Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash flows from operating activities
Net increase (decrease) in net assets resulting from operations	$ 265	$ (127)	$ 606	$ 25
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of investments			(1,137)	(3,779)
Paid-in-kind interest			(116)	(89)
Proceeds from sales and repayments of investments			1,906	3,530
Net realized (gain) loss on investments			338	(214)
Net change in unrealized (appreciation) depreciation on investments			(237)	930
Net change in unrealized (appreciation) depreciation on foreign currency forward contracts			3	(31)
Accretion of discount			(43)	(69)
Amortization of deferred financing costs and discount			12	11
Unrealized (gain)/loss on borrowings in foreign currency			(11)	(81)
(Increase) decrease in receivable for investments sold and repaid			36	142
(Increase) decrease in income receivable			(90)	(12)
(Increase) decrease in prepaid expenses and other assets			6	(2)
Increase (decrease) in payable for investments purchased			(14)	55
Increase (decrease) in management fees payable			(3)	1
Increase (decrease) in subordinated income incentive fees payable			20	6
Increase (decrease) in administrative services expense payable			0	2
Increase (decrease) in interest payable			(11)	(3)
Increase (decrease) in other accrued expenses and liabilities			(15)	(11)
Net cash provided by (used in) operating activities			1,250	411
Cash flows from financing activities
Repurchases of common stock			(32)	(33)
Stockholder distributions			(612)	(548)
Borrowings under financing arrangements			1,127	2,848
Repayments of financing arrangements			(1,801)	(2,770)
Deferred financing costs paid			(7)	(19)
Net cash provided by (used in) financing activities			(1,325)	(522)
Total increase (decrease) in cash			(75)	(111)
Cash, and foreign currency at beginning of period			251	377	$ 377
Cash, and foreign currency at end of period	$ 176	$ 266	176	266	$ 251
Supplemental disclosure
Non-cash purchases of investments			(89)	(541)
Non-cash sales of investments			89	541
Local and excise taxes paid			20	13
Interest paid during the period			$ 348	$ 248