Distributions (Details) - $ / shares	3 Months Ended
Distributions (Details) - $ / shares	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Dividends Payable [Line Items]
Common stock, dividends declared per share (in dollars per share)				$ 0.43	$ 0.43	$ 0.43	$ 0.43	$ 0.43
Preferred stock, dividends declared per share (in dollars per share)	$ 21.76	$ 21.76	$ 21.76	$ 28.35	$ 28.35	$ 28.35	$ 28.35	$ 28.31
O 2024 Q2 Dividends
Dividends Payable [Line Items]
Common stock, dividends declared per share (in dollars per share)			0.29
S 2024 Q2 Dividends
Dividends Payable [Line Items]
Common stock, dividends declared per share (in dollars per share)			$ 0.04
O 2024 Q3 Dividends
Dividends Payable [Line Items]
Common stock, dividends declared per share (in dollars per share)		0.29
S 2024 Q3 Dividends
Dividends Payable [Line Items]
Common stock, dividends declared per share (in dollars per share)		$ 0.04
O 2024 Q4 Dividends
Dividends Payable [Line Items]
Common stock, dividends declared per share (in dollars per share)	0.29
S 2024 Q4 Dividends
Dividends Payable [Line Items]
Common stock, dividends declared per share (in dollars per share)	$ 0.04

Franklin BSP Capital Corp 10-K