Financial Highlights and Senior Securities - Schedule of Financial Highlights (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Investment Company, Financial Highlights [Roll Forward]
Early repurchase deduction fees (in used per share)	$ 0.01	$ 0.01
Common stock, shares outstanding (in shares)	1,036,579,877			922,574,582
Supplemental Data:
Total net assets	$ 26,149,663	$ 22,378,576	$ 23,795,639	$ 22,685,065	$ 20,970,712	$ 12,854,820
Asset coverage ratio	211.90%			184.50%
CLASS I
Investment Company, Financial Highlights [Roll Forward]
Net asset value, beginning of period (in usd per share)	$ 24.59	$ 25.93
Net investment income (in usd per share)	2.31	1.75
Net unrealized and realized gain (loss) (in usd per share)	0.24	(1.43)
Net increase (decrease) in net assets resulting from operations (in usd per share)	2.55	0.32
Distributions from net investment income (in usd per share)	(1.91)	(1.64)
Distributions from net realized gains (in usd per share)	0	0
Net increase (decrease) in net assets from shareholders' distributions (in usd per share)	(1.91)	(1.64)
Early repurchase deduction fees (in used per share)	0	0.01
Total increase (decrease) in net assets (in usd per share)	0.64	(1.31)
Net asset value, ending of period (in usd per share)	$ 25.23	$ 24.62
Common stock, shares outstanding (in shares)	682,310,681	598,605,098
Total return based on NAV	10.73%	1.26%
Ratios:
Ratio of net expenses to average net assets	10.49%	6.42%
Ratio of net investment income to average net assets	12.38%	9.24%
Portfolio turnover rate	7.70%	13.59%
Supplemental Data:
Asset coverage ratio	211.90%	181.70%
Capital transaction (in usd per share)	$ (0.01)
Ratio of expenses to average net assets, before waivers	10.49%	5.75%
Ratio of expenses to average net assets, waivers	0.00%	0.00%
CLASS I | Common Stock
Investment Company, Financial Highlights [Roll Forward]
Net asset value, beginning of period (in usd per share)	$ 24.59
Net asset value, ending of period (in usd per share)	$ 25.23
Common stock, shares outstanding (in shares)	682,310,681			591,237,616
Supplemental Data:
Total net assets	$ 17,212,365	$ 14,734,969		$ 14,537,932
Class S
Investment Company, Financial Highlights [Roll Forward]
Net asset value, beginning of period (in usd per share)	$ 24.59	$ 25.93
Net investment income (in usd per share)	2.15	1.59
Net unrealized and realized gain (loss) (in usd per share)	0.24	(1.43)
Net increase (decrease) in net assets resulting from operations (in usd per share)	2.39	0.16
Distributions from net investment income (in usd per share)	(1.75)	(1.47)
Distributions from net realized gains (in usd per share)	0	0
Net increase (decrease) in net assets from shareholders' distributions (in usd per share)	(1.75)	(1.47)
Early repurchase deduction fees (in used per share)	0	0
Total increase (decrease) in net assets (in usd per share)	0.64	(1.31)
Net asset value, ending of period (in usd per share)	$ 25.23	$ 24.62
Common stock, shares outstanding (in shares)	340,729,696	266,826,806
Total return based on NAV	10.04%	0.62%
Ratios:
Ratio of net expenses to average net assets	11.33%	7.31%
Ratio of net investment income to average net assets	11.53%	8.41%
Portfolio turnover rate	7.70%	13.59%
Supplemental Data:
Asset coverage ratio	211.90%	181.70%
Capital transaction (in usd per share)	$ (0.01)
Ratio of expenses to average net assets, before waivers	11.33%	6.29%
Ratio of expenses to average net assets, waivers	0.00%	0.00%
Class S | Common Stock
Investment Company, Financial Highlights [Roll Forward]
Net asset value, beginning of period (in usd per share)	$ 24.59
Net asset value, ending of period (in usd per share)	$ 25.23
Common stock, shares outstanding (in shares)	340,729,696			282,541,041
Supplemental Data:
Total net assets	$ 8,595,719	$ 6,568,170		$ 6,947,313
CLASS D
Investment Company, Financial Highlights [Roll Forward]
Net asset value, beginning of period (in usd per share)	$ 24.59	$ 25.93
Net investment income (in usd per share)	2.26	1.71
Net unrealized and realized gain (loss) (in usd per share)	0.24	(1.43)
Net increase (decrease) in net assets resulting from operations (in usd per share)	2.50	0.28
Distributions from net investment income (in usd per share)	(1.86)	(1.59)
Distributions from net realized gains (in usd per share)	0	0
Net increase (decrease) in net assets from shareholders' distributions (in usd per share)	(1.86)	(1.59)
Early repurchase deduction fees (in used per share)	0	0
Total increase (decrease) in net assets (in usd per share)	0.64	(1.31)
Net asset value, ending of period (in usd per share)	$ 25.23	$ 24.62
Common stock, shares outstanding (in shares)	13,539,500	43,689,711
Total return based on NAV	10.54%	1.07%
Ratios:
Ratio of net expenses to average net assets	10.84%	6.79%
Ratio of net investment income to average net assets	12.10%	9.05%
Portfolio turnover rate	7.70%	13.59%
Supplemental Data:
Asset coverage ratio	211.90%	181.70%
Capital transaction (in usd per share)	$ (0.00)
Ratio of expenses to average net assets, before waivers	10.84%	5.48%
Ratio of expenses to average net assets, waivers	0.00%	0.00%
CLASS D | Common Stock
Investment Company, Financial Highlights [Roll Forward]
Net asset value, beginning of period (in usd per share)	$ 24.59
Net asset value, ending of period (in usd per share)	$ 25.23
Common stock, shares outstanding (in shares)	13,539,500			48,795,925
Supplemental Data:
Total net assets	$ 341,579	$ 1,075,437		$ 1,199,819