| N-2 - USD ($) | Mar. 11, 2024 | Mar. 06, 2024 |
| Cover [Abstract] | | |
| Entity Central Index Key | | 0001572694 |
| Amendment Flag | | false |
| Securities Act File Number | | 814-00998 |
| Document Type | | 8-K |
| Entity Registrant Name | | GOLDMAN SACHS BDC, INC. |
| Entity Address, Address Line One | | 200 West Street |
| Entity Address, City or Town | | New York |
| Entity Address, State or Province | | NY |
| Entity Address, Postal Zip Code | | 10282 |
| City Area Code | | (312) |
| Local Phone Number | | 655-4419 |
| Entity Emerging Growth Company | | false |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | | |
| Long Term Debt [Table Text Block] | On March 11, 2024, the Company and Computershare Trust Company, National Association (as successor to Wells Fargo Bank, National Association, the “Trustee”), entered into the Third Supplemental Indenture, dated March 11, 2024, between the Company and the Trustee (the “Third Supplemental Indenture”), which supplements that certain Base Indenture, dated February 10, 2020, between the Company and the Trustee (as may be further amended, supplemented or otherwise modified from time to time, the “Base Indenture” and, together with the Third Supplemental Indenture, the “Indenture”). The Third Supplemental Indenture relates to the Company’s issuance of $400,000,000 aggregate principal amount of its 6.375 | On March 6, 2024, Goldman Sachs BDC, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) by and among the Company, Goldman Sachs Asset Management, L.P. and BofA Securities, Inc., as representative of the several underwriters named in Schedule A thereto (collectively, the “Underwriters”), in connection with the issuance and sale of $400,000,000 aggregate principal amount of the Company’s 6.375% notes due 2027 (the “Offering”). |
| Long Term Debt, Principal | $ 400,000,000 | $ 400,000,000 |
| Long Term Debt, Structuring [Text Block] | The Notes will mature on March 11, 2027 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the Indenture. The Notes bear interest at a rate of 6.375% per year payable semi-annually on March 11 and September 11 of each year, commencing on September 11, 2024. The Notes are general unsecured obligations of the Company that rank senior in right of payment to all of the Company’s future indebtedness or other obligations that are expressly subordinated, or junior, in right of payment to the Notes, rank pari passu | |
| Long Term Debt, Dividends and Covenants [Text Block] | The Indenture contains certain covenants, including covenants requiring the Company to comply with the asset coverage requirements of Section 18(a)(1)(A) as modified by Section 61(a) of the Investment Company Act of 1940, as amended, whether or not it is subject to those requirements, and to provide financial information to the holders of the Notes and the Trustee if the Company is no longer subject to the reporting requirements under the Securities Exchange Act of 1934, as amended. These covenants are subject to important limitations and exceptions that are described in the Indenture. | |
