Debt - Additional Information (Details) € in Millions, £ in Millions			9 Months Ended
		Jan. 09, 2023 USD ($)	Sep. 30, 2023 USD ($)		Sep. 30, 2023 GBP (£)	Sep. 30, 2023 EUR (€)	Jul. 27, 2023 USD ($)	Jun. 30, 2023 USD ($)	Apr. 27, 2023 USD ($)	Mar. 31, 2023 USD ($)	Mar. 28, 2023 USD ($)	Feb. 28, 2023 USD ($)	Jan. 27, 2023 USD ($)	Jan. 18, 2023 USD ($)	Dec. 31, 2022 USD ($)		Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Debt Instrument [Line Items]
Asset coverage percentage			177.30%		177.30%	177.30%									201.60%
Aggregate principal amount			$ 2,075,000,000												$ 700,000,000
Line of credit facility maximum borrowing capacity							$ 725,000,000
Line of credit facility, remaining borrowing capacity			638,572,000	[1]											162,009,000	[2]
Stockholders' equity			1,107,145,000					$ 906,467,000		$ 812,319,000					546,711,000		$ 179,328,000	$ (913,000)
Subscription Facility
Debt Instrument [Line Items]
Aggregate principal amount			$ 1,350,000,000												700,000,000
Line of credit facility maximum borrowing capacity									$ 1,350,000,000		$ 1,300,000,000		$ 850,000,000	$ 800,000,000	700,000,000		$ 400,000,000
Line of credit facility, stated maturity date			Aug. 30, 2024
Optional extension period of maturity date of line of credit facility			364 days
Line of credit facility, remaining borrowing capacity			$ 481,941,000	[1]											$ 162,009,000	[2]
Line of credit, outstanding amount					£ 10.3	€ 13.4
Issuance of letters of credit			$ 0
Line of credit facility, undrawn amount percentage			0.25%
Subscription Facility | Adjusted Daily SOFR
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate			1.95%
Subscription Facility | Adjusted Term SOFR
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate			1.95%
Subscription Facility | Prime Rate
Debt Instrument [Line Items]
Debt instrument, interest rate			0.95%		0.95%	0.95%
Subscription Facility | Federal Funds Rate
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate			0.50%
Subscription Facility | Eurocurrency Rate
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate			1.95%
Subscription Facility | SONIA
Debt Instrument [Line Items]
Interest amount			0.0326%
Debt Instrument, basis spread on variable rate			1.95%
Subscription Facility | Minimum | SOFR
Debt Instrument [Line Items]
Interest amount			0.10%
Subscription Facility | Maximum | SOFR
Debt Instrument [Line Items]
Interest amount			0.25%
Subscription Facility | Maximum | Adjusted Daily SOFR
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate			1.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount			$ 725,000,000
Line of credit facility maximum borrowing capacity		$ 600,000,000										$ 700,000,000
Line of credit facility maximum borrowing capacity under certain circumstances		$ 1,000,000,000
Line of credit facility, remaining borrowing capacity	[1]		156,631,000
Line of credit facility, expiration date		Jan. 19, 2028
Line of credit, outstanding amount					£ 68.7	€ 28.0
Issuance of letters of credit			4,800,000
Line of credit facility, undrawn amount percentage		0.375%
Revolving Credit Facility | Minimum | Adjusted Term SOFR
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate		1.75%
Revolving Credit Facility | Minimum | Alternative Base Rate
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate		1.75%
Revolving Credit Facility | Minimum | Specified Relevant Rate
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate		1.75%
Revolving Credit Facility | Maximum | Adjusted Term SOFR
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate		2.00%
Revolving Credit Facility | Maximum | Alternative Base Rate
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate		2.00%
Revolving Credit Facility | Maximum | Specified Relevant Rate
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate		2.00%
Letter of Credit
Debt Instrument [Line Items]
Issuance of letters of credit up to an aggregate amount			$ 175,000,000
Letter of Credit | Maximum
Debt Instrument [Line Items]
Percentage of commitment fee			10.00%

[1] The amount available may be subject to limitations related to the borrowing base under the Subscription Facility, Revolving Credit Facility and asset coverage requirements.

[2] The amount available may be subject to limitations related to the borrowing base under the Subscription Facility and asset coverage requirements.