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Investments - Summary of Listing of PSSL's Individual Investments (Parenthetical) (Details)	6 Months Ended	12 Months Ended
	Mar. 31, 2023	Sep. 30, 2022
Investment, Identifier [Axis]: Liabilities in Excess of Other Assets — (1,229.0)%
Schedule Of Investments [Line Items]
Investment owned, percent of liabilities in excess of other assets	(1229.00%)
Investment, Identifier [Axis]: Related Party PSSL Cash and Cash Equivalents - 50.8%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets	50.80%
Investment, Identifier [Axis]: Related Party PSSL Cash and Cash Equivalents - 59.7%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets		59.70%
Investment, Identifier [Axis]: Related Party PSSL Equity Securities - 0.4%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets	0.40%	0.40%
Investment, Identifier [Axis]: Related Party PSSL First Lien Secured Debt - 1,296.4%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets	1296.40%
Investment, Identifier [Axis]: Related Party PSSL First Lien Secured Debt - 1,330.4%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets		1330.40%
Investment, Identifier [Axis]: Related Party PSSL Investments - 1,307.6%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets	1307.60%
Investment, Identifier [Axis]: Related Party PSSL Investments - 1,335.9%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets		1335.90%
Investment, Identifier [Axis]: Related Party PSSL Investments and Cash Equivalents —1,329.0%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets	1329.00%	1329.00%
Investment, Identifier [Axis]: Related Party PSSL Liabilities in Excess of Other Assets — (1,229.0)%
Schedule Of Investments [Line Items]
Investment owned, percent of liabilities in excess of other assets		(1229.00%)
Investment, Identifier [Axis]: Related Party PSSL Members Equity-100.0%
Schedule Of Investments [Line Items]
Investment owned, percent of members' equity	100.00%	100.00%
Investment, Identifier [Axis]: Related Party PSSL Second Lien Secured Debt - 5.0%
Schedule Of Investments [Line Items]
Investment owned, percentage of net assets	5.00%	5.00%

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