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Including Discontinued Operation [Abstract] Risk-free rate Measurement Input, Risk Free Interest Rate [Member] Deferred revenue (Beginning balance) Deferred revenue (Ending balance) Contract with Customer, Liability All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Purchase price per share (in dollars per share) Sale of Stock, Price Per Share Treasury stock at cost (4.6 million and 4.7 million shares held as of March 31, 2026 and December 31, 2025, respectively) Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Follow On Offering Trading Plan Post Convesion [Member] Follow On Offering Trading Plan Post Convesion Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Foreign currency remeasurement (gains) losses Realized Gain (Loss), Foreign Currency Transaction, before Tax Circle Internet Group Inc Circle Internet Group Inc [Member] Circle Internet Group Inc Weighted-average discount rates (in percent) Operating Lease, Weighted Average Discount Rate, Percent Summary of Outstanding Stock Options Activities Share-Based Payment Arrangement, Option, Activity [Table Text Block] Basic (in shares) Weighted-average common shares – basic (in shares) Weighted Average Number of Shares Outstanding, Basic Warrant liability Warrants and Rights Outstanding Schedule of Net Income Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Options exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Subsequent Events [Abstract] Debt Disclosure [Abstract] Scenario [Domain] Scenario [Domain] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par or stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Income tax receivable Income Taxes Receivable, Current Crypto Asset, Holding [Table] Crypto Asset, Holding [Table] Use of Estimates Use of Estimates, Policy [Policy Text Block] Pre-tax change – Unrealized (loss) gain on convertible notes – credit risk adjustment Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, before Tax, after Reclassification Adjustment Upward adjustments Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount Subsequent events Subsequent Events [Text Block] Foreign currency translation adjustment, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Options forfeited, Weighted average exercise price (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Share approved for reservation exercise period (years) Share Approved For Reservation, Term Share Approved For Reservation, Term Class of warrants or right number of warrants exercise (in shares) Class Of Warrants Or Right Number Of Warrants Exercise Class Of Warrants Or Right Number Of Warrants Exercise Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Common Stock Available For Future Issuance Under Stock Award Plan Common Stock Available For Future Issuance Under Stock Award Plan [Member] Common Stock Available For Future Issuance Under Stock Award Plan Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Fair Value Option, Type Of Risk [Axis] Fair Value Option, Type Of Risk [Axis] Fair Value Option, Type Of Risk Summary of Restricted Stock Units Activities Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member]