| Cover | Mar. 30, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 30, 2023 |
| Entity File Number | 814-01563 |
| Entity Registrant Name | Brightwood Capital Corporation I |
| Entity Central Index Key | 0001895316 |
| Entity Tax Identification Number | 88-1977273 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 810 Seventh Avenue |
| Entity Address, Address Line Two | 26th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10019 |
| City Area Code | 646 |
| Local Phone Number | 957-9525 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
