Joint Venture - Balance Sheet Information (Details) - USD ($)	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Investments at fair value (cost of $5,158,157 at September 30, 2022)	$ 48,959,003,000		$ 30,795,693,000
Cost	50,175,620,000		30,698,023,000
Cash and cash equivalents	1,588,992,000		617,986,000	$ 392,795,000		$ 52,000
Receivable for investments sold	1,168,633,000		663,594,000
Deferred financing costs	101,752,000		76,357,000
Total assets	52,335,219,000		32,353,714,000
LIABILITIES
Debt	27,043,081,000		18,239,934,000
Distribution payable	157,871,000		100,155,000
Total liabilities	29,956,643,000		19,498,894,000
MEMBERS’ EQUITY
Members’ Equity	9,091,000		4,958,000
Total net assets	22,378,576,000	$ 20,970,712,000	12,854,820,000	$ 8,471,195,000	$ 4,943,934,000	$ 52,000
Total liabilities and net assets	52,335,219,000		$ 32,353,714,000
Nonconsolidated Investee
ASSETS
Investments at fair value (cost of $5,158,157 at September 30, 2022)	5,099,533,000
Cost	5,158,157
Cash and cash equivalents	135,072,000
Interest receivable	20,893,000
Receivable for investments sold	25,346,000
Deferred financing costs	10,627,000
Subscription receivable	2,287,000
Total assets	5,293,758,000
LIABILITIES
Debt	2,591,164,000
Distribution payable	33,536,000
Payable for investments purchased and other liabilities	190,808,000
Total liabilities	2,815,508,000
MEMBERS’ EQUITY
Members’ Equity	2,478,250,000
Total net assets	2,478,250,000
Total liabilities and net assets	$ 5,293,758,000