Net Assets - Common Shares Of Beneficial Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Class of Stock [Line Items]
Net increase (decrease) (in shares)	63,519,410	135,460,129	413,290,498	327,044,195
Net increase (decrease)	$ 1,595,411	$ 3,497,511	$ 10,630,756	$ 8,369,689
CLASS I
Class of Stock [Line Items]
Subscriptions (in shares)	50,251,731	96,021,435	271,964,030	240,492,026
Subscriptions	$ 1,253,674	$ 2,479,115	$ 6,973,021	$ 6,148,343
Share transfers between classes (in shares)	672,828	569,253	2,206,163	675,642
Share transfers between classes	$ 16,753	$ 14,693	$ 56,232	$ 17,438
Distributions reinvested (in shares)	6,079,533	1,899,280	14,582,560	2,859,118
Distributions reinvested	$ 151,911	$ 49,034	$ 370,696	$ 73,596
Share repurchases (in shares)	(24,860,836)	(109,860)	(36,739,213)	(158,598)
Share repurchases	$ (612,073)	$ (2,845)	$ (908,178)	$ (4,103)
Early repurchase deduction (in shares)	0	0	0	0
Early repurchase deduction	$ 426	$ 44	$ 3,339	$ 63
Net increase (decrease) (in shares)	32,143,256	98,380,108	252,013,540	243,868,188
Net increase (decrease)	$ 810,691	$ 2,540,041	$ 6,495,110	$ 6,235,337
CLASS S
Class of Stock [Line Items]
Subscriptions (in shares)	24,072,466	31,873,180	132,866,990	74,739,583
Subscriptions	$ 601,002	$ 823,021	$ 3,406,722	$ 1,916,892
Share transfers between classes (in shares)	(260,310)	(133,281)	(437,194)	(133,281)
Share transfers between classes	$ (6,483)	$ (3,439)	$ (11,003)	$ (3,439)
Distributions reinvested (in shares)	2,447,304	599,258	5,600,358	807,553
Distributions reinvested	$ 61,154	$ 15,471	$ 142,331	$ 20,812
Share repurchases (in shares)	(1,963,074)	(3,875)	(3,628,447)	(3,875)
Share repurchases	$ (48,331)	$ (100)	$ (90,294)	$ (100)
Early repurchase deduction (in shares)	0	0	0	0
Early repurchase deduction	$ 360	$ 13	$ 711	$ 19
Net increase (decrease) (in shares)	24,296,386	32,335,282	134,401,707	75,409,980
Net increase (decrease)	$ 607,702	$ 834,966	$ 3,448,467	$ 1,934,184
CLASS D
Class of Stock [Line Items]
Subscriptions (in shares)	7,190,702	5,133,862	27,916,681	8,259,128
Subscriptions	$ 179,680	$ 132,547	$ 713,712	$ 212,894
Share transfers between classes (in shares)	(412,518)	(435,972)	(1,768,969)	(542,361)
Share transfers between classes	$ (10,270)	$ (11,254)	$ (45,229)	$ (13,999)
Distributions reinvested (in shares)	456,349	46,849	973,728	49,260
Distributions reinvested	$ 11,404	$ 1,210	$ 24,710	$ 1,272
Share repurchases (in shares)	(154,765)	0	(246,189)	0
Share repurchases	$ (3,810)	$ 0	$ (6,087)	$ 0
Early repurchase deduction (in shares)	0	0	0	0
Early repurchase deduction	$ 14	$ 1	$ 73	$ 1
Net increase (decrease) (in shares)	7,079,768	4,744,739	26,875,251	7,766,027
Net increase (decrease)	$ 177,018	$ 122,504	$ 687,179	$ 200,168