Distributions - Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Investment Company [Abstract]
Distributions declared per share (in dollars per share)	$ 0.75	$ 0.70	$ 0.68	$ 0.63	$ 1.45	$ 1.31
Cash distributions declared	$ 210	$ 196	$ 193	$ 179	$ 406	$ 372