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Investments - Summary of Listing of PSSL's Individual Investments (Parenthetical) (Details)
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2024
Investment, Identifier [Axis]: First Lien Secured Debt - 1,330.4%    
Schedule of Investments [Line Items]    
Investment owned, percent of liabilities in excess of other assets 1347.50%  
Investment, Identifier [Axis]: Related Party PSSL First Lien Secured Debt - 1,404.5%%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets   1404.50%
Investment, Identifier [Axis]: Related Party PSSL, Cash and Cash Equivalents - 106.0%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets   106.00%
Investment, Identifier [Axis]: Related Party PSSL, Cash and Cash Equivalents - 133.2%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 133.20%  
Investment, Identifier [Axis]: Related Party PSSL, Equity - 100.0%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 100.00% 100.00%
Investment, Identifier [Axis]: Related Party PSSL, Equity Securities - 10.5%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets   10.50%
Investment, Identifier [Axis]: Related Party PSSL, Equity Securities - 3.9%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 3.90%  
Investment, Identifier [Axis]: Related Party PSSL, Liabilities in Excess of Other Assets — (1,384.6)%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 1384.60%  
Investment, Identifier [Axis]: Related Party PSSL, Liabilities in Excess of Other Assets — (1,421.0)%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets   1421.00%
Investment, Identifier [Axis]: Related Party PSSL, Total Investments - 1,351.4%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 1351.40%  
Investment, Identifier [Axis]: Related Party PSSL, Total Investments - 1,415.0%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets   1415.00%
Investment, Identifier [Axis]: Related Party PSSL, Total Investments and Cash Equivalents —1,484.6%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets 1484.60%  
Investment, Identifier [Axis]: Related Party PSSL, Total Investments and Cash Equivalents —1,521.0%    
Schedule of Investments [Line Items]    
Investment owned, percent of net assets   1521.00%