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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Mar. 31, 2025	Sep. 30, 2024
Commitments And Contingencies Disclosure [Line Items]
Commitments to fund investments	$ 596.3	$ 632.2
Maximum
Commitments And Contingencies Disclosure [Line Items]
Unfunded commitments	$ 65.7	$ 0.0

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- Definition

Commitments and Contingencies Disclosure.

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- Definition

Commitments to fund investments.

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- Definition

Unfunded commitments.

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