real-money gaming sites Number Of Real-Money Gaming Sites Number Of Real-Money Gaming Sites 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[Abstract] Accounting Policies, Changes In Accounting Estimates and Errors [Abstract] Intangible Assets Including Goodwill [Abstract] Intangible Assets and Goodwill [Abstract] Disclosure of net defined benefit liability (asset) [line items] Disclosure of net defined benefit liability (asset) [line items] Disclosure of reconciliation of changes in intangible assets and goodwill [line items] Disclosure of reconciliation of changes in intangible assets and goodwill [line items] Average effective tax rate Average effective tax rate Financial assets at amortized cost Financial Assets At Amortised Cost [Abstract] Financial Assets At Amortised Cost Accumulated comprehensive loss Accumulated other comprehensive income Useful life of intangible assets Useful life measured as period of time, intangible assets other than goodwill Schedule of valuation techniques and inputs for fair value measurements Disclosure of significant unobservable inputs used in fair value measurement of assets [text block] Intangible assets and goodwill Disclosure of intangible assets [text block] Disclosure of operating segments [line items] Disclosure of operating segments [line items] Recurring fair value measurement Recurring fair value measurement [member] Current liabilities Current financial liabilities Operating profit Profit (loss) from operating activities Income taxes paid Income taxes paid (refund), classified as operating activities Acquisitions Additions to right-of-use assets Finance cost Finance costs Schedule of transactions between related parties Disclosure of transactions between related parties [text block] Schedule of net defined benefit liability Disclosure of net defined benefit liability (asset) [text block] Interest income Adjustments for interest income Interest expense Interest expense: Interest expense Cash flows from investing activities Cash flows from (used in) investing activities [abstract] DoubleDown Interactive Co., Ltd. Profit (loss), attributable to owners of parent Repayment of lease liabilities Payments of lease liabilities, classified as financing activities Germany GERMANY Long-term borrowings with related party Non-current portion of non-current borrowings Net cash (outflow) from financing activities  Cash flows from (used in) financing activities Non-current lease liabilities Non-current lease liabilities Deferred tax liabilities Deferred tax liabilities recognised as of acquisition date Geographical areas [axis] Geographical areas [axis] Schedule of quantitative information about right-of-use assets Disclosure of quantitative information about right-of-use assets [text block] Borrowings [abstract] Equity Equity [abstract] Total current assets Current assets Gain on foreign currency transaction Foreign exchange gain Business combinations [domain] Business combinations [domain] Non-current liabilities Non-current financial liabilities Korea KOREA, REPUBLIC OF Products and services [domain] Products and services [domain] Classification of operating expenses by nature Disclosure of expenses by nature [text block] Categories of financial assets [domain] Categories of financial assets [domain] Number of shares authorized (in shares) Number of shares authorised Disclosure of transactions between related parties [table] Disclosure of transactions between related parties [table] Other non-current assets Adjustments For Decrease (Increase) In Other Noncurrent Assets Adjustments For Decrease (Increase) In Other Noncurrent Assets Liabilities and equity Equity and liabilities [abstract] Entity Central Index Key Entity Central Index Key Disclosure of fair value measurement of assets [table] Disclosure of fair value measurement of assets [table] Segments [axis] Segments [axis] Subsidiaries [axis] Subsidiaries [axis] Other current and non-current liabilities Adjustments For Increase (Decrease) In Other Noncurrent Liabilities Adjustments For Increase (Decrease) In Other Noncurrent Liabilities Schedule of quantitative information about lease liabilities Disclosure Of Quantitative Information About Lease Liabilities [Table Text Block] Disclosure Of Quantitative Information About Lease Liabilities Depreciation Depreciation of right-of-use assets Depreciation, right-of-use assets Property and equipment, net Property, plant and equipment Borrowings, interest rate Borrowings, interest rate Categories of related