Financial Instruments - Schedule of Net Realized And Unrealized Gains And Losses On Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gain (loss) on foreign currency forward contracts	$ 1	$ 3	$ 20	$ 7
Net change in unrealized appreciation (depreciation) on foreign currency forward contracts	$ (6)	$ 0	(19)	(3)
Foreign Exchange Forward
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gain (loss) on foreign currency forward contracts			20	7
Net change in unrealized appreciation (depreciation) on foreign currency forward contracts			(19)	(3)
Total			$ 1	$ 4