Net Assets - Common Shares Of Beneficial Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Class of Stock [Line Items]
Net increase (decrease) (in shares)	79,276,274	63,519,410	114,005,295	413,290,498
Net increase (decrease)	$ 1,973,193	$ 1,595,411	$ 2,830,071	$ 10,630,756
CLASS I
Class of Stock [Line Items]
Subscriptions (in shares)	52,915,604	50,251,731	111,912,417	271,964,030
Subscriptions	$ 1,320,655	$ 1,253,674	$ 2,782,476	$ 6,973,021
Share transfers between classes (in shares)	706,080	672,828	46,287,982	2,206,163
Share transfers between classes	$ 17,624	$ 16,753	$ 1,149,483	$ 56,232
Distributions reinvested (in shares)	8,098,617	6,079,533	22,457,227	14,582,560
Distributions reinvested	$ 202,132	$ 151,911	$ 557,869	$ 370,696
Share repurchases (in shares)	(16,240,256)	(24,860,836)	(89,584,561)	(36,739,213)
Share repurchases	$ (409,742)	$ (612,073)	$ (2,230,353)	$ (908,178)
Early repurchase deduction (in shares)	0	0	0	0
Early repurchase deduction	$ 29	$ 426	$ 107	$ 3,339
Net increase (decrease) (in shares)	45,480,045	32,143,256	91,073,065	252,013,540
Net increase (decrease)	$ 1,130,698	$ 810,691	$ 2,259,582	$ 6,495,110
CLASS S
Class of Stock [Line Items]
Subscriptions (in shares)	28,376,209	24,072,466	64,410,351	132,866,990
Subscriptions	$ 708,441	$ 601,002	$ 1,601,265	$ 3,406,722
Share transfers between classes (in shares)	(523,520)	(260,310)	(2,229,790)	(437,194)
Share transfers between classes	$ (13,077)	$ (6,483)	$ (55,217)	$ (11,003)
Distributions reinvested (in shares)	3,591,471	2,447,304	9,886,169	5,600,358
Distributions reinvested	$ 89,644	$ 61,154	$ 245,606	$ 142,331
Share repurchases (in shares)	(3,268,530)	(1,963,074)	(13,878,075)	(3,628,447)
Share repurchases	$ (82,465)	$ (48,331)	$ (345,740)	$ (90,294)
Early repurchase deduction (in shares)	0	0	0	0
Early repurchase deduction	$ 17	$ 360	$ 186	$ 711
Net increase (decrease) (in shares)	28,175,630	24,296,386	58,188,655	134,401,707
Net increase (decrease)	$ 702,560	$ 607,702	$ 1,446,100	$ 3,448,467
CLASS D
Class of Stock [Line Items]
Subscriptions (in shares)	5,767,486	7,190,702	8,690,107	27,916,681
Subscriptions	$ 143,591	$ 179,680	$ 215,875	$ 713,712
Share transfers between classes (in shares)	(182,545)	(412,518)	(44,058,747)	(1,768,969)
Share transfers between classes	$ (4,547)	$ (10,270)	$ (1,094,266)	$ (45,229)
Distributions reinvested (in shares)	35,658	456,349	669,958	973,728
Distributions reinvested	$ 891	$ 11,404	$ 16,596	$ 24,710
Share repurchases (in shares)	0	(154,765)	(557,743)	(246,189)
Share repurchases	$ 0	$ (3,810)	$ (13,827)	$ (6,087)
Early repurchase deduction (in shares)	0	0	0	0
Early repurchase deduction	$ 0	$ 14	$ 11	$ 73
Net increase (decrease) (in shares)	5,620,599	7,079,768	(35,256,425)	26,875,251
Net increase (decrease)	$ 139,935	$ 177,018	$ (875,611)	$ 687,179