Cover - shares	3 Months Ended
	Mar. 31, 2026	May 13, 2026
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Transition Report	false
Securities Act File Number	000-56777
Entity Registrant Name	Crestline Lending Solutions, LLC
Entity Incorporation, State or Country Code	DE
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		18,388,592
Entity Central Index Key	0002035713
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Amendment Flag	false
Document Fiscal Year Focus	2026