| N-2 | Oct. 10, 2024 USD ($) |
| Cover [Abstract] | |
| Entity Central Index Key | 0001544206 |
| Amendment Flag | false |
| Securities Act File Number | 814-00995 |
| Document Type | 8-K |
| Entity Registrant Name | Carlyle Secured Lending, Inc. |
| Entity Address, Address Line One | One Vanderbilt Avenue |
| Entity Address, Address Line Two | Suite 3400 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10017 |
| City Area Code | (212) |
| Local Phone Number | 813-4900 |
| Entity Emerging Growth Company | false |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Long Term Debt [Table Text Block] | On October 10, 2024, Carlyle Secured Lending, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) by and among the Company, Carlyle Global Credit Investment Management L.L.C. (the “Adviser”), and Carlyle Global Credit Administration L.L.C. (the “Administrator”), on the one hand, and J.P. Morgan Securities LLC, Barclays Capital Inc., BofA Securities, Inc. and Morgan Stanley & Co. LLC, as representatives of the several underwriters named in Schedule I thereto, on the other hand, in connection with the issuance and sale of $300,000,000 aggregate principal amount of the Company’s 6.750% Notes due 2030 (the “Notes” and the issuance and sale of the Notes, the “Offering”). The closing of the Offering is expected to occur on October 18, 2024, subject to customary closing conditions. The Underwriting Agreement includes customary representations, warranties, and covenants by the Company, the Adviser, and the Administrator. It also provides for customary indemnification by each of the Company, the Adviser, the Administrator, and the underwriters against certain liabilities and customary contribution provisions in respect of those liabilities. The Offering was made pursuant to the Company’s effective shelf registration statement on Form N-2 No. 333-278993) 8-K The foregoing description of the Underwriting Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Underwriting Agreement filed as an exhibit hereto and incorporated by reference herein. |
| Long Term Debt, Title [Text Block] | 6.750% Notes due 2030 |
| Long Term Debt, Principal | $ 300,000,000 |
| Long Term Debt, Dividends and Covenants [Text Block] | The Underwriting Agreement includes customary representations, warranties, and covenants by the Company, the Adviser, and the Administrator. It also provides for customary indemnification by each of the Company, the Adviser, the Administrator, and the underwriters against certain liabilities and customary contribution provisions in respect of those liabilities. |
