Sponsor Officers and Directors Letter Agreement [Member] Sponsor and Members [Member] Officers and Directors [Member] Class B Ordinary Shares [Member] Sponsor [Member] Class B Ordinary Shares Surrender [Member] Offering Price of $10.00 Per Unit [Member] Common Class B [Member] Class B ordinary shares Over-allotment Option [Member] Private Placement Shares [Member] FutureCrest Acquisition Sponsor LLC [Member] Working Capital Loan [Member] Without Over- Allotment [Member] With Over- Allotment [Member] Net tangible book deficit before this offering [Member] Net proceeds from this offering and the sale of the private placement warrants [Member] Plus: Offering costs accrued for or paid in advance, excluded from tangible book value [Member] Less: Deferred underwriting commissions [Member] Less: Over-allotment liability [Member] Less: Amounts paid for redemptions [Member] Ordinary shares outstanding prior to this offering [Member] Ordinary shares forfeited if over-allotment is not exercised [Member] Ordinary shares offered and sale of private placement warrants [Member] Less: Ordinary shares redeemed [Member] Amendment Description Document Type Entity Registrant Name Entity Incorporation, State or Country Code Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Central Index Key Amendment Flag Conflict of Interest, Party [Axis] Security Class [Axis] SPAC Sponsor, Affiliate, or Promoter [Axis] Over-allotment Option [Axis] Redemption Level [Axis] Dilution Source [Axis] SPAC Offering Forepart, Security Holders Have the Opportunity to Redeem Securities [Flag] SPAC Offering Forepart, Security Holder Redemptions Subject to Limitations [Flag] SPAC, Securities Offered, Redemption Rights [Text Block] SPAC Offering Forepart, De-SPAC Consummation Timeframe Description [Text Block] De-SPAC Consummation Timeframe, How Extended [Text Block] SPAC Offering Forepart, De-SPAC Consummation Timeframe De-SPAC Consummation Timeframe Extension, Security Holders Voting or Redemption Rights [Flag] SPAC Offering Forepart, De-SPAC Consummation Timeframe May be Extended [Flag] De-SPAC Consummation Timeframe, Plans if it Fails [Text Block] SPAC Will Solicit Shareholder Approval for De-SPAC Transaction [Flag] De-SPAC Consummation Timeframe, Limitations on Extensions [Text Block] De-SPAC Consummation Timeframe, Duration De-SPAC Consummation Timeframe, Extension Failure, Consequences to Sponsor [Text Block] SPAC, Trust or Escrow Account, Material Terms [Text Block] SPAC, Trust or Escrow Account, Gross Offering Proceeds Placed, Percent SPAC Additional Financing Plans, Impact on Security Holders [Text Block] SPAC, Actual or Potential Material Conflict of Interest, Prospectus Summary [Text Block] Fiduciary Duties to Other Companies, SPAC Officers and Directors [Table Text Block] Conflict of Interest, Description [Text Block] Securities Issued or to be Issued, Shares (in Shares) Securities Issued or to be Issued, Shares Price Paid or to be Paid for Securities, Total Amount (in Dollars) Price Paid or to be Paid for Securities, Total Amount SPAC Offering Forepart, Sponsor Compensation Material Dilution [Flag] SPAC Offering Forepart, Adjusted Net Tangible Book Value Per Share [Table Text Block] Registered Offering Price per Share Registered Offering Price per Share (in Dollars per share) Net Tangible Book Value, Adjusted, per Share Net Tangible Book Value, Adjusted, per Share (in Dollars per share) Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share (in Dollars per share) SPAC Offering Forepart, Actual or Material Conflict of Interest [Flag] SPAC Offering Forepart, Sponsor Compensation [Table Text Block] SPAC Sponsor Name SPAC Sponsor Form of Organization SPAC Sponsor Business, General Character [Text Block] SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Table Text Block] SPAC Sponsor, Terms That Would Result in Earlier Expiration of Restrictions [Text Block] SPAC Prospectus Summary, Sponsor Compensation [Table Text Block] Price Paid or to be Paid for Securities, Per Share SPAC, Adjusted Net Tangible Book Value Per Share with Sources of Dilution [Table Text Block] Net Tangible Book Value, Pre-transaction, Per Share (in Dollars per share) Net Tangible Book Value Amount of Dilution, Per Share (in Dollars per share) Net Tangible Book Value Net Tangible Book Value Adjusted Number of Shares Used to Determine Net Tangible Book Value Pre-transaction Per Share (in Shares) Number of Shares Used to Determine Net Tangible Book Value Adjusted (in Shares) SPAC Officers and Directors [Member] Over-allotment Option Exercised [Member] Redemption at 25 Percent of Maximum [Member] Redemption at 50 Percent of Maximum [Member] Redemption at 75 Percent of Maximum [Member] Redemption at 100 Percent of Maximum [Member] Over-allotment Option Not Exercised [Member] Founder Shares [Member] No Redemption [Member] Public Units [Member] All Conflict of Interest Parties [Member] SPAC Sponsor, Conflicts of Interest [Table] SPAC Sponsor, Conflict of Interest [Line Items] All Security Classes [Member] All SPAC Sponsors, Affiliates, or Promoters [Member] SPAC Offering Forepart, Sponsor Compensation [Table] SPAC Offering Forepart, Sponsor