Net Assets - Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands																			9 Months Ended
	Sep. 20, 2023	Aug. 17, 2023	Jul. 19, 2023	Jun. 20, 2023	May 17, 2023	Apr. 19, 2023	Mar. 23, 2023	Feb. 24, 2023	Jan. 25, 2023	Sep. 07, 2022	Aug. 24, 2022	Jul. 20, 2022	Jun. 27, 2022	May 24, 2022	Apr. 20, 2022	Mar. 23, 2022	Feb. 23, 2022	Jan. 26, 2022	Sep. 30, 2023	Sep. 30, 2022
Class I
Class of Stock [Line Items]
Declared distribution (in usd per share)	$ 0.2200	$ 0.2200	$ 0.2100	$ 0.2100	$ 0.2100	$ 0.2100	$ 0.2100	$ 0.2100	$ 0.2100	$ 0.1740	$ 0.1740		$ 0.1740	$ 0.1740	$ 0.1740	$ 0.1740	$ 0.1740	$ 0.1740	$ 1.9100	$ 1.6360
Distribution Amount	$ 153,681	$ 148,342	$ 138,028	$ 142,770	$ 137,362	$ 135,044	$ 138,990	$ 127,513	$ 125,726	$ 108,483	$ 105,836		$ 100,372	$ 96,450	$ 89,838	$ 82,959	$ 75,042	$ 66,686	$ 1,247,456	$ 871,106
Class I | Net Investment Income
Class of Stock [Line Items]
Declared distribution (in usd per share)																			$ 1.9100	$ 1.6360
Distribution Amount																			$ 1,247,456	$ 871,106
Class I | Net Realized Gains
Class of Stock [Line Items]
Declared distribution (in usd per share)																			$ 0	$ 0
Distribution Amount																			$ 0	$ 0
Class S
Class of Stock [Line Items]
Declared distribution (in usd per share)	$ 0.2023	$ 0.2023	$ 0.1924	$ 0.1925	$ 0.1924	$ 0.1925	$ 0.1924	$ 0.1924	$ 0.1926	$ 0.1563		$ 0.1564	$ 0.1561	$ 0.1558	$ 0.1557	$ 0.1557	$ 0.1556	$ 0.1556	$ 1.7518	$ 1.4735
Distribution Amount	$ 69,591	$ 67,089	$ 62,065	$ 61,185	$ 59,351	$ 58,078	$ 57,471	$ 56,106	$ 55,316	$ 41,985		$ 39,451	$ 38,018	$ 35,893	$ 32,985	$ 29,834	$ 26,598	$ 23,816	$ 546,252	$ 327,287
Class S | Net Investment Income
Class of Stock [Line Items]
Declared distribution (in usd per share)																			$ 1.7518	$ 1.4735
Distribution Amount																			$ 546,252	$ 327,287
Class S | Net Realized Gains
Class of Stock [Line Items]
Declared distribution (in usd per share)																			$ 0	$ 0
Distribution Amount																			$ 0	$ 0
CLASS D
Class of Stock [Line Items]
Declared distribution (in usd per share)	$ 0.2148	$ 0.2148	$ 0.2048	$ 0.2048	$ 0.2048	$ 0.2048	$ 0.2048	$ 0.2048	$ 0.2049	$ 0.1688	$ 0.1688		$ 0.1687	$ 0.1686	$ 0.1686	$ 0.1686	$ 0.1686	$ 0.1686	$ 1.8633	$ 1.5881
Distribution Amount	$ 2,908	$ 2,635	$ 2,551	$ 1,649	$ 1,564	$ 1,591	$ 1,659	$ 10,343	$ 10,247	$ 7,401	$ 7,073		$ 6,190	$ 5,699	$ 5,126	$ 4,551	$ 3,961	$ 3,469	$ 35,147	$ 52,959
CLASS D | Net Investment Income
Class of Stock [Line Items]
Declared distribution (in usd per share)																			$ 1.8633	$ 1.5881
Distribution Amount																			$ 35,147	$ 52,959
CLASS D | Net Realized Gains
Class of Stock [Line Items]
Declared distribution (in usd per share)																			$ 0	$ 0
Distribution Amount																			$ 0	$ 0