Taxes and Distributions - Summary of Amounts Reclassified for Tax Purposes (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Decrease in paid-in capital	$ (1,976)	$ (900)	$ (531)
Decrease in accumulated net realized loss	4	8	(1,645)
Increase in undistributed net investment income	$ 1,972	$ 892	$ 2,176

Increase (decrease) in accumulated net realized gain for tax purposes.

No definition available.

Name:	pflt_IncreaseDecreaseInAccumulatedNetRealizedGainForTaxPurposes
Namespace Prefix:	pflt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration