Document and Entity Information - USD ($)	9 Months Ended
	Dec. 31, 2022	Feb. 17, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Registrant Name	Sixth Street Lending Partners
Entity Central Index Key	0001925309
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Document Annual Report	true
Document Transition Report	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity File Number	814-01543
Entity Tax Identification Number	88-1710161
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2100 McKinney Avenue
Entity Address, Address Line Two	Suite 1500
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75201
City Area Code	469
Local Phone Number	621-3001
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		21,882,028
Title of 12(g) Security	Common shares of beneficial interest, par value $0.001 per share
ICFR Auditor Attestation Flag	true
Auditor Name	KPMG LLP
Auditor Firm ID	185
Auditor Location	New York, New York