Debt - Additional Information (Details) € in Millions, £ in Millions				12 Months Ended
		Feb. 08, 2024 USD ($)	Jan. 09, 2023 USD ($)	Dec. 31, 2023 USD ($)		Dec. 31, 2023 GBP (£)	Dec. 31, 2023 EUR (€)	Dec. 01, 2023 USD ($)	Jul. 27, 2023 USD ($)	Apr. 27, 2023 USD ($)	Mar. 28, 2023 USD ($)	Feb. 28, 2023 USD ($)	Jan. 27, 2023 USD ($)	Jan. 18, 2023 USD ($)	Dec. 31, 2022 USD ($)		Dec. 31, 2022 GBP (£)	Dec. 31, 2022 EUR (€)	Sep. 01, 2022 USD ($)
Debt Instrument [Line Items]
Asset coverage percentage				245.60%		245.60%	245.60%								201.60%		201.60%	201.60%
Aggregate principal amount				$ 2,225,000,000											$ 700,000,000
Line of credit facility maximum borrowing capacity									$ 725,000,000
Line of credit facility, remaining borrowing capacity				971,485,000	[1]										162,009,000	[2]
Shareholders' equity				1,817,067,000											546,711,000
Subscription Facility
Debt Instrument [Line Items]
Aggregate principal amount				$ 1,500,000,000											700,000,000
Line of credit facility maximum borrowing capacity								$ 1,500,000,000		$ 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				$ 445,267,000	[1]										162,009,000	[2]
Line of credit, outstanding amount						£ 10.3	€ 13.4										£ 10.3	€ 13.4
Issuance of letters of credit				$ 0											$ 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 | Adjusted Daily SOFR
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate				1.00%
Subscription Facility | Maximum | SOFR
Debt Instrument [Line Items]
Interest amount				0.25%
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]			526,218,000
Line of credit facility, expiration date			Jan. 19, 2028
Line of credit, outstanding amount						£ 68.7	€ 95.7
Issuance of letters of credit				5,500,000
Line of credit facility, undrawn amount percentage			0.375%
Shareholders' equity				$ 356,000,000
Percentage of net proceeds of sale of equity interests				25.00%
Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity		$ 1,000,000,000
Line of credit facility maximum borrowing capacity under certain circumstances		$ 1,750,000,000
Line of credit facility, stated maturity date		Feb. 08, 2029
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Asset coverage ratio				1		1	1
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
Debt Instrument [Line Items]
Asset coverage ratio				1.5		1.5	1.5
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.