v3.26.3
Cover
Oct. 07, 2026
Sep. 25, 2026
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Oct. 07, 2026  
Entity Registrant Name CRESTLINE LENDING SOLUTIONS, LLC  
Entity Incorporation, State or Country Code DE  
Securities Act File Number 000-56777  
Entity Tax Identification Number 99-3640580  
Entity Address, Address Line One 201 Main Street  
Entity Address, Address Line Two Suite 2100  
Entity Address, City or Town Fort Worth  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 76102  
City Area Code   817
Local Phone Number   339-7600
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Central Index Key 0002035713  
Amendment Flag false