Compensation [Line Items] All Over-allotment Options [Member] All Redemption Levels [Member] SPAC Offering Forepart, Adjusted Net Tangible Book Value Per Share [Table] SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items] SPAC Sponsor [Table] SPAC Sponsor [Line Items] SPAC Prospectus Summary, Sponsor Compensation [Table] SPAC Prospectus Summary, Sponsor Compensation [Line Items] All Dilution Sources [Member] SPAC, Adjusted Net Tangible Book Value Per Share with Sources of Dilution [Table] Net Tangible Book Value Per Share [Line Items] SPAC Offering Forepart, Actual or Material Conflict of Interest [Flag] Private Placement Shares Member Entity Small Business Net Tangible Book Value Amount of Dilution, Per Share SPAC Sponsor Business, General Character [Text Block] De-SPAC Consummation Timeframe, Limitations on Extensions [Text Block] Less Overallotment Liability Member Net Tangible Book Deficit Before This Offering Member SPAC Prospectus Summary, Sponsor Compensation [Table Text Block] SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Abstract] Net Tangible Book Value, Pre-transaction, Per Share Common Class B [Member] Net Tangible Book Value SPAC Offering Forepart, De-SPAC Consummation Timeframe May be Extended [Flag] Securities Issued or to be Issued, Shares Public Units [Member] Without Over Allotment Member Net Tangible Book Value, Adjusted, per Share With Over Allotment Member Plus Offering Costs Accrued For Or Paid In Advance Excluded From Tangible Book Value Member SPAC Offering Forepart, Sponsor Compensation [Table Text Block] SPAC Sponsor Form of Organization Sponsor Officers And Directors Letter Agreement Member SPAC Offering Forepart, De-SPAC Consummation Timeframe Description [Text Block] Number of Shares Used to Determine Net Tangible Book Value Pre-transaction Per Share SPAC Sponsor, Terms That Would Result in Earlier Expiration of Restrictions [Text Block] SPAC, Securities Offered, Redemption Rights [Text Block] Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share Over-allotment Option Not Exercised [Member] Over-allotment Option Exercised [Member] Entity Ex Transition Period SPAC Will Solicit Shareholder Approval for De-SPAC Transaction [Flag] Price Paid or to be Paid for Securities, Per Share Price Paid or to be Paid for Securities, Total Amount SPAC Offering Forepart, Sponsor Compensation [Abstract] SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Abstract] Sponsor And Members Member SPAC Offering Prospectus Summary [Line Items] SPAC, Trust or Escrow Account, Gross Offering Proceeds Placed, Percent SPAC, Trust or Escrow Account, Material Terms [Text Block] SPAC Offering Forepart, De-SPAC Consummation Timeframe Entity Emerging Growth Company Class BOrdinary Shares Surrender Member Net Proceeds From This Offering And The Sale Of The Private Placement Warrants Member Redemption at 25 Percent of Maximum [Member] Sponsor Member Conflict of Interest, Description [Text Block] Number of Shares Used to Determine Net Tangible Book Value Adjusted Ordinary Shares Offered And Sale Of Private Placement Warrants Member No Redemption [Member] Future Crest Acquisition Sponsor LLCMember SPAC Offering Forepart, Security Holder Redemptions Subject to Limitations [Flag] De-SPAC Consummation Timeframe, Plans if it Fails [Text Block] Overallotment Option Member Founder Shares [Member] Officers And Directors Member Less Amounts Paid For Redemptions Member SPAC Officers and Directors [Member] Class BOrdinary Shares Member Ordinary Shares Forfeited If Overallotment Is Not Exercised Member De-SPAC Consummation Timeframe Extension, Security Holders Voting or Redemption Rights [Flag] Less Ordinary Shares Redeemed Member SPAC Offering Forepart, Adjusted Net Tangible Book Value Per Share [Table Text Block] Redemption at 100 Percent of Maximum [Member] Entity Incorporation, State or Country Code Registered Offering Price per Share Document Type De-SPAC Consummation Timeframe, Extension Failure, Consequences to Sponsor [Text Block] Less Deferred Underwriting Commissions Member SPAC, Actual or Potential Material Conflict of Interest, Prospectus Summary [Text Block] Amendment Flag SPAC Sponsor Name SPAC Prospectus Summary, Sponsor Compensation [Abstract] De-SPAC Consummation Timeframe, How Extended [Text Block] Working Capital Loan Member Entity Central Index Key Entity Filer Category Redemption at 75 Percent of Maximum [Member] Amendment Description Net Tangible Book Value Adjusted Redemption at 50 Percent of Maximum [Member] SPAC Offering Forepart, Sponsor Compensation Material Dilution [Flag] Offering Price Of1000 Per Unit Member Ordinary Shares Outstanding Prior To This Offering Member Fiduciary Duties to Other Companies, SPAC Officers and Directors [Table Text Block] SPAC Sponsor [Abstract] SPAC Additional Financing Plans, Impact on Security Holders [Text Block] Entity Registrant Name SPAC Offering Forepart, Security Holders Have the Opportunity to Redeem Securities [Flag] SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Table Text Block] De-SPAC Consummation Timeframe, Duration SPAC, Adjusted Net Tangible Book Value Per Share with Sources of Dilution [Table Text Block]