| Document and Entity Information | Feb. 08, 2024 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001925309 |
| Document Type | 8-K |
| Document Period End Date | Feb. 08, 2024 |
| Entity Registrant Name | SIXTH STREET LENDING PARTNERS |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 814-01543 |
| Entity Tax Identification Number | 88-1710161 |
| 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 |
| 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 |
