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Fair Value of Financial Instruments - Additional Information (Details) - Long-Term Credit Facility - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Line of credit facility amendment costs	$ 6.5	$ 0.0	$ 0.0
Net change in unrealized (appreciation) depreciation on debt	$ (2.3)	$ (4.9)

X

- Definition

Line of credit facility amendment costs.

+ References

No definition available.

+ Details

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Namespace Prefix:	pflt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Net change in unrealized (appreciation) depreciation on debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	pflt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: