Net Increase (Decrease) in Net Assets per Common Share - Narrative (Details)			6 Months Ended
	Oct. 30, 2020	Aug. 03, 2020	Dec. 31, 2023
5.50% Preferred Stock
Class of Stock [Line Items]
Dividend rate		5.50%	5.50%
6.50% Preferred Stock
Class of Stock [Line Items]
Dividend rate	6.50%	6.50%