Agreements and Related Party Transactions - Summary of Investments in Affiliates (Parenthetical) (Details) - Controlled Affiliated	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2021
First Eagle Logan JV, LLC
Investments In And Advances To Affiliates [Line Items]
Percentage of subordinated notes hold	100.00%
Percentage of class E notes hold	100.00%
Minimum | C B D C Senior Loan Fund L L C
Investments In And Advances To Affiliates [Line Items]
Percentage of outstanding voting securities owned		25.00%
Minimum | First Eagle Logan JV, LLC
Investments In And Advances To Affiliates [Line Items]
Percentage of outstanding voting securities owned	25.00%