N-2 $ in Millions |
Oct. 01, 2026
USD ($)
|
|---|---|
| Cover [Abstract] | |
| Entity Central Index Key | 0001653384 |
| Amendment Flag | false |
| Securities Act File Number | 814-01180 |
| Document Type | 8-K |
| Entity Registrant Name | Runway Growth Finance Corp. |
| Entity Address, Address Line One | 205 N. Michigan Ave. |
| Entity Address, Address Line Two | Suite 4200 |
| Entity Address, City or Town | Chicago |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60601 |
| City Area Code | (312) |
| Local Phone Number | 698-6902 |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Capital Stock, Long-Term Debt, and Other Securities [Abstract] | |
| Long Term Debt, Principal | $ 46,329,125 |
| Long Term Debt, Structuring [Text Block] | The Notes will mature on October 1, 2031, unless previously redeemed or repurchased in accordance with their terms. The interest rate of the Notes is 7.75% per year and will be paid quarterly in arrears on March 1, June 1, September 1 and December 1 of each year, beginning on December 1, 2026. The Notes are the Company’s direct unsecured obligations and rank pari passu with the Company’s existing and future unsecured, unsubordinated indebtedness, including the Company’s 7.50% Notes due 2027, 7.51% Series 2025A Senior Notes due 2028, 7.00% Notes due 2029, 7.25% Notes due 2031 and the SWK 2027 Notes (as defined below); senior to any of the Company’s future indebtedness that expressly provides it is subordinated to the Notes; effectively subordinated to all of the Company’s existing and future secured indebtedness (including indebtedness that is initially unsecured to which the Company subsequently grants security), to the extent of the value of the assets securing such indebtedness, including, without limitation, borrowings under the Company’s Credit Agreement with KeyBank National Association (the “Credit Facility”); and structurally subordinated to all existing and future indebtedness and other obligations of any of the Company’s existing or future subsidiaries, financing vehicles or similar facilities, including the Credit Facility. |