v3.25.1
Cover
Jun. 09, 2025
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 09, 2025
Entity File Number 001-42214
Entity Registrant Name SilverBox Corp IV
Entity Central Index Key 0002015947
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 1250 S. Capital of Texas Highway,
Entity Address, Address Line Two Building 2, Suite 285
Entity Address, City or Town Austin
Entity Address, State or Province TX
Entity Address, Postal Zip Code 78746
City Area Code 512
Local Phone Number 575-3637
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, $0.0001 par value, and one-third of one redeemable warrant [Member]  
Document Information [Line Items]  
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-third of one redeemable warrant
Trading Symbol SBXD.U
Security Exchange Name NYSE
Class A ordinary shares included as part of the units [Member]  
Document Information [Line Items]  
Title of 12(b) Security Class A ordinary shares included as part of the units
Trading Symbol SBXD
Security Exchange Name NYSE
Redeemable warrants included as part of the units, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 [Member]  
Document Information [Line Items]  
Title of 12(b) Security Redeemable warrants included as part of the units, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Trading Symbol SBXD WS
Security Exchange Name NYSE