Distributions - Cash Distributions on Common Stock (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Distribution Amount
Return of capital	$ 0	$ 0
Net Investment Income	196	179
Short-term capital gains proceeds from the sale of assets	0	0
Long-term capital gains proceeds from the sale of assets	0	0
Total	$ 196	$ 179
Percentage
Return of capital (in percent)	0.00%	0.00%
Net investment income (in percent)	100.00%	100.00%
Short-term capital gains proceeds from the sale of assets (in percent)	0.00%	0.00%
Long-term capital gains proceeds from the sale of assets (in percent)	0.00%	0.00%
Total (in percent)	100.00%	100.00%
Gross investment income attributable to cash income earned (in percent)	87.50%	83.80%
Gross investment income attributable to non-cash accretion of discount (in percent)	3.30%	5.30%
Gross investment income attributable to paid-in-kind interest (in percent)	9.20%	10.90%