parties [domain] Categories of related parties [domain] Long-term borrowings with related party Long-term borrowings [member] Non - controlling interests Non-controlling interests [member] Schedule of operating expense by nature Disclosure Of Detailed Information About Operating Expense By Nature [Table Text Block] Disclosure Of Detailed Information About Operating Expense By Nature Total Expenses, by nature Financial liabilities at amortized cost Financial liabilities at amortized cost [Abstract] Financial liabilities at amortized cost WHOW Games GmbH WHOW Games GmbH [Member] WHOW Games GmbH Categories of related parties [axis] Categories of related parties [axis] Disclosure of subsidiaries [table] Disclosure of subsidiaries [table] Leases [Table] Leases [Table] Leases [Table] Equity attributable to DoubleDown Interactive Co., Ltd. Equity attributable to owners of parent Advertising expenses Advertising expense Statement of changes in equity [table] Statement of changes in equity [table] Comprehensive income (loss) for the interim period Comprehensive income [abstract] Cash and cash equivalents Cash and cash equivalents at beginning of the interim period Cash and cash equivalents at end of the interim period Cash and cash equivalents Accrued income Accrued Income [Member] Accrued Income Short-term investments Short-term investments, classified as cash equivalents Level 3 Level 3 of fair value hierarchy [member] Gain on valuation of financial assets and liabilities Adjustments For Increase In Financial Assets Measured At Fair Value Through Profit Or Loss Adjustments For Increase In Financial Assets Measured At Fair Value Through Profit Or Loss Gain on valuation of financial assets Gain on Valuation of Financial Assets Gain on Valuation of Financial Assets Total liabilities and equity Equity and liabilities Noncurrent assets Noncurrent Assets [Member] Noncurrent Assets Deferred payment Contingent consideration recognised as of acquisition date Deferred tax assets Deferred tax assets recognised as of acquisition date Unobservable inputs [domain] Unobservable inputs [domain] At a point in time Goods or services transferred at point in time [member] Accounts receivable, net Trade receivables [member] Number of shares outstanding (in shares) Common shares (in shares) Number of shares outstanding Disclosure of subsidiaries [line items] Disclosure of subsidiaries [line items] Market-based fair value approach Market approach [member] Present value of defined benefit obligations Present value of defined benefit obligation [member] Loss on valuation of financial assets and liabilities Adjustments for Decrease in Financial Assets Measured at Fair Value Through Profit or Loss Adjustments for Decrease in Financial Assets Measured at Fair Value Through Profit or Loss Disclosure of net defined benefit liability (asset) [table] Disclosure of net defined benefit liability (asset) [table] Effect of exchange rate changes on cash and cash equivalents Effect of exchange rate changes on cash and cash equivalents Amendment Flag Amendment Flag Categories of financial assets [axis] Categories of financial assets [axis] Cash flows from operating activities Cash flows from (used in) operating activities [abstract] Entity Registrant Name Entity Registrant Name Interest expense relating to lease liabilities Interest expenses Interest expense on lease liabilities Borrowings by name [domain] Borrowings by name [domain] Current assets Current Assets [Member] Current Assets DoubleU Games DoubleU Games [Member] DoubleU Games Acquisition-related costs Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination Categories of financial liabilities [axis] Categories of financial liabilities [axis] Right-of-use assets Right-of-use Assets, Net Recognised as of Acquisition Date Right-of-use Assets, Net Recognised as of Acquisition Date Total operating expenses Operating expense Personnel expenses Employee benefits expense Current assets Current financial assets Leases [Line Items] Leases [Line Items] Leases [Line Items] Income tax expense Tax expense (income) Schedule of segment information Disclosure of operating segments [text block] iGaming iGaming [Member] iGaming Amount modified to be contingent upon employment Performance-Based Incentive Plan, Amount Modified To Be Contingent Upon Employment Performance-Based Incentive Plan, Amount Modified To Be Contingent Upon Employment Number of depositary shares per common share (in shares) Number of Depositary Shares Per Common Share