Investments at Fair Value - Summary of Geographic Composition of Investments at Fair Value (Parenthetical) (Details)		Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Investment fair value percentage		100.00%	100.00%
Finland
Debt Securities, Available-for-Sale [Line Items]
Investment fair value percentage	[1]	0.00%
Finland | Maximum
Debt Securities, Available-for-Sale [Line Items]
Investment fair value percentage		0.10%	0.10%

[1] Value sums to less than 0.1%.