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Cover
Sep. 29, 2025
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 29, 2025
Entity File Number 001-42867
Entity Registrant Name FutureCrest Acquisition Corp.
Entity Central Index Key 0002074697
Entity Tax Identification Number 98-1871328
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 150 East 52nd Street
Entity Address, Address Line Two 3rd Floor
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10022
City Area Code 732
Local Phone Number 698-8220
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one Class A ordinary share and one-quarter of one redeemable warrant  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-quarter of one redeemable warrant
Trading Symbol FCRS.U
Security Exchange Name NYSE
Class A ordinary shares, par value $0.0001 per share  
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share
Trading Symbol FCRS
Security Exchange Name NYSE
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share  
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol FCRS WS
Security Exchange Name NYSE