Commitments and Contingencies - Additional Information (Details) - USD ($)			3 Months Ended		9 Months Ended			12 Months Ended
	Aug. 17, 2021	May 22, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Feb. 22, 2022	Dec. 31, 2022
Loss Contingencies [Line Items]
Organization And Offering Costs				$ 2,940,000		$ 2,940,000
Principal amount outstanding			$ 4,481,153,000		$ 4,481,153,000			$ 3,835,000,000
Net unrealized gains (losses) on Investments			$ 8,921,000	$ (19,885,000)	$ 102,585,000	$ (159,982,000)
Warehousing Transactions
Loss Contingencies [Line Items]
Capital condition required for purchase obligation	$ 600,000,000
Arrangement provided by the financing provider		$ 250,000,000					$ 500,000,000
Debt instrument, spread on variable rate		1.77%
Annual unused fee rate		0.50%
Annual minimum utilization fee rate		1.77%
Percentage of prior minimum utilization amount		50.00%
Percentage of prior facility minimum utilization amount		75.00%
Principal amount outstanding								436,000,000
Debt investment amount of unfunded revolvers delayed draw position								200,000
Purchase price								412,000,000
Net unrealized gains (losses) on Investments								$ 3,000,000