Debt - Additional Information (Details) € in Millions, £ in Millions, kr in Millions								3 Months Ended	9 Months Ended
	Sep. 16, 2024 USD ($)	Jul. 03, 2024	Jun. 10, 2024 USD ($)	Apr. 01, 2024 USD ($) Swap	Mar. 04, 2024 USD ($)	Feb. 08, 2024 USD ($)	Jan. 09, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 GBP (£)	Sep. 30, 2024 EUR (€)	Sep. 30, 2024 SEK (kr)	Jun. 30, 2024 USD ($)	Jun. 27, 2024 USD ($)	May 23, 2024 USD ($)	Apr. 08, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 GBP (£)	Dec. 31, 2023 EUR (€)	Dec. 01, 2023 USD ($)	Sep. 30, 2023 USD ($)	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 ($)	Sep. 01, 2022 USD ($)
Debt Instrument [Line Items]
Asset coverage percentage								187.40%	187.40%	187.40%	187.40%	187.40%						245.60%	245.60%	245.60%
Aggregate principal amount								$ 4,275,000,000	$ 4,275,000,000									$ 2,225,000,000
Line of credit facility maximum borrowing capacity																							$ 725,000,000
Shareholders' equity								3,084,597,000	3,084,597,000				$ 2,749,507,000				$ 2,380,563,000	1,817,067,000				$ 1,107,145,000		$ 906,467,000		$ 812,319,000					$ 546,711,000
2029 Notes
Debt Instrument [Line Items]
Aggregate principal amount			$ 150,000,000		$ 600,000,000			$ 750,000,000	$ 750,000,000
Debt instrument, interest rate					6.50%			6.50%	6.50%	6.50%	6.50%	6.50%
Gain (loss) on fair value effective hedge									$ 22,500,000
Debt instrument, maturity date			Mar. 11, 2029		Mar. 11, 2029
Proceeds from issuance of debt, net of underwriting discount and offering costs			$ 147,800,000		$ 586,000,000
2029 Notes | SOFR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis									SOFR
2030 Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 600,000,000							$ 600,000,000	$ 600,000,000
Debt instrument, interest rate	5.75%							5.75%	5.75%	5.75%	5.75%	5.75%
Gain (loss) on fair value effective hedge									$ (3,200,000)
Debt instrument, maturity date	Jan. 15, 2030
Derivative maturity date	Jan. 15, 2030
Proceeds from issuance of debt, net of underwriting discount and offering costs	$ 591,700,000
Notional amount of interest rate swap	$ 600,000,000
2030 Notes | SOFR
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate									2.55%
Debt instrument, description of variable rate basis									SOFR
2023 Notes, 2024 Notes, 2026 Notes and 2028 Notes
Debt Instrument [Line Items]
Proceeds from settlements of interest rate swaps excluding upfront fees								$ 13,100,000	$ 24,500,000
Payments for settlements of interest rate swaps excluding upfront fees								$ 16,100,000	$ 30,200,000
Interest Rate Swap | 2029 Notes
Debt Instrument [Line Items]
Number of derivative instruments held | Swap				2
Interest Rate Swap One
Debt Instrument [Line Items]
Derivative maturity date								Mar. 11, 2029	Mar. 11, 2029
Interest Rate Swap One | 2029 Notes
Debt Instrument [Line Items]
Derivative maturity date				Mar. 11, 2029
Notional amount of interest rate swap				$ 600,000,000
Interest Rate Swap Two
Debt Instrument [Line Items]
Derivative maturity date								Mar. 11, 2029	Mar. 11, 2029
Interest Rate Swap Two | 2029 Notes
Debt Instrument [Line Items]
Derivative maturity date				Mar. 11, 2029
Notional amount of interest rate swap				$ 150,000,000
Weighted Average | 2029 Notes | SOFR
Debt Instrument [Line Items]
Debt Instrument, basis spread on variable rate									2.45%
Subscription Facility
Debt Instrument [Line Items]
Aggregate principal amount								$ 1,500,000,000	$ 1,500,000,000									1,500,000,000
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. 29, 2025
Line of credit, outstanding amount										£ 10.3	€ 10.3								£ 10.3	€ 13.4
Issuance of letters of credit								$ 0	$ 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%	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								$ 1,425,000,000	$ 1,425,000,000									725,000,000
Line of credit facility maximum borrowing capacity						$ 1,000,000,000	$ 600,000,000							$ 1,425,000,000	$ 1,375,000,000	$ 1,200,000,000												$ 700,000,000
Line of credit facility maximum borrowing capacity under certain circumstances							$ 1,000,000,000							$ 1,750,000,000
Line of credit facility, stated maturity date						Feb. 08, 2029
Line of credit, outstanding amount										£ 143.7	€ 413.9	kr 78.8							£ 68.7	€ 95.7
Issuance of letters of credit								5,900,000	5,900,000									$ 5,500,000
Line of credit facility, undrawn amount percentage							0.375%
Shareholders' equity								$ 1,100,000	$ 1,100,000
Percentage of net proceeds of sale of equity interests									25.00%
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Asset coverage ratio								1	1	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	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]
Line of credit facility maximum borrowing capacity								$ 400,000,000	$ 400,000,000
Letter of Credit | Maximum
Debt Instrument [Line Items]
Percentage of commitment fee									10.00%
Incremental Term Loan
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity															$ 100,000,000