Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Cash flows from operating activities
Net increase (decrease) in net assets resulting from operations	$ 160	$ 265	$ 438	$ 606
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of investments			(3,840)	(1,137)
Paid-in-kind interest			(107)	(116)
Proceeds from sales and repayments of investments			4,512	1,906
Net realized (gain) loss on investments			350	338
Net change in unrealized (appreciation) depreciation on investments			(160)	(237)
Net change in unrealized (appreciation) depreciation on foreign currency forward contracts			19	3
Accretion of discount			(49)	(43)
Amortization of deferred financing costs and discount			14	12
Unrealized (gain)/loss on borrowings in foreign currency			13	(11)
(Increase) decrease in receivable for investments sold and repaid			(222)	36
(Increase) decrease in income receivable			(23)	(90)
(Increase) decrease in prepaid expenses and other assets			(19)	6
Increase (decrease) in payable for investments purchased			1	(14)
Increase (decrease) in management fees payable			(2)	(3)
Increase (decrease) in subordinated income incentive fees payable			3	20
Increase (decrease) in administrative services expense payable			0	0
Increase (decrease) in interest payable			1	(11)
Increase (decrease) in other accrued expenses and liabilities			(24)	(15)
Mark-to-market of hedged debt			18	0
Net cash provided by (used in) operating activities			923	1,250
Cash flows from financing activities
Repurchases of common stock			0	(32)
Stockholder distributions			(616)	(612)
Borrowings under financing arrangements			3,425	1,127
Repayments of financing arrangements			(3,577)	(1,801)
Deferred financing costs paid			(15)	(7)
Net cash provided by (used in) financing activities			(783)	(1,325)
Total increase (decrease) in cash			140	(75)
Cash, cash equivalents and foreign currency at beginning of period			231	251	$ 251
Cash, cash equivalents and foreign currency at end of period	$ 371	$ 176	371	176	$ 231
Supplemental disclosure
Non-cash purchases of investments			(1,055)	(89)
Non-cash sales of investments			1,055	89
Local and excise taxes paid			26	20
Interest paid during the period			$ 334	$ 348