Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net increase (decrease) in net assets resulting from operations	$ 3,484,528	$ 3,363,183	$ 663,070
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Net change in unrealized (appreciation) depreciation on investments	114,191	(632,049)	1,050,537
Net change in unrealized (appreciation) depreciation on derivative instruments	(25,699)	13,259	4,301
Net change in unrealized (appreciation) depreciation on foreign currency and other transactions	2,074	3,085	(9,160)
Net realized (gain) loss on investments	176,654	308,564	252,197
Net realized (gain) loss on derivative instruments	0	(3,063)	0
Net realized (gain) loss on foreign currency and other transactions	0	5,483	0
Net change due to hedging activity	424	0	0
Payment-in-kind interest capitalized	(366,024)	(236,822)	(140,006)
Net accretion of discount and amortization of premium	(215,203)	(172,875)	(147,923)
Amortization of deferred financing costs	37,786	31,362	25,136
Amortization of debt issuance costs and original issue discount on notes	33,408	27,699	20,823
Amortization of offering costs	3,851	3,253	5,036
Purchases of investments	(25,250,002)	(7,536,897)	(27,899,547)
Proceeds from sale of investments and principal repayments	7,690,627	6,551,603	8,698,004
Changes in operating assets and liabilities:
Receivable from broker	12,683	89,169	(355,742)
Receivable for investments	62,622	1,195,925	(633,791)
Derivative instruments, net	(16,963)	0	0
Other assets	0	5,088	(4,299)
Payable for investments	180,012	(1,275,443)	348,173
Management fees payable	32,831	13,880	38,354
Income based incentive fees payable	21,781	28,826	58,113
Capital gains based incentive fees payable	0	0	(15,058)
Interest payable	75,407	6,597	265,706
Due to affiliates	(2,856)	(15,390)	29,619
Accrued expenses and other liabilities	19,362	6,803	22,811
Net cash provided by (used in) operating activities	(14,083,632)	1,823,327	(18,185,749)
Cash flows from financing activities:
Borrowings on debt	12,405,681	3,684,216	20,297,052
Repayments on debt	(4,979,693)	(7,235,455)	(11,744,062)
Deferred financing costs paid	(75,013)	(26,087)	(59,410)
Debt issuance costs paid	(16,305)	(15,918)	(7,947)
Deferred offering costs paid	(4,599)	(1,733)	(4,865)
Proceeds from issuance of common shares	10,785,653	7,004,144	12,363,189
Repurchased shares, net of early repurchase deduction paid	(2,096,971)	(3,750,742)	(1,009,799)
Dividends paid in cash	(1,768,522)	(1,350,683)	(938,436)
Net cash provided by (used in) financing activities	14,250,231	(1,692,258)	18,895,722
Net increase (decrease) in cash and cash equivalents	166,599	131,069	709,973
Effect of foreign exchange rate changes on cash and cash equivalents	2,310	(1,200)	23,942
Cash and cash equivalents, beginning of period	1,481,770	1,351,901	617,986
Cash and cash equivalents, end of period	1,650,679	1,481,770	1,351,901
Supplemental information and non-cash activities:
Interest paid during the period	2,034,750	1,946,485	799,997
Distribution payable	331,762	245,032	198,736
Reinvestment of dividends during the period	1,630,598	1,146,098	761,111
Accrued but unpaid debt financing costs	12	0	1,204
Accrued but unpaid debt issuance costs	2,013	0	1,514
Accrued but unpaid offering costs	616	6	6
Share repurchases accrued but not yet paid	531,058	532,774	1,158,283
Excise taxes paid	26,402	5,968	0
Investments contributed in-kind to joint ventures (Note 11)	0	0	459,430
Non-controlled/non-affiliated investments
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Net change in unrealized (appreciation) depreciation on investments	(57,540)	(550,279)	1,007,789
Net realized (gain) loss on investments	176,654	308,777	252,197
Changes in operating assets and liabilities:
Interest receivable	(197,001)	70,730	(392,139)
Controlled/affiliated investments
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Net change in unrealized (appreciation) depreciation on investments	170,626	(81,923)	43,810
Changes in operating assets and liabilities:
Interest receivable	(96)	0	0
Dividends receivable	$ 41,971	$ (28,643)	$ (69,964)