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Document And Entity Information
Jul. 18, 2025
Document Information Line Items  
Entity Central Index Key 0002034267
Document Type S-1
Entity Registrant Name Cantor Equity Partners IV, Inc.
Entity Incorporation, State or Country Code E9
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Amendment Flag false