Investments - Schedule of Composition Of Investment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Cost	$ 10,995,734	$ 6,683,052
Total Investments before Cash Equivalents, Fair Value	11,033,070	6,719,588
Total Cash Equivalents, Cost	400,000	55,000
Total Cash Equivalents, Fair Value	400,000	55,000
Total Investments after Cash Equivalents, Cost	11,395,734	6,738,052
Total Investments after Cash Equivalents, Fair Value	11,433,070	6,774,588
Total Assets and Liabilities at Fair Value, Cost	11,395,734	6,738,052
Total Assets and Liabilities at Fair Value	11,441,137	6,781,397
Level 1
Schedule of Investments [Line Items]
Total Cash Equivalents, Fair Value	400,000	55,000
Total Investments after Cash Equivalents, Fair Value	400,000	55,000
Total Assets and Liabilities at Fair Value	400,000	55,000
Level 2
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Fair Value	2,827,843	1,334,033
Total Investments after Cash Equivalents, Fair Value	2,827,843	1,334,033
Total Assets and Liabilities at Fair Value	2,835,910	1,340,842
Level 3
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Fair Value	8,205,227	5,385,555
Total Investments after Cash Equivalents, Fair Value	8,205,227	5,385,555
Total Assets and Liabilities at Fair Value	8,205,227	5,385,555
Money Market Fund
Schedule of Investments [Line Items]
Total Cash Equivalents, Cost	400,000	55,000
Total Cash Equivalents, Fair Value	400,000	55,000
Money Market Fund | Level 1
Schedule of Investments [Line Items]
Total Cash Equivalents, Fair Value	400,000	55,000
First Lien Secured Debt
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Cost	10,955,278	6,633,492
Total Investments before Cash Equivalents, Fair Value	11,011,201	6,680,870
First Lien Secured Debt | Level 2
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Fair Value	2,827,613	1,324,780
First Lien Secured Debt | Level 3
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Fair Value	8,183,588	5,356,090
Second Lien Secured Debt
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Cost	39,329	39,474
Total Investments before Cash Equivalents, Fair Value	20,795	28,808
Second Lien Secured Debt | Level 3
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Fair Value	20,795	28,808
Unsecured Debt
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Cost	234	9,489
Total Investments before Cash Equivalents, Fair Value	230	9,253
Unsecured Debt | Level 2
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Fair Value	230	9,253
Common Equity/Interests
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Cost	676	498
Total Investments before Cash Equivalents, Fair Value	721	624
Common Equity/Interests | Level 3
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Fair Value	721	624
Preferred Equity
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Cost	217	99
Total Investments before Cash Equivalents, Fair Value	123	33
Preferred Equity | Level 3
Schedule of Investments [Line Items]
Total Investments before Cash Equivalents, Fair Value	123	33
Currency Swaps
Schedule of Investments [Line Items]
Total Assets and Liabilities at Fair Value	1,430
Currency Swaps | Level 2
Schedule of Investments [Line Items]
Total Assets and Liabilities at Fair Value	1,430
Interest Rate Swap
Schedule of Investments [Line Items]
Total Assets and Liabilities at Fair Value	(4,579)	10,490
Interest Rate Swap | Level 2
Schedule of Investments [Line Items]
Total Assets and Liabilities at Fair Value	(4,579)	10,490
Foreign Exchange Forward Transactions
Schedule of Investments [Line Items]
Total Assets and Liabilities at Fair Value	11,216	(3,681)
Foreign Exchange Forward Transactions | Level 2
Schedule of Investments [Line Items]
Total Assets and Liabilities at Fair Value	$ 11,216	$ (3,681)