v3.25.2
Cover
Aug. 01, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 01, 2025
Entity File Number 814-01427
Entity Registrant Name LAFAYETTE SQUARE USA, INC.
Entity Central Index Key 0001849089
Entity Tax Identification Number 87-2807075
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 175 SW 7th St
Entity Address, Address Line Two Unit 2307
Entity Address, City or Town Miami
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33130-2992
City Area Code 786
Local Phone Number 753-7096
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 true