Number of Depositary Shares Per Common Share DoubleDown Interactive LLC DoubleDown Interactive LLC [Member] DoubleDown Interactive LLC Related party transactions Disclosure of related party [text block] Non-current assets Non-current financial assets Retirement benefit plan Disclosure of employee benefits [text block] Interest expense Adjustments for interest expense Accrued expenses Accrued Liabilities1 [Member] Accrued Liabilities1 Schedule of disaggregation of revenue from contracts with customers Disclosure of disaggregation of revenue from contracts with customers [text block] Profit or loss [abstract] Indemnification agreement, maximum limit of losses for every 12-month period Indemnification Agreement, Maximum Limit Of Losses For Every 12-Month Period Indemnification Agreement, Maximum Limit Of Losses For Every 12-Month Period Accounts receivable, net Adjustments for decrease (increase) in trade and other receivables Weighted average shares outstanding - basic (in shares) Weighted average number of ordinary shares used in calculating basic earnings per share Long-term borrowings 4.6% Senior notes with related party Borrowings Non-current lease liabilities Lease Liabilities, Noncurrent [Member] Lease Liabilities, Noncurrent Top of range Top of range [member] Non-controlling interests Comprehensive income, attributable to non-controlling interests Accounts receivable Accounts Receivable Recognised as of Acquisition Date Accounts Receivable Recognised as of Acquisition Date WHOW Games WHOW Games [Member] WHOW Games Performance-based incentive plan, maximum employee amount Performance-Based Incentive Plan, Maximum Employee Amount Performance-Based Incentive Plan, Maximum Employee Amount Current lease liabilities Current lease liabilities Cash generated from operations Cash flows from (used in) operations Business Combination [Abstract] Disclosure of detailed information about business combination [Abstract] Share premium Share premium Financial assets at fair value through profit or loss Financial assets at fair value through profit or loss [abstract] Depreciation and amortization Depreciation and amortisation expense Research and development Research and development expense Disclosure of transactions between related parties [line items] Disclosure of transactions between related parties [line items] Valuation techniques used in fair value measurement [domain] Valuation techniques used in fair value measurement [domain] Property and equipment Property, plant and equipment recognised as of acquisition date Current lease liabilities Lease Liabilities, Current [Member] Lease Liabilities, Current Loss on valuation of financial liabilities Loss On Valuation Of Financial Liabilities Loss On Valuation Of Financial Liabilities Working capital adjustments: Working Capital Adjustments [Abstract] Working Capital Adjustments Short-term and Long-term borrowings Disclosure of borrowings [text block] Revenue Revenue from contracts with customers Profit before income tax Profit before income tax: Profit (loss) before tax Over time Goods or services transferred over time [member] General and administrative General and administrative expense Dilutive effect of all instruments on weighted average number of ordinary shares Dilutive effect of all instruments on weighted average number of ordinary shares Measurement [axis] Measurement [axis] Intangible assets Identifiable intangible assets recognised as of acquisition date Current portion of borrowings with related party Borrowings With Related Party, Current [Member] Borrowings With Related Party, Current Royalty agreement, percentage of revenue for proprietary assets Royalty Agreement, Percentage of Revenue for Proprietary Assets Royalty Agreement, Percentage of Revenue for Proprietary Assets Provision for severance benefits Adjustments For Increase (Decrease) In Severance Benefits Adjustments For Increase (Decrease) In Severance Benefits Share capital Issued capital [member] Lease [Abstract] Lease [Abstract] Leases [Abstract] Purchase of property and equipment Purchase of property, plant and equipment, classified as investing activities Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Other expenses Other expenses, by nature Retained earnings Retained earnings [member] Income taxes payable Income Tax Payable Recognised as of Acquisition Date Income Tax Payable Recognised as of Acquisition Date Profit applicable to DoubleDown Interactive Co., Ltd